BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Summary of WG1 DTSTART;VALUE=DATE-TIME:20240419T010000Z DTEND;VALUE=DATE-TIME:20240419T011000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-248@indico.nsrrc.org.tw DESCRIPTION:Speakers: Jui-Che Huang (NSRRC)\nhttps://indico.nsrrc.org.tw/e vent/16/contributions/248/ LOCATION:Activity Center Room D260 URL:https://indico.nsrrc.org.tw/event/16/contributions/248/ END:VEVENT BEGIN:VEVENT SUMMARY:Summary of WG2 DTSTART;VALUE=DATE-TIME:20240419T011000Z DTEND;VALUE=DATE-TIME:20240419T012000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-249@indico.nsrrc.org.tw DESCRIPTION:Speakers: Chang-Seong MOON (Kyungpook National University)\nht tps://indico.nsrrc.org.tw/event/16/contributions/249/ LOCATION:Activity Center Room D260 URL:https://indico.nsrrc.org.tw/event/16/contributions/249/ END:VEVENT BEGIN:VEVENT SUMMARY:Summary of WG6 DTSTART;VALUE=DATE-TIME:20240419T015000Z DTEND;VALUE=DATE-TIME:20240419T020000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-253@indico.nsrrc.org.tw DESCRIPTION:Speakers: Go Iwai (KEK)\nhttps://indico.nsrrc.org.tw/event/16/ contributions/253/ LOCATION:Activity Center Room D260 URL:https://indico.nsrrc.org.tw/event/16/contributions/253/ END:VEVENT BEGIN:VEVENT SUMMARY:Closing talk DTSTART;VALUE=DATE-TIME:20240419T021000Z DTEND;VALUE=DATE-TIME:20240419T022000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-255@indico.nsrrc.org.tw DESCRIPTION:Speakers: Huang-Hsiu Tsai (NSRRC)\, Kota NAKANISHI (KEK)\nhttp s://indico.nsrrc.org.tw/event/16/contributions/255/ LOCATION:Activity Center Room D260 URL:https://indico.nsrrc.org.tw/event/16/contributions/255/ END:VEVENT BEGIN:VEVENT SUMMARY:Summary of WG4 DTSTART;VALUE=DATE-TIME:20240419T013000Z DTEND;VALUE=DATE-TIME:20240419T014000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-251@indico.nsrrc.org.tw DESCRIPTION:Speakers: MING-WEI LIN (National Tsing Hua University)\nhttps: //indico.nsrrc.org.tw/event/16/contributions/251/ LOCATION:Activity Center Room D260 URL:https://indico.nsrrc.org.tw/event/16/contributions/251/ END:VEVENT BEGIN:VEVENT SUMMARY:On-line bunch-by-bunch position and synchrotron phase monitoring a nd its study at the Taiwan Photon Source DTSTART;VALUE=DATE-TIME:20240417T034000Z DTEND;VALUE=DATE-TIME:20240417T040000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-167@indico.nsrrc.org.tw DESCRIPTION:Speakers: Chih-Hsien Huang (NSRRC)\nThe online bunch-by-bunch position and phase monitor has been established by employing a high-speed analog-to-digital converter\, meticulously synchronized with the accelerat or's radio frequency. I/Q demodulation is utilized in the phase monitor to calculate the beam phase. To unravel the intricacies of bunch motion\, in dependent component analysis has been employed\, efficiently segregating t he bunch motion into discrete sources. The resulting bunch motion is a dir ect outcome of the linear combination of these distinct sources\, signific antly simplifying the overarching data analysis procedure. An examination of the tune variation in these sources is conducted through a numerical an alysis of fundamental frequencies. These monitors are used to study the bu nch motion during injection\, transient beam loading effects at various be am currents\, and synchronous motion during routine operation.\n\nhttps:// indico.nsrrc.org.tw/event/16/contributions/167/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/167/ END:VEVENT BEGIN:VEVENT SUMMARY:Overview of Korea 4GSR project DTSTART;VALUE=DATE-TIME:20240417T063000Z DTEND;VALUE=DATE-TIME:20240417T065000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-190@indico.nsrrc.org.tw DESCRIPTION:Speakers: Sung-Ju Park (Pohang Accelerator Laboratory)\nA 4th Generation Light Source is being built in Ochang\, Korea (Korea-4GSR proje ct). It can produce synchrotron light that is 100 to 1000 times brighter t han that of the 3rd generation source like PLS-II in the Pohang Accelerato r Laboratory (PAL). The Korea-4GSR is designed to have a circumference of 800 meters to implement a Diffraction-Limited storage ring. This size is t hree times that of PLS-II\, requiring significantly smaller magnet and vac uum chamber apertures for stronger focusing\, and the size of the electron beam also reduces by more than tenfold\, making the physical/engineering design of the accelerator and the control and stability of the electron/ph oton beams very challenging. Fully utilizing PAL's experiences gained duri ng the construction and operation of the PLS-II and the PAL-XFEL (a 10-GeV X-ray Free Electron Laser)\, we have completed the physics design of Kore a-4GSR\, and the engineering design is now in its final stages\, bringing the successful construction of Korea-4GSR closer. Furthermore\, through ac tive exchanges with overseas accelerator laboratories\, we are trying to s trengthen human networks and secure the latest design\, testing\, and manu facturing techniques.\n\nhttps://indico.nsrrc.org.tw/event/16/contribution s/190/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/190/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the yields of photon stimulated desorption and phot oelectrons at a PSD-beamline DTSTART;VALUE=DATE-TIME:20240417T080000Z DTEND;VALUE=DATE-TIME:20240417T082000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-191@indico.nsrrc.org.tw DESCRIPTION:Speakers: Gao-Yu Hsiung (NSRRC)\nSynchrotron radiation induced high yields of gas-desorption and photoelectrons from the vacuum beam duc ts of large accelerators results in huge impacts of shortening the beam li fetime and beam instabilities from the trapped ions or electron cloud. Ins pection of surface cleanness and coated materials on top surface layers of beam ducts by directly measuring the photon stimulated desorption (PSD) a nd photoelectron yield (PEY) at a beamline of synchrotron light source pro vides a quick and sensitive analysis of surface qualities of cleanness. A PSD-beamline BL19B of 1.5 GeV Taiwan Light Source (TLS) features a prompt measurement of PSD-yield and PEY for various vacuum tubes\, e.g. titanium\ , stainless steel\, copper\, aluminum alloys\, and the NEG-coated chambers \, will be described in this presentation.\n\nhttps://indico.nsrrc.org.tw/ event/16/contributions/191/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/191/ END:VEVENT BEGIN:VEVENT SUMMARY:A Design Study of Accelerator Neutron Sources on Neutron Beam Util ization for Post Kyoto University Research Reactor DTSTART;VALUE=DATE-TIME:20240418T084000Z DTEND;VALUE=DATE-TIME:20240418T090000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-228@indico.nsrrc.org.tw DESCRIPTION:Speakers: Yasutoshi Kuriyama (Kyoto University)\nThere are two research reactors at the Institute for Integrated Radiation and Nuclear S cience\, Kyoto University (KURNS). Kyoto University Research Reactor (KUR) of one of the reactors\, which has a thermal output (5 MW)\, is scheduled to be shut down in May 2026. The KUR has been used for many years as a ne utron source for collaborative research\, and we are considering the const ruction of a general-purpose accelerator neutron source using the existing 30MeV proton cyclotron (HM-30) for the BNCT as an alternative neutron sou rce after the KUR is shut down. The problems in promoting this project are the operating cost of the HM-30 and the running cost of the neutron gener ation target. Therefore\, we have started to consider the construction of a small neutron source using 11MeV H- Linac manufactured by AccSys\, which has been used as an injector for the FFA accelerator at KURNS. In this pr esentation\, we will report on the status of the investigation of acceler ator neutron sources at the KURNS.\n\nhttps://indico.nsrrc.org.tw/event/16 /contributions/228/ LOCATION: Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/228/ END:VEVENT BEGIN:VEVENT SUMMARY:Summary of WG3 DTSTART;VALUE=DATE-TIME:20240419T012000Z DTEND;VALUE=DATE-TIME:20240419T013000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-250@indico.nsrrc.org.tw DESCRIPTION:Speakers: Anatoly Rozenfeld (University Of Wollongong \, Centr e for Medical Radiation Physics)\nhttps://indico.nsrrc.org.tw/event/16/con tributions/250/ LOCATION:Activity Center Room D260 URL:https://indico.nsrrc.org.tw/event/16/contributions/250/ END:VEVENT BEGIN:VEVENT SUMMARY:Summary of WG5 DTSTART;VALUE=DATE-TIME:20240419T014000Z DTEND;VALUE=DATE-TIME:20240419T015000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-252@indico.nsrrc.org.tw DESCRIPTION:Speakers: Hsin-Pai Hsueh (NSRRC)\nhttps://indico.nsrrc.org.tw/ event/16/contributions/252/ LOCATION:Activity Center Room D260 URL:https://indico.nsrrc.org.tw/event/16/contributions/252/ END:VEVENT BEGIN:VEVENT SUMMARY:Summary of WG7 DTSTART;VALUE=DATE-TIME:20240419T020000Z DTEND;VALUE=DATE-TIME:20240419T021000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-254@indico.nsrrc.org.tw DESCRIPTION:Speakers: Kota NAKANISHI (KEK)\nhttps://indico.nsrrc.org.tw/ev ent/16/contributions/254/ LOCATION:Activity Center Room D260 URL:https://indico.nsrrc.org.tw/event/16/contributions/254/ END:VEVENT BEGIN:VEVENT SUMMARY:Brightness Enhancement of Laser-driven Coherent Hard X-ray Source DTSTART;VALUE=DATE-TIME:20240417T040000Z DTEND;VALUE=DATE-TIME:20240417T042000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-169@indico.nsrrc.org.tw DESCRIPTION:Speakers: Cheng-Yu Tsai ()\nX-rays have extensive applications in biomedical research\, physics\, and materials science. The Laser Wakef ield Accelerator (LWFA) is one of the methods capable of generating X-rays \, featuring the advantage of a small footprint. This makes it more conven ient for laboratories\, hospitals\, and other facilities to observe struct ures such as crystals\, drugs\, and proteins. The experiment uses the NCU 100TW laser system and LWFA to generate Betatron radiation. The study inve stigated the intensity variation of Betatron radiation brightness correspo nding to electron injection under a tilted shock front. Current results in dicate that X-ray photons exhibit varying degrees of enhancement at shock- front tilt angles of 3.8 and 17.1 degrees\, with increases of 30% and 140% \, respectively.\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/169 / LOCATION:Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/169/ END:VEVENT BEGIN:VEVENT SUMMARY:Upgrade of the He cryoplant at HIAF ANU DTSTART;VALUE=DATE-TIME:20240418T082000Z DTEND;VALUE=DATE-TIME:20240418T084000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-238@indico.nsrrc.org.tw DESCRIPTION:Speakers: Nikolai Lobanov (Australian National University)\nSe veral aspects of the operation of ANU linac cryogenic system is discussed. We will describe the upgrade options of the 30 years old cryogenic facili ty.\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/238/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/238/ END:VEVENT BEGIN:VEVENT SUMMARY:KREONET/KREONet2 and Global Research Network for Accelerators and Detectors in Asia DTSTART;VALUE=DATE-TIME:20240417T090000Z DTEND;VALUE=DATE-TIME:20240417T092000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-230@indico.nsrrc.org.tw DESCRIPTION:Speakers: Chanjin Park (KISTI)\nTo process experimental data f rom high-energy physics experiments\, large amounts of data should be shar ed world-widely. Data movement is essential for global collaborative resea rch. We introduce KREONET/KREONet2\, national science and research network in South Korea that enables to transfer big data for high-energy physics community in Asia. Also we gives a talk about collaborative efforts to bui ld global research network like APONET\, AER\, EARBN and discuss how to bu ild community network for Asian accelerators and detectors.\n\nhttps://ind ico.nsrrc.org.tw/event/16/contributions/230/ LOCATION: Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/230/ END:VEVENT BEGIN:VEVENT SUMMARY:Construction and commissioning of a new T2K near detector SuperFGD DTSTART;VALUE=DATE-TIME:20240417T084000Z DTEND;VALUE=DATE-TIME:20240417T090000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-194@indico.nsrrc.org.tw DESCRIPTION:Speakers: Hikaru Tanigawa (KEK)\nThe T2K experiment is a long baseline neutrino oscillation experiment aiming to discover CP violation i n neutrino mixing. A new detector\, SuperFGD\, has been installed in the n ear detector since October 2023 to reduce systematic errors in the neutrin o oscillation analysis. It consists of about 2 million 1 cm scintillator c ubes\, about 56\,000 wavelength shifting fibers penetrating them from thre e directions\, and an equal number of photodetector MPPCs. The SuperFGD re corded its first neutrino beam data in December 2023. We report about the assembly and commissioning of the unique detector.\n\nhttps://indico.nsrrc .org.tw/event/16/contributions/194/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/194/ END:VEVENT BEGIN:VEVENT SUMMARY:High-precision ion irradiation of materials and devices for protot yping and applications to microelectronics\, photovoltaics\, and space DTSTART;VALUE=DATE-TIME:20240417T080000Z DTEND;VALUE=DATE-TIME:20240417T082000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-209@indico.nsrrc.org.tw DESCRIPTION:Speakers: Zeljko Pastuovic (CAS-ANSTO)\nThis work presents rec ent achievements in development and applications of ANSTO’s ANTARES [1] and SIRIUS [2] microprobe systems for the high-precision irradiation of ma terials and devices for prototyping and applications to microelectronics\, photovoltaics and space. The ANSTO systems can be optimized to deliver a required combination of linear energy transfer\, ion range\, scanning size and speed and uniform ion flux or dose rate of proton (1-10 MeV/u) and me dium - heavy ion (1-3 MeV/u) microbeams produced by the 10 MV tandem Van d e Graaff accelerator and focusing ion microprobe (EM/q2=120)\, and thus me et custom demand for testing. The ANSTO testing capability offers 1) the 3 D precision targeting of ions in user preselected region of interest in a device\, 2) the rapid scanning microbeam irradiation with customized sweep time (pixel dwell time and pixel size)\, the slower\, but larger in dimen sion\, sample scanning with adjustable micromanipulator stage velocity or the hybrid-scanning (combining benefits of two) [3]\, 3) the optimized ion microbeam parameters (LET\, energy(E)\, range(R)\, flux\, and particle ra te) and 4) irradiation in vacuum or in ambient [4]. For testing on the mic rometer and microsecond scale we currently provide focused microbeams of: 1) protons (up to E=12MeV\, LET(Si)≈ 0.03MeVcm2/mg\, R(Si)≈800 micron) \, carbon ions (up to E=36 MeV\, LET≈3 MeVcm2/mg\, R≈40 micron)\, sili con ions (42 MeV\, 14 MeVcm2/mg\, 15 micron)\, chlorine (54 MeV\, 17 MeVcm 2/mg\, 16 micron)\, iron (55 MeV\, 28 MeVcm2/mg\, 13 micron) and nickel io ns (62 MeV\, 28 MeVcm2/mg\, 13 micron)\, but other ions with different E\, LET and R values can also be arranged. As examples\, we show case studies of 1) the Ion Beam Induced Charge – IBIC imaging of SOI and CVD diamond microdosimeters [5]\, 2) the PEEK material radiation hardness [6]\, 3) th e effectiveness of prototyped magnetic shielding against ions in LEO for s mall cube satellites [7]\, 4) the radiation hardness and thermal recovery of proton irradiated Perovskite solar cells [8]\, and 5) the SEU and TID e valuation of SRAM chips [4]. \n\n[1] R. Siegele et al\, Nucl. Instr. Meth. in Phys. Res. B 158\, 31 (1999).\n[2] Z. Pastuovic et al\, Nucl. Instr. M eth. in Phys. Res. B 404\, 1 (2017).\n[3] S. Peracchi et al.\, Proc. 22nd Eur. Conf. on Radiat. Effects Compon. Syst. (RADECS)\, Venice\, Italy\, 20 22.\n[4] S. Peracchi et al.\, IEEE Trans Nucl. Sci. (In Press). \n[5] V. Pan et al.\, IEEE Trans. Nucl. Sci. 70(4)\, 568 (2023).\n[6] K. Rasheed et al.\, Polymer Testing 132\, 108354 (2024).\n[7] Under review.\n[8] S. Tan g et al.\, Adv. Energy Materials 13\, 2300506 (2023).\n\nhttps://indico.ns rrc.org.tw/event/16/contributions/209/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/209/ END:VEVENT BEGIN:VEVENT SUMMARY:MOSkin dosimetry for very high-energy electron FLASH at Australian Synchrotron PEER DTSTART;VALUE=DATE-TIME:20240417T071000Z DTEND;VALUE=DATE-TIME:20240417T073000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-195@indico.nsrrc.org.tw DESCRIPTION:Speakers: James Cayley (Centre for Medical Radiation Physics - University of Wollongong)\nFLASH radiotherapy (RT) is an emerging cancer treatment modality that utilises much higher dose rates than conventional RT. Delivering radiation with ultra-high dose rates (UHDR) has been shown to spare healthy tissue while providing an equal or greater dose to the tu mour. Current research suggests the use of very high-energy electrons can provide further benefits\, such as treatment of deep seated tumours. Linac s have been used to deliver ultra-high dose rate electrons\, with current dosimetry utilising radiochromic film. However\, film does not provide the real-time results required in a clinical setting. The MOSkin detector\, d esigned at the Centre For Medical Radiation Physics at University of Wollo ngong is used in conventional radiotherapy and considered dose-rate indepe ndent over a limited range. This study aims to show that dose-rate indepen dence continues to exist when exposed to a UHDR\, very high energy electro n (VHEE) beam.\n\nThe Australian Synchrotron uses a linac to inject 100 Me V electrons\, capable of delivering pulses with expected dose rates of $10 ^7$ Gy/s. The linac lacks beam scanning or positioning equipment so an arr ay of five detectors was designed\, built and manually positioned with the assistance of a portable laser. An x-ray intensifier screen was positione d behind the array and imaged with a camera\, to collect spatial data and relative beam intensity between pulses. 13 beam currents were used to deli ver 300 pC pulses from 20 ns to 400 ns in length.\n\nThe detector with the highest response was assumed to be closest to the beam centre and an aver age response for each beam current was calculated. Dose rates for each pul se were estimated using a standard MOSkin calibration factor and range fro m approximately $7x10^5$ – $2.5x10^7$ Gy/s. A steep drop off in response was observed at beam currents below 2 mA. Beam profiles were created usin g the camera data\, with a Moffat distribution fitted to determine relativ e intensity between pulses at the detector's estimated location. The ampli tude was extracted from the distributions and normalised to 1\, which enab led plotting against normalised MOSkin data to evaluate detector response against the charge delivered. The MOSkin response is consistent with the x -ray intensifier screen and indicates pulses are being delivered to the ex perimental stage at lower beam current than that measured by the linac dia gnostics. \n\nWhile the imaging equipment cannot provide an estimate of do se\, it explains the variance in detector behaviour between pulses\, espec ially at lower dose rates. While uncertainty is large due to manual positi oning\, the experiment has shown that further investigation is justified a s the MOSkin appears suitable for dosimetry in UHDR VHEE FLASH environment s. Future experiments will be conducted to gain better spatial information as well as an independent measurement of dose.\n\nhttps://indico.nsrrc.or g.tw/event/16/contributions/195/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/195/ END:VEVENT BEGIN:VEVENT SUMMARY:High quality factor and accelerating gradient of 650 MHz supercond ucting cavity for CEPC DTSTART;VALUE=DATE-TIME:20240418T063000Z DTEND;VALUE=DATE-TIME:20240418T065000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-231@indico.nsrrc.org.tw DESCRIPTION:Speakers: Peng Sha (IHEP\, CAS)\nThe 650 MHz single-cell super conducting radio-frequency (SRF) cavities used for the Circular Electron P ositron Collider (CEPC) were studied to achieve a high accelerating gradie nt (Eacc) and high intrinsic quality factor (Q0). The 650 MHz single-cell cavities were subjected to a combination of buffered chemical polishing (B CP) and electropolishing (EP)\, and their Eacc exceeded 40 MV/m. Such a hi gh Eacc may result from the cold EP with more uniform removal. BCP is easy \, cheap\, and rough\, whereas EP is complicated\, expensive\, and precise . Therefore\, the combination of BCP and EP investigated in our study is s uitable for surface treatments of mass SRF cavities. Medium temperature (m id-T) furnace baking was also conducted\, which demonstrated an ultrahigh Q0 of > 8E10 at 22 MV/m\, and an extremely low BCS resistance of ~ 1.0 nΩ was achieved at 2.0 K. The study of CEPC 650 MHz SRF cavities may benefi t SRF community\, which has been referenced by PIP II.\n\nhttps://indico.n srrc.org.tw/event/16/contributions/231/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/231/ END:VEVENT BEGIN:VEVENT SUMMARY:Injection and acceleration of positron beam in plasma wakefield DTSTART;VALUE=DATE-TIME:20240417T034000Z DTEND;VALUE=DATE-TIME:20240417T040000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-165@indico.nsrrc.org.tw DESCRIPTION:Speakers: JInqing Yu ()\nDeveloping an effective method for th e injection and acceleration of positrons in plasma wakefield acceleration has been a persistent issue due to the lack of appropriate wakefield stru cture. We show that the plasma wakefield driven by a hollow proton beam fo rms an electron filament along the axis\, thus providing the acceleration and focusing fields required by positrons. The evolution of the field can drive the injection of stationary positrons\, while the stabilized field c an effectively inject relativistic positrons. This work resolves significa nt challenges related to focusing\, injection\, and stable long-distance a cceleration in positron acceleration\, providing an effective scheme for r ealizing electron-positron collisions through PWFA.\n\nhttps://indico.nsrr c.org.tw/event/16/contributions/165/ LOCATION:Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/165/ END:VEVENT BEGIN:VEVENT SUMMARY:Status and prospect of KEK DTSTART;VALUE=DATE-TIME:20240417T011500Z DTEND;VALUE=DATE-TIME:20240417T015500Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-243@indico.nsrrc.org.tw DESCRIPTION:Speakers: Shoji Asai (KEK)\nKEK is a research institute in Jap an carrying out basic science research in a wide range of scientific field s from particle and nuclear physics to materials and life sciences using l arge accelerator facilities. KEK’s research facilities are open to inter national science communities. Three on-going projects are SuperKEKB/Belle II and Photon Factory at the Tsukuba campus and J-PARC at the Tokai campus \, a joint project between KEK and Japan Atomic Energy Agency. KEK is also making efforts to prepare for future projects such as the International L inear Collider(ILC). There are many progresses in J-PARC(750kW)\, SuperKEK B and ILC. Current status and future prospects of research activities at K EK is described in the talk.\n\nhttps://indico.nsrrc.org.tw/event/16/contr ibutions/243/ LOCATION: Activity Center Room D260 URL:https://indico.nsrrc.org.tw/event/16/contributions/243/ END:VEVENT BEGIN:VEVENT SUMMARY:On recent progress and perspectives in development of aerogel base d Cherenkov detectors for future colliding beam experiments DTSTART;VALUE=DATE-TIME:20240418T032000Z DTEND;VALUE=DATE-TIME:20240418T034000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-199@indico.nsrrc.org.tw DESCRIPTION:Speakers: Alexander Barnyakov (Budker Institute of Nuclear Phy sics)\nNow there are several colliding beam experiments proposed for reali sation in a future all around the world. Among them are hadron colliding b eam experiment SPD at NICA (JINR\, Dubna\, Russia)[1]\, electron-positron colliding beam experiments SCTF (Sarov\, Russia)[2]\, STCF (Hefei\, China) \, CEPC (China)[3]\, and electron-ion colliding experiment EicC (Huizhou\ , Guangdong\, China) [4]. The construction of an universal detectors for e very one of these experiments are presumed. The particle identification sy stem is the natural part of each these universal detectors. The aerogel ba sed Cherenkov detectors are able to provide excellent particle separation in wide momentum range. For some of these experiments like SPD or EicC onl y pi/K-separation up to high momentum range is required for other such lik e SCTF the mu/pi-separation up to 1.5 GeV/c. To satisfy these requirements to PID system several RICH detector concepts based on aerogel Cherenkov r adiators are under consideration. The recent progress in aerogel Cherenkov radiators production in Novosibirsk is presented. Evaluations of expected performances for several RICH concepts like FARICH or mRICH based on Novo sibirsk aerogel is given. For the first time direct comparison of aerogels produced in Novosibirsk and in China performed with help of optical measu rements and beam tests as well. The new concept of RICH detector based on aerogel fibres produced in SINANO is proposed. Some peculiarities of this concept and results obtained with help of MC simulation are discussed too. \n\n[1] http://spd.jinr.ru\n[2] https://sct.inp.nsk.su\n[3] http://cepc.ih ep.ac.cn\n[4] https://indico.pnp.ustc.edu.cn/event/1191/overview\n\nhttps: //indico.nsrrc.org.tw/event/16/contributions/199/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/199/ END:VEVENT BEGIN:VEVENT SUMMARY:Investigation of High-power 4K Nb3Sn Superconducting RF Electron L inac for Production of Medical Radioisotopes DTSTART;VALUE=DATE-TIME:20240417T063000Z DTEND;VALUE=DATE-TIME:20240417T065000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-168@indico.nsrrc.org.tw DESCRIPTION:Speakers: Shigeru Kashiwagi (ELPH\, Tohoku University)\nVariou s types of radioisotopes (RIs) are used in the field of nuclear medicine f or diagnosis\, such as PET and SPECT. In recent years\, RIs are applied to therapy of cancer and the Ac-225 has been confirmed to be effective in th e treatment of advanced cancer. One of the promising RI production methods for medical application is the use of high-intensity beam in accelerators . In the case of an electron accelerator\, a photonuclear reaction is used in the RI production process. We have started research and development of a 4K niobium-tin (Nb3Sn) superconducting RF (SRF) electron accelerator sy stem for RI production\, which can be operated with a compact conduction c ooling system and does not require a large-scale cooling system. As a firs t step\, we plan to develop a single-cell Nb3Sn superconducting cavity and a cryomodule to cool it\, and to demonstrate its performance by beam acce leration experiments. In this presentation\, we report the basic design of the SRF electron linac and R&D schedule of the 35 MeV SRF linac for the R I production.\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/168/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/168/ END:VEVENT BEGIN:VEVENT SUMMARY:Flexible organic semiconductors and amorphous silicon detectors fo r synchrotron microbeam radiation therapy dosimetry DTSTART;VALUE=DATE-TIME:20240417T065000Z DTEND;VALUE=DATE-TIME:20240417T071000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-214@indico.nsrrc.org.tw DESCRIPTION:Speakers: Marco Petasecca (University of Wollongong - Centre f or Medical Radiation Physics)\nIntroduction: Detectors that can provide ac curate dosimetry for microbeam radiation therapy (MRT) must satisfy a numb er of challenging criteria including having intrinsic radiation hardness\, a high dynamic range\, energy and dose rate independence\, and a spatial resolution able to resolve x-ray microbeam spacings on the order of hundr eds of microns.\nAt the Centre for Medical Radiation Physics\, several sol utions using electronics grade silicon devices have been explored in the l ast decade to measure dose in MRT. The limitations of silicon-based device s includes a small dose rate dependence and energy dependence\, but most s ignificantly\, a large radiation beam distortion caused by the silicon sub strate. Even in thinned devices\, this distortion has dimensions comparab le with the primary radiation field\, resulting in a measurable distortion of the dose profiles and in the under-estimation of the peak-to-valley do se ratios. In recent years\, detector architectures based on amorphous mat erials as sensitive volumes have been explored due to their possibility to be deposited in the form of films on flexible substrates such as Polyimid e (Kapton). Two examples of these technologies are hydrogenated amorphous silicon (a-Si:H) planar diodes and solution processable organic semiconduc tor bulk heterojunctions (OSC). The dosimetric performance of these detect ors are reported for both broad beam and microbeam modalities\, and over a range of beam filtrations with experiments performed at the Australian Sy nchrotron in Melbourne. \nResults: The synchrotron x-rays were spatially fractionated into an array of 50 microbeams with a Full-Width-Half-Max of 50 µm and a peak-to-peak distance of 400 µm to explore the potential to use amorphous thin film detectors for MRT dosimetry. The sensitivity and e nergy dependence of the aSi:H detectors fabricated with a combination of N \, P and intrinsic a-Si:H showed a high sensitivity and an energy dependen ce matching closely to the attenuation coefficient ratio of Silicon agains t Water\, despite the substrate being only 0.8 µm thick. The radiation da mage of a-Si:H detectors out to 40 kGy is limited and stabilises at approx imately -17% of the response in pristine conditions. Percentage depth dose profiles from the a-Si:H detector matched those from a PTW microDiamond d etector to within ± 5 % for all beam filtrations\, except in 3T Al-Al due to the energy dependence of the material. The microbeam field profile was reconstructed with a high spatial resolution and returned microbeam width s and peak-to-peak distances of (51 ± 1) µm and (405 ± 5) µm\, respect ively. The peak-to-valley dose ratio was measured as a function of depth a nd agrees within error to the values obtained with the PTW microDiamond. R egarding organic (OSC) detectors\, the highest sensitivity of the flexible 250 nm thick film under the broad beam was determined to be (1958 ± 31) pC Gy-1cm-2 under 0 V bias. The organic x-ray sensor measured a FWHM of (5 1.6 ± 1.9) µm averaged across 3 beam filter conditions. The radiation to lerance of the organic detector was explored by exposing the organic detec tor to continuous irradiation at a 4.5 kGy/s dose-rate. The direct respons e decreased by 35% after a total irradiation dose of 45 kGy. The dosimetri c performance of the OSC sensor with Kapton packaging was compared to an i dentical sample with PET packaging. Broad beam measurements of the PET sam ple demonstrated an additional signal from the PET fluorescence incident o n the OSC active layer generating an opposing negative charge that signifi cantly reduced the sensitivity and reliability of the output for sensitivi ty measurements.\nConclusions: The a-Si:H detectors proved to be comparabl e to commercially available dosimeters employed for quality assurance in M RT. OSCs devices show a high radiation hardness\, no energy dependence\, a nd extreme spatial resolution. The results demonstrate the need for additi onal considerations that must be given to the device packaging when design ing flexible and low-cost radiation detectors for real-world applications. This work proves that amorphous materials are interesting alternatives fo r dosimetry in synchrotron-based radiotherapy modalities.\n\nhttps://indic o.nsrrc.org.tw/event/16/contributions/214/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/214/ END:VEVENT BEGIN:VEVENT SUMMARY:Development and applications of segmented capillary gas-cell with tailoring longitudinal density profiles DTSTART;VALUE=DATE-TIME:20240418T065000Z DTEND;VALUE=DATE-TIME:20240418T071000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-224@indico.nsrrc.org.tw DESCRIPTION:Speakers: Inhyuk Nam (PAL\, POSTECH)\nWe have developed a new segmented capillary gas cell for laser wakefield acceleration (LWFA) and p lasma lenses. This capillary enables the tailoring of longitudinal density profiles in gases or plasmas\, with a transverse guiding structure when d ischarged with high-voltage pulses. For instance\, a down-gradient density profile can be used for controlled injection in LWFA. We tested this segm ented capillary gas cell using a 150 TW laser system at IBS in GIST\, whic h resulted in a reduced energy spread of the electron beam. We also measur ed the longitudinal plasma density profile of the discharged capillary pla sma density using the Stark broadening of hydrogen gas. This novel capilla ry has potential applications in LWFA\, PWFA\, and plasma lenses with a co ntrollable density profile. In this presentation\, we will discuss the dev elopment of the segmented capillary\, recent experimental results from LWF A\, and its future applications.\n\nhttps://indico.nsrrc.org.tw/event/16/c ontributions/224/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/224/ END:VEVENT BEGIN:VEVENT SUMMARY:Electron bunch shaping by laser heater for attosecond XFEL DTSTART;VALUE=DATE-TIME:20240418T071000Z DTEND;VALUE=DATE-TIME:20240418T073000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-170@indico.nsrrc.org.tw DESCRIPTION:Speakers: KOOKJIN MOON (PAL\, POSTECH)\nThe pulse duration of the X-ray free-electron laser (XFEL) relies on the pulse duration of the l ight source\, which commonly is an electron bunch. The energy and the curr ent distributions of the electron bunch can be manipulated by using the la ser heater in the purpose of generating attosecond pulse duration electron bunch. Therefore\, the resultant electron bunch current profile after the bunch compressor chicane right behind the laser heater is programmable by the laser parameters. We performed the electron bunch shaping experiment by using the laser heater at PAL XFEL. The parameter dependencies of the l aser heater shaping are discussed based on analytical and numerical approa ches.\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/170/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/170/ END:VEVENT BEGIN:VEVENT SUMMARY:Preliminary lattice design for Australian Synchrotron 2.0 DTSTART;VALUE=DATE-TIME:20240417T032000Z DTEND;VALUE=DATE-TIME:20240417T034000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-173@indico.nsrrc.org.tw DESCRIPTION:Speakers: Xuanhao Zhang (Australian Synchrotron)\nA new projec t is underway to develop the successor to the current Australian Synchrotr on. The new storage ring is proposed to be 450 m in circumference operatin g at 3 GeV. A preliminary 7BA lattice has been designed which utilises the higher-order achromat (HOA) scheme to suppress strong sextupole driving t erms. The lattice has 24 sectors and a natural horizontal emittance of 50 pm-rad. This is achieved using a combination of strong combined function m agnets and reverse bending magnets in the unit cell\, as well as careful t uning of the bending angles to preserve positive momentum compaction facto r. The dynamic aperture\, momentum aperture and Touschek lifetime have bee n optimised by tuning the linear optics and sextupole strengths with a mul ti-objective genetic algorithm.\n\nhttps://indico.nsrrc.org.tw/event/16/co ntributions/173/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/173/ END:VEVENT BEGIN:VEVENT SUMMARY:Laser-Compton X-ray generation stabilization at KEK LUCX facility by Digital LLRF phase&litude feedforward implementation into RF system DTSTART;VALUE=DATE-TIME:20240417T040000Z DTEND;VALUE=DATE-TIME:20240417T042000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-171@indico.nsrrc.org.tw DESCRIPTION:Speakers: KONSTANTIN POPOV (High Energy Accelerator Research O rganization (KEK))\nKEK LUCX facility is a normal conductive multi-bunch e lectron linear\naccelerator devoted to develop an intense monochromatic so urce of laser-Compton\nX-ray for monochromatic X-Ray imaging. In order to perform samples\ntomography\, stable laser-Compton X-ray beam is necessary . From accelerator side\,\nlaser-Compton X-ray generation stability is bas ically defined by electron beam\nparameters stability\, while these parame ters depend on accelerating field phase and\namplitude. Therefore\, the st abilization of accelerating field is a milestone to\ngenerate stable X-ray . Digital LLRF phase and amplitude feedforward system was\ndeveloped\, tes ted and implemented into KEK LUCX facility RF system for the\naccelerating field precise control.\nThis research presents results of electron beam p arameters stabilization at\nKEK LUCX facility. These parameters are beam a verage energy\, energy spread\n(RMS)\, bunch charge\, beam arrival time\, transverse normalized emittance. Also\,\nDigital LLRF feedforward system t echnical details are explained.\n\nhttps://indico.nsrrc.org.tw/event/16/co ntributions/171/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/171/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of LGAD Sensors at IHEP DTSTART;VALUE=DATE-TIME:20240417T090000Z DTEND;VALUE=DATE-TIME:20240417T092000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-196@indico.nsrrc.org.tw DESCRIPTION:Speakers: Mengzhao Li (Institute of High Energy Physics\, Chin ese Academy of Sciences)\nThe Low Gain Avalanche Diode (LGAD) is a novel s ilicon sensor known for its excellent timing resolution. The AC-Coupled LG AD (AC-LGAD) is a new type 4D detector developed based on LGAD technology\ , capable of accurately measuring the time and position information of par ticles. This presentation will showcase the development status of LGAD and AC-LGAD sensors designed by the Institute of High Energy Physics (IHEP). Following irradiation fluence of 2.5 × 1015 neq/cm2\, the time resolution of IHEP LGAD sensors is superior to 35 ps\, with collected charges exceed ing 10 fC. The IHEP LGAD has been selected as the sensor for the ATLAS Hig h Granularity Timing Detector (HGTD) project. The position resolution of I HEP AC-LGAD can achieve 10 μm\, with a time resolution of 38 ps\, making it suitable for the development of time-track detectors in future collider experiments such as the Circular Electron Positron Collider (CEPC) and th e Future Circular Collider (FCC).\n\nhttps://indico.nsrrc.org.tw/event/16/ contributions/196/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/196/ END:VEVENT BEGIN:VEVENT SUMMARY:Injection and fast extraction systems for J-PARC main ring DTSTART;VALUE=DATE-TIME:20240418T032000Z DTEND;VALUE=DATE-TIME:20240418T034000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-172@indico.nsrrc.org.tw DESCRIPTION:Speakers: Koji ISHII (KEK/J-PARC)\nIn 2023 J-PARC Main Ring ac hieved 750kW beam power for T2K neutrino experiment. The 750kW is the init ial design value of MR and it means to reach a great milestone. In this ta lk\, I will briefly introduce the key technologies needed to achieve this 750kW. One of the key technologies is the injection and extraction systems . The kicker magnet and power supply\, septum magnet and power supply used in the systems will also be mentioned.\n\nhttps://indico.nsrrc.org.tw/eve nt/16/contributions/172/ LOCATION: Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/172/ END:VEVENT BEGIN:VEVENT SUMMARY:A 230 MeV superconducting isochronous cyclotron for proton therapy SC230 DTSTART;VALUE=DATE-TIME:20240418T034000Z DTEND;VALUE=DATE-TIME:20240418T040000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-175@indico.nsrrc.org.tw DESCRIPTION:Speakers: Yuta Ebara (Sumitomo Heavy Industries\, Ltd.)\nA 230 MeV superconducting cyclotron SC230 is currently the most compact isochro nous cyclotron for proton therapy\, with a yoke diameter\, height and weig ht of 2.8 m\, 1.7 m and 65 t\, respectively. It has cryogen-free supercond ucting coils to generate a high magnetic field. It also features a high be am current of up to 1 μA and low power consumption of its system below 20 0 kW. The development process and superconducting technology in SC230 are reported.\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/175/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/175/ END:VEVENT BEGIN:VEVENT SUMMARY:Study on Multipacting Events in SRF Operation at NSRRC DTSTART;VALUE=DATE-TIME:20240418T053000Z DTEND;VALUE=DATE-TIME:20240418T055000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-232@indico.nsrrc.org.tw DESCRIPTION:Speakers: Zong-Kai Liu (NSRRC)\nThe NSRRC operates two synchro tron radiation light sources\, Taiwan Light Source and Taiwan Photon Sourc e. Both sources employ superconducting radio frequency (SRF) cavities. Rec ently\, occurrences of multipacting events have been encountered during th e operation of the SRF modules in both sources\, leading to operational ch allenges. In this report\, we provide an overview of the SRF modules in bo th sources\, investigate the multipacting events\, and propose potential i mprovement solutions.\n\nhttps://indico.nsrrc.org.tw/event/16/contribution s/232/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/232/ END:VEVENT BEGIN:VEVENT SUMMARY:Present status of an infrared free-electron laser facility at Chia ng Mai University DTSTART;VALUE=DATE-TIME:20240417T065000Z DTEND;VALUE=DATE-TIME:20240417T071000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-256@indico.nsrrc.org.tw DESCRIPTION:Speakers: Sakhorn Rimjaem (Chiang Mai University)\nA project t o develop a linac-based MIR/THz free-electron laser (FEL) light source and experimental stations for spectroscopic and ultrafast interaction applica tions is underway at Chiang Mai University in Thailand. The accelerator sy stem serving as the electron beam injector is an existing system\, albeit with modifications to accommodate two newly developed beamlines for MIR/TH z FEL. Engineering design and construction of new components in magnetic b unch compressors and FEL beamlines\, have been conducted based on physics design and beam dynamic simulations. Currently\, nearly all components hav e been installed in the accelerator hall\, and the commissioning of the sy stem is in progress. This contribution provides an overview of the project \, a report and a discussion of the design and beam dynamic simulations f or both the oscillator MIR FEL and the super-radiant THz FEL as well as th e development of components. Furthermore\, the current status of the facil ity will also be presented.\n\nhttps://indico.nsrrc.org.tw/event/16/contri butions/256/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/256/ END:VEVENT BEGIN:VEVENT SUMMARY:Numerical Study of Polarized X-ray Generation by Tilted Shock-Fron t Injection DTSTART;VALUE=DATE-TIME:20240417T061000Z DTEND;VALUE=DATE-TIME:20240417T063000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-177@indico.nsrrc.org.tw DESCRIPTION:Speakers: SUNG-WEI HUANG (National Central University)\nRecent ly\, there has been considerable attention on high-polarization table-top hard X-ray sources\, which facilitate easy deployment in clinics and unive rsity laboratories\, providing convenient access to results regarding mate rial microstructures or properties. Betatron radiation\, one of the X-ray sources that has femtosecond range duration\, μm spot size\, and compact equipment\, is considered an alternative to large synchrotron facilities. The experimental condition based on the NCU 100TW laser to generate high b rightness and polarized X-ray is examined numerically in this study. The e lectron injection mechanism under tilt shock front was studied in transver se and longitudinal wavebreaking\, as well as the polarization behavior of X-ray photons. It was found that under the transverse wavebreaking inject ion mode\, the degree of polarization increased from 20% to 68%. This sugg ests that in experiments\, we can easily increase the polarization of X-ra y sources by controlling the angle of the shock front.\n\nhttps://indico.n srrc.org.tw/event/16/contributions/177/ LOCATION:Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/177/ END:VEVENT BEGIN:VEVENT SUMMARY:Quasistatic simulations of long-distance laser wakefield accelerat ion DTSTART;VALUE=DATE-TIME:20240417T063000Z DTEND;VALUE=DATE-TIME:20240417T065000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-178@indico.nsrrc.org.tw DESCRIPTION:Speakers: Daniil Kutergin (Budker INP)\nQuasistatic approximat ion (QSA) offers opportunities for computationally efficient modeling of l aser pulse propagation over long distances. When simulating the channeling of a powerful laser pulse over tens of meters (studied in the context of XCELS project)\, the QSA gives a speedup of six orders of magnitude compar ed to the particle-in-cell method. This estimate takes into account the ne ed to resolve the laser wavelength for correct modeling of a strongly depl eted pulse. Moreover\, QSA allows to speed up the parametric optimization of the wakefield acceleration by dividing it into two steps: first we find the best regime of laser pulse propagation\, and then we optimize the wit ness parameters by simulating the wave only in the vicinity of the witness . The two-step optimization also minimizes the witness emittance growth du e to numerical noise of the plasma solver.\n\nhttps://indico.nsrrc.org.tw/ event/16/contributions/178/ LOCATION:Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/178/ END:VEVENT BEGIN:VEVENT SUMMARY:Grid Deployment in the KEK Central Computing System (KEKCC) DTSTART;VALUE=DATE-TIME:20240417T084000Z DTEND;VALUE=DATE-TIME:20240417T090000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-179@indico.nsrrc.org.tw DESCRIPTION:Speakers: Go Iwai (KEK)\nThe KEK Central Computing System (KEK CC) is a computer service and facility that provides large-scale computer resources\, including Grid and Cloud computing systems and essential IT se rvices\, such as e-mail and web services.\n\nFollowing the procurement pol icy\, we have replaced the entire KEKCC with a new one once every four or five years. Since 2024 is the last year of the current KEKCC contract\, we would like to review the operational and development achievements regardi ng the Grid system introduced in the KEKCC. Also\, we will share the plann ed schedule\, resource scales\, etc\, for the next KEKCC\, which will be i n production in September 2024.\n\nhttps://indico.nsrrc.org.tw/event/16/co ntributions/179/ LOCATION: Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/179/ END:VEVENT BEGIN:VEVENT SUMMARY:Progress of the High Field Superconducting Magnet Program at IHEP- CAS DTSTART;VALUE=DATE-TIME:20240418T065000Z DTEND;VALUE=DATE-TIME:20240418T071000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-234@indico.nsrrc.org.tw DESCRIPTION:Speakers: Qingjin XU (IHEP-CAS)\nHigh energy proton colliders towards 100 TeV are proposed these years to study the physics beyond the S tandard Model. The colliders call for 16-20 Tesla (T) accelerator magnets to bend and focus the particle beams. IHEP-CAS has been engaged in develop ing high field magnet technology with Nb3Sn and HTS materials from 2014: s everal model dipoles have been developed with combined common coil configu ration\, and advanced iron based superconducting (IBS) technology is being promoted in collaboration with IEE-CAS. The highest field of model dipole s reached 12.47 T in two apertures at 4.2 K with Nb3Sn and NbTi coils. A n ew model dipole aiming for 16 T in the aperture is under fabrication. The magnet consists of 6 Nb3Sn coils and 4 HTS coils: the Nb3Sn coils with com mon coil configuration are expected to provide a dipole field of 13~14 T\, and the HTS insert coils wound with block configuration and a new type of transposed ReBCO cable are expected to provide a dipole field of 3~4 T wi th 13-T background field. Moreover\, development of high current IBS cable s and high field model coils are ongoing: 1.3 kA IBS transposed cable has been successfully fabricated\, and the IBS model coils reached 60 A critic al current at 32 T background field. An overview of the high field magnet program at IHEP-CAS\, present progress and the plan for future will be pre sented.\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/234/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/234/ END:VEVENT BEGIN:VEVENT SUMMARY:Stilling chamber assisted Stable Electron Beam Generation in LWFA DTSTART;VALUE=DATE-TIME:20240417T053000Z DTEND;VALUE=DATE-TIME:20240417T055000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-218@indico.nsrrc.org.tw DESCRIPTION:Speakers: YANJUN GU (SANKEN\, Osaka University)\nThe laser wak e-field acceleration (LWFA) provides energetic electron beams with higher acceleration gradient. The typical strength of the electrostatic field rea ches GV/cm. Significant developments have been achieved in the past decade s and various mechanisms have been proposed for beam quality improving. LW FA is expected to deliver high quality electron beams for potential applic ations. However\, it requires high stability and reproducibility of the ej ected beam which are still far away from the current laser driven plasma a ccelerator.\nSupersonic nozzles are commonly used in LWFA to provide spati ally well-defined gas targets with a plateau density profile and sharp gas -vacuum boundaries. To maintain the reproducibility of the accelerated ele ctron beam\, a stable gas target in the vacuum chamber with precise densit y distribution profile is necessary. It guarantees that the laser-plasma i nteracts in a proper density region　and the relative laser focal point d oesn't shift too much from shot to shot. In this work\, we focus on the in stability originated from the gas jet due to the nonlinear fluid dynamics in the supersonic nozzle. The role of the stilling chamber in a modified C onverging-Diverging nozzle is investigated. According to the fluid dynamic s simulations\, the chamber dissipates the turbulence and stabilizes the g as jets. Via both the numerical simulations and the Mach-Zehnder interfero metric measurements\, the instability originated from the nonlinear turbul ence and the mechanism to suppress the instability are studied.\n\nReferen ces \n[1] Z. Lei\, et al.\, Rev. Sci. Instrum. 95\, 015111 (2024).\n[2] Z. Lei\, et al.\, High Power Laser Sci. Eng. 11\, e91 (2023).\n\nhttps://ind ico.nsrrc.org.tw/event/16/contributions/218/ LOCATION:Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/218/ END:VEVENT BEGIN:VEVENT SUMMARY:New beam loss monitor system at the Australian Synchrotron DTSTART;VALUE=DATE-TIME:20240417T055000Z DTEND;VALUE=DATE-TIME:20240417T061000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-188@indico.nsrrc.org.tw DESCRIPTION:Speakers: Xuanhao Zhang (Australian Synchrotron)\nA new beam l oss monitor (BLM) system has been installed and commissioned at the Austra lian Synchrotron. The new system consists of 28 beam loss detector (BLD) u nits and 14 signal processing BLM units distributed around the storage rin g. Each detector unit consists of a plastic scintillator coupled to a phot omultiplier tube. The signal processing units are Libera BLMs from Instrum entation Technology. The new system can detect both integrated slow losses from the stored beam and turn-by-turn losses during injection. This talk will describe the calibration method\, the commissioning results\, and imp lementation of a postmortem function to detect unexpected beam loss events .\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/188/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/188/ END:VEVENT BEGIN:VEVENT SUMMARY:Commissioning optics for low emittance rings DTSTART;VALUE=DATE-TIME:20240417T061000Z DTEND;VALUE=DATE-TIME:20240417T063000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-189@indico.nsrrc.org.tw DESCRIPTION:Speakers: Tessa Charles (Australian Synchrotron\, ANSTO)\nThe strive towards lower emittance in 4th generation light sources often restr icts the dynamic aperture and lifetime\, creating challenges for injection efficiency and commissioning. Once a circulating beam is established\, BP M calibration\, BBA and other optics corrections can be applied. However\, with a limited DA\, it can be difficult to establish a circulating beam a t the start of commissioning. To address this problem\, we have developed a lattice design that allows for both low emittance optics (for standard u ser beam operation) and what we have called “commissioning optics” whi ch is a set of lattice parameters that allows for larger dynamic aperture and Touschek Lifetime at the temporary cost of larger horizontal emittance .\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/189/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/189/ END:VEVENT BEGIN:VEVENT SUMMARY:Resonant Cherenkov diffraction radiation for the beam diagnostics DTSTART;VALUE=DATE-TIME:20240417T082000Z DTEND;VALUE=DATE-TIME:20240417T084000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-193@indico.nsrrc.org.tw DESCRIPTION:Speakers: Hiroyuki Hama (Tohoku University)\nWe have developed a periodic Cherenkov radiator to obtain narrow band Cherenkov radiation. Since the radiation spectrum of Cherenkov diffraction radiation from the r adiator contains strong higher order harmonics\, the bunch form factor of the electron beam is expected to be deduced precisely\, so that the very s hort bunch less than 10 fs (such as the laser wakefield accelerated beam) is able to be measured. We have done some test experiments with 100 fs bun ches at t-ACTS of Tohoku University. Some theoretical consideration and ex periments data together with discussions will be presented.\n\nhttps://ind ico.nsrrc.org.tw/event/16/contributions/193/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/193/ END:VEVENT BEGIN:VEVENT SUMMARY:Progress of HEPS Cryogenic System DTSTART;VALUE=DATE-TIME:20240418T055000Z DTEND;VALUE=DATE-TIME:20240418T061000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-233@indico.nsrrc.org.tw DESCRIPTION:Speakers: Rui Ge (IHEP， CAS)\nHigh Energy Photon Source (HEP S) is a high-performance and high-energy synchrotron radiation light sourc e with a beam energy of 6GeV and an ultra-low emittance of better than 0.0 6nm×rad. The HEPS is mainly composed of accelerator\, beamlines and end-s tations.The cryogenic system includes a helium refrigerator system and a n itrogen cryogenic plant. The helium refrigerator system has been consisted of a helium refrigerator on a capacity at 2000W@4.5K\, a cryogenic distri bution transfer system and helium recovery and purification system for 10 superconducting radio frequency cavity cryomodules. The pressure stability at ±1.50mbara of the low pressure in helium compressors has achieved\, w hich is a great significance to these superconducting radio frequency cavi ties. The nitrogen cryogenic plant is crucial for creating and maintaining operational conditions of the thermal shield of superconducting radio fre quency cavity cryomodules\, precooling the helium refrigerator coldbox\, c ooling photon beamline cryostats and cryogenic inserts in the HEPS. The ni trogen cryogenic plant has an average capacity about 50kW at 80K in the HE PS phase I. The nitrogen cryogenic plant is mainly included of nitrogen cy cle refrigerator system at 7000W@90K and 100Nm3/h\, two liquid nitrogen ta nks and cryogenic fluid distribution tube network. The HEPS project engine ering implementation has started at June 2019 and will be finished in the end of 2025. The Schematic diagram\, status and recent machines commission ing of the cryogenic system are described in this paper.\n\nhttps://indico .nsrrc.org.tw/event/16/contributions/233/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/233/ END:VEVENT BEGIN:VEVENT SUMMARY:Laser polarimeter for measuring the beam energy of the VEPP-4M acc elerator using the resonant depolarization method DTSTART;VALUE=DATE-TIME:20240417T082000Z DTEND;VALUE=DATE-TIME:20240417T084000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-183@indico.nsrrc.org.tw DESCRIPTION:Speakers: Ivan Nikolaev (Budker Institute of Nuclear Physics)\ nThe KEDR detector at the VEPP-4M accelerator complex plans to measure the mass\nof the Y(1S) meson with an accuracy better than 50 keV. This experi ment\nrequires precision measurement of the beam energy. The most accurate method of\nmeasuring beam energy is the resonance depolarization method. The method is\nbased on the connection of the particle energy with the spi n precession\nfrequency\, which is determined by the destruction of the be am polarization in\nthe presence of an alternating electromagnetic field. The polarization of the\nbeam is measured by the asymmetry of the Compton backscattering of\ncircularly polarized photons on transversely polarized electrons. The report is\ndevoted to the description of the "Laser Polarim eter" facility and the\nfeatures of beam energy measurement. An Nd:YLF las er with a wavelength of 527\nnm and an average power of 2 watts is used as a photon source. The\nbackscattered gamma quanta are detected using a two -coordinate detector based\non triple GEM. The laser polarimeter allows me asuring the energy of the VEPP-4M beam\nwith an accuracy of about 15 keV i n 30 minutes directly during the data collecting by the KEDR detector.\n\n https://indico.nsrrc.org.tw/event/16/contributions/183/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/183/ END:VEVENT BEGIN:VEVENT SUMMARY:Fluorescence diamond EUV/soft X-ray imaging sensor development DTSTART;VALUE=DATE-TIME:20240418T053000Z DTEND;VALUE=DATE-TIME:20240418T055000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-164@indico.nsrrc.org.tw DESCRIPTION:Speakers: Teng-I Yang (Taiwan Instrument Research Institute)\n We have achieved a groundbreaking demonstration of utilizing FNDs as scint illators for imaging synchrotron-based EUV radiation. The carbon-based sci ntillator comprises an ensemble of NV0 centers serving as the primary sour ce of light emission upon above-bandgap excitation (energy > 5.47 eV or wa velength \n\nhttps://indico.nsrrc.org.tw/event/16/contributions/164/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/164/ END:VEVENT BEGIN:VEVENT SUMMARY:MPGD Production capability and R&D plan in Korea DTSTART;VALUE=DATE-TIME:20240418T071000Z DTEND;VALUE=DATE-TIME:20240418T073000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-198@indico.nsrrc.org.tw DESCRIPTION:Speakers: Inseok Yoon (Seoul National University)\nKorea CMS i s one of the only two organizations\, along with CERN micro pattern techno logy workshop\, capable of producing large GEM foils\, playing a crucial r ole in the CMS GEM upgrade. To achieve this\, it has built the world's fir st large GEM production facility using the double-mask etching technology\ , which is suitable for faster production. The validation results and mass production progress of GEM foils produced in Korea will be reported. Addi tionally\, R&D plan for the production of uRWELL\, the next-generation mic ro pattern gaseous detector\, by expanding the established capabilities wi ll be presented. This R&D effort aims to supply uRWELL for the DAMSA exper iment\, a new venture in search for axion-like particle and dark photon\, with the potential to also contribute to the ePIC experiment.\n\nhttps://i ndico.nsrrc.org.tw/event/16/contributions/198/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/198/ END:VEVENT BEGIN:VEVENT SUMMARY:Present status of a compact superconducting accelerator for heavy- ion therapy. DTSTART;VALUE=DATE-TIME:20240417T032000Z DTEND;VALUE=DATE-TIME:20240417T034000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-185@indico.nsrrc.org.tw DESCRIPTION:Speakers: Shunya Matsuba (National Institutes for Quantum Scie nce)\nNational Institutes for Quantum Science and Technology (QST\, succes sor organization of National Institutes for Radiological Science) started carbon ion particle therapy in 1994. \n Based on positive clinical results \, carbon-ion radiotherapy was authorized as a Highly Advanced Medical Tec hnology by Japanese government from 2003 and treatment for some kinds of c ancers was applied to Japanese National Health Insurance system from 2016. \n In addition\, developments of compact accelerator for widespread use of carbon-ion radiotherapy was conducted from 2004. As a results\, five faci lities based on these studies were constructed in Japan and several abroad .\n However\, construction is limited to universities and large hospitals\ , and downsizing of accelerator is needed for more widespread use. Therefo re\, a new project\, so called “Quantum Scalpel”\, has been launched f or development of more compact accelerator. In this project\, a synchrotro n will be downsized using combined-function superconducting magnets for ma in dipoles. At present\, construction of a compact superconducting synchro tron is currently underway. In this presentation\, the outline and present status of the project and R&D results of the superconducting synchrotron are presented.\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/185/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/185/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of the Liquid Nitrogen Transfer line for TPS Beamline Endstation DTSTART;VALUE=DATE-TIME:20240418T071000Z DTEND;VALUE=DATE-TIME:20240418T073000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-237@indico.nsrrc.org.tw DESCRIPTION:Speakers: Wun-Rong Liao (NSRRC)\nIn 2015\, Taiwan Photon Sourc e (TPS) successfully completed a significant project involving the install ation of a crucial 600-meter-long liquid nitrogen (LN2) transfer line spec ifically designed for beamline endstations. This line previously supplied liquid nitrogen to a maximum of 24 beamline endstations. Subsequently\, in 2018 and 2019\, Beamline Endstation 13A was inaugurated\, focusing on adv anced and general studies of biological structures and structural kinetics in solution or condensed forms under environmental simulations. The resea rch spans from atomic to micrometer scales with a time resolution ranging from microseconds to minutes. To meet the specific requirements of Beamlin e Endstation 13A\, we independently designed and manufactured a dedicated LN2 transfer line to supply liquid nitrogen to the double-crystal monochro mator (DCM)\, effectively addressing crystal thermal deformation issues. A dditionally\, we innovatively designed a keep-full device to replace the p hase separator of the chiller. This paper will provide a detailed introduc tion to various aspects of this transfer line\, including pipeline design\ , performance testing\, the keep-full device\, pressure reducer\, noise re duction measures\, and heat-load measurements.\n\nhttps://indico.nsrrc.org .tw/event/16/contributions/237/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/237/ END:VEVENT BEGIN:VEVENT SUMMARY:Evaluation of the wakefield effects caused by the orbit fluctuatio n on the nanometer small beam at ATF DTSTART;VALUE=DATE-TIME:20240417T053000Z DTEND;VALUE=DATE-TIME:20240417T055000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-192@indico.nsrrc.org.tw DESCRIPTION:Speakers: Yuki Abe (KEK)\nFor demonstrating the beam focusing scheme required for linear colliders\, the Accelerator Test Facility (ATF) at KEK is designed to focus an electron beam to 37 nm vertical size at th e virtual interaction point (IP) utilizing the low emittance beam (vertica l emittance: 12~pm.rad) generated in the damping ring. Because of the spec ial focusing beam optics\, even small angle changes of beam particles in t he beamline can cause significant distortions at IP. The transverse wakefi eld effects have been observed as beam size growth depending on the beam i ntensity at ATF. In this report\, we describe the wakefield affection on t he beam size at IP with pulse-by-pulse beam orbit fluctuations. Simulation and experiments in the final focus beam line of ATF\, which have confirme d the effect\, are also reported.\n\nhttps://indico.nsrrc.org.tw/event/16/ contributions/192/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/192/ END:VEVENT BEGIN:VEVENT SUMMARY:Detector development of the Beam Expansion Application at CSNS DTSTART;VALUE=DATE-TIME:20240417T092000Z DTEND;VALUE=DATE-TIME:20240417T094000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-197@indico.nsrrc.org.tw DESCRIPTION:Speakers: You Lyu ()\nThe China Spallation Neutron Source (CSN S) was completed in March 2018\, and it is the first spallation neutron so urce in China. The CSNS project plans to construct four beamlines for beam expansion applications\, including a back-streaming white neutron beamlin e\, a medium-energy proton beamline\, a high-energy proton beamline\, and a surface muon beamline. Around these four beamlines\, we have developed a series of detectors for use in various experiments\, including beam monit oring\, beam profile measurement\, charged particle detection\, etc. All t hese detectors will be briefly presented in this report\, with a particula r focus on the TPC used for neutron-induced secondary cross-section measur ement and the B-MCP detector for neutron resonance photography.\n\nhttps:/ /indico.nsrrc.org.tw/event/16/contributions/197/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/197/ END:VEVENT BEGIN:VEVENT SUMMARY:Research and Development of industrialization of module assembly f or the ALICE 3 Outer Tracker DTSTART;VALUE=DATE-TIME:20240418T061000Z DTEND;VALUE=DATE-TIME:20240418T063000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-202@indico.nsrrc.org.tw DESCRIPTION:Speakers: Jiyoung Kim (Inha University (KR))\nALICE 3 is the n ext-generation heavy-ion experiment proposed for the LHC Run 5 and 6. Its tracking system will be based on a vertex detector\, integrated into a ret ractable structure inside the beam pipe to achieve the best possible point ing resolution\, and a large outer tracker\, surrounding the vertex detect or and covering about eight units of pseudorapidity ($|\\eta|\n\nhttps://i ndico.nsrrc.org.tw/event/16/contributions/202/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/202/ END:VEVENT BEGIN:VEVENT SUMMARY:Design study of a high-current Q/A=1/2 K100 compact cyclotron for multi-disciplinary utilization DTSTART;VALUE=DATE-TIME:20240417T055000Z DTEND;VALUE=DATE-TIME:20240417T061000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-163@indico.nsrrc.org.tw DESCRIPTION:Speakers: Jong-Won Kim (Institute for Basic Science (IBS))\nMa gnetic design and beam optics studies have been carried out for a K100 cyc lotron\, which can accelerate Q/A=1/2 ions to the maximum energy of 25 MeV /u. Since proton acceleration using H2+ instead of H+ or H- can double the maximum beam current primarily limited by space charge effects at the inj ection energy of compact cyclotron\, we expect a maximum current of over 2 mA can be achieved by existent cyclotron technology. In addition\, D+\, H e2+ can be accelerated with slight adjustments of rf frequency so as to pr oduce fast neutrons and medical isotopes such as 211At for advanced cancer therapy. Also\, we consider employing a charge stripping method to extrac t H2+ at an energy of around 10 MeV to produce low-energy neutrons more op timally. I will present major features of the cyclotron design.\n\nhttps:/ /indico.nsrrc.org.tw/event/16/contributions/163/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/163/ END:VEVENT BEGIN:VEVENT SUMMARY:Mitigating Thermoacoustic Phenomena in Cryogenic Helium Distributi on System DTSTART;VALUE=DATE-TIME:20240418T090000Z DTEND;VALUE=DATE-TIME:20240418T092000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-236@indico.nsrrc.org.tw DESCRIPTION:Speakers: Hsing-Chieh Li (NSRRC)\nIn the operation of the cryo genic helium distribution system for TPS superconducting radio frequency ( SRF) cavities\, thermal acoustic oscillations (TAOs) frequently arise\, ca using pressure fluctuations in the cold helium gas processing lines\, reac hing up to 65 mbar. These TAOs introduce an additional heat load\, impacti ng the operational stability of the SRF cavities. To address this issue\, three gas buffers were affixed to the exhaust pipelines of the helium gas processing lines. The isolation valve of the gas buffers was maintained at a halfway position to mitigate pulsations in the flow. Remarkably\, these buffers effectively quelled the TAO phenomena without necessitating modif ications to the exhaust pipelines. Consequently\, pressure fluctuations we re substantially diminished\, not exceeding 7 mbar\, thereby meeting the o perational requirements for the SRF cavities. This paper presents and deli berates on the implemented solution for mitigating thermoacoustic phenomen a within the cryogenic distribution system.\n\nhttps://indico.nsrrc.org.tw /event/16/contributions/236/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/236/ END:VEVENT BEGIN:VEVENT SUMMARY:Ultra-high-brightness Photon Sources driven by Dielectric Laser Ac celerator DTSTART;VALUE=DATE-TIME:20240418T014000Z DTEND;VALUE=DATE-TIME:20240418T022000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-246@indico.nsrrc.org.tw DESCRIPTION:Speakers: Yen-Chieh Huang ()\nThe acceleration gradient of a s olid-state accelerator is limited by the damage of the acceleration field on an accelerator structure. A dielectric\, which is widely used for high- power lasers\, is therefore the choice of material for an accelerator oper ating at the optical frequencies. Owing to the much shorter drive waveleng th\, a dielectric laser accelerator (DLA) built upon a photonic chip could produce nano-electron bunches useful for studying attosecond science or g enerating electron superradiance in the EUV and soft x-ray spectrum. We sh ow in this presentation that\, in the low-current limit\, a DLA-driven pho tonic chip can generate laser-like radiation from a single electron and a train of single electrons\; where\, with ~fC bunch charge\, DLA-driven coh erent undulator radiation is the brightest photon source on Earth when the brilliance of radiation per beam power is considered.\n\nhttps://indico.n srrc.org.tw/event/16/contributions/246/ LOCATION:Activity Center Room D260 URL:https://indico.nsrrc.org.tw/event/16/contributions/246/ END:VEVENT BEGIN:VEVENT SUMMARY:Precision Timing at High-Luminosity LHC with the CMS MIP Timing De tector DTSTART;VALUE=DATE-TIME:20240418T034000Z DTEND;VALUE=DATE-TIME:20240418T040000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-200@indico.nsrrc.org.tw DESCRIPTION:Speakers: Chang-Seong MOON (Kyungpook National University)\nTh e MIP Timing Detector (MTD) is a new sub-detector planned for the Compact Muon Solenoid (CMS) experiment at CERN\, aimed at maintaining the excellen t particle identification and reconstruction efficiency of the CMS detecto r during the High-Luminosity LHC (HL-LHC) era. The MTD will provide new an d unique capabilities to CMS by measuring the time-of-arrival of minimum i onizing particles with a resolution of 30 - 40 ps at the beginning of HL-L HC operation. The information provided by the MTD will help disentangle ~2 00 nearly simultaneous pileup interactions occurring in each bunch crossin g at LHC by enabling the use of 4D reconstruction algorithms. The MTD will be composed of an endcap timing layer (ETL)\, instrumented with low-gain avalanche diodes\, as well as a barrel timing layer (BTL)\, based on LYSO: Ce crystals coupled to SiPMs. In this talk\, we will present an overview o f the MTD design\, highlight the new physics capabilities provided by the MTD\, describe the latest progress toward production\, and show test beam results demonstrating the achieved target time resolution.\n\nhttps://indi co.nsrrc.org.tw/event/16/contributions/200/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/200/ END:VEVENT BEGIN:VEVENT SUMMARY:Present and Future of Pohang Accelerator Laboratory DTSTART;VALUE=DATE-TIME:20240418T010000Z DTEND;VALUE=DATE-TIME:20240418T014000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-245@indico.nsrrc.org.tw DESCRIPTION:Speakers: Heung-Sik Kang (Pohang Accelerator Laboratory)\nPAL\ , established in 1988 with full support from the Pohang University of Scie nce and Technology\, has acted as a powerhouse to support basic science an d technology in Korea and has secured a competitive edge frontier after ma king ceaseless efforts. PAL is now operating PLS-II and PAL-XFEL.\n\nPLS-I I is the 3-rd generation synchrotron with 3-GeV beam energy and 5.8 nm emi ttance. Thirty-six beamlines are operational for user-service operation. P AL-XFEL is a hard X-ray free-electron laser facility based on 10-GeV norma l conducting linac. One hard X-ray and a soft X-ray FEL are operational fo r user-service operation.\n\nThe PAL-XFEL has demonstrated excellent timin g stability and unprecedented peak brightness since its start of user serv ice operation in June 2017\, outperforming other XFEL facilities worldwide . The 18-fs timing stability in the XFEL allows excellent pump-probe time- resolved experiments with low-timing jitter. A self-seeding scheme enables us to produce a higher peak brightness of the XFEL with a narrow bandwidt h: the peak brightness of 3.2 x 1035 photons/(s·mm2·mrad2·0.1%BW) at 9. 7 keV and the bandwidth of 0.19 eV\, the best to date. To provide more bea mtime to users\, we started the 2nd hard X-ray FEL line project in 2024 an d will finish it by 2027.\n\nFor our current or potential scientific users \, we will continue to strengthen our capacity\, scientific programs\, and industry engagement and maximize our impact as a major contributor to the cutting-edge future of science in Korea.\n\nhttps://indico.nsrrc.org.tw/e vent/16/contributions/245/ LOCATION:Activity Center Room D260 URL:https://indico.nsrrc.org.tw/event/16/contributions/245/ END:VEVENT BEGIN:VEVENT SUMMARY:Laser driven Ion Acceleration by Hybrid Scheme Using Dual laser Pu lses for NCU 100 TW Laser System DTSTART;VALUE=DATE-TIME:20240417T032000Z DTEND;VALUE=DATE-TIME:20240417T034000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-162@indico.nsrrc.org.tw DESCRIPTION:Speakers: Yao-Li Liu ()\nBased on the NCU 100-TW laser system\ , we use the hybrid scheme\, proposed by Isayama et al\, using dual laser pulses to drive 53 MeV protons. The dual pulses are identical (810-nm wave length\, 1.5-J energy\, 30-fs pulse duration\, and 5-micron spot size). Th e target is composed of a solid-density target and a near-critical density target.\nThis hybrid scheme combines the three typical schemes: RPA\, LWF A\, and TNSA. Under this scheme\, the proton is first accelerated by RPA a nd then injected into the near-critical density target. After that\, the s econd pulse generates wakefields in the near-critical density target to pr ovide the secondary acceleration of the proton. In the third phase\, the h ot electrons are generated in the target's rear so that the sheath field c an enhance the proton energy by TNSA.\n\nhttps://indico.nsrrc.org.tw/event /16/contributions/162/ LOCATION:Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/162/ END:VEVENT BEGIN:VEVENT SUMMARY:R&D of Barrel Imaging Calorimeter for the ePIC experiment DTSTART;VALUE=DATE-TIME:20240418T055000Z DTEND;VALUE=DATE-TIME:20240418T061000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-201@indico.nsrrc.org.tw DESCRIPTION:Speakers: Jeongsu Bok (Pusan National University)\nElectron-Io n Collider (EIC) is a new collider to explore the fundamental structure an d dynamics of matter in the visible world. The EIC project includes a gene ral-purpose detector: The ePIC Detector. The unique physics goals at the E lectron-Ion Collider lead to specific design considerations for the electr omagnetic calorimeter in the barrel region. The Barrel Imaging Calorimeter comprises silicon layers using the AstroPix sensors for position measurem ent\, and bulk Pb-SciFi layers for energy measurement. Precise measurement of electron energy and shower profile will enable us to distinguish elect rons from pions and to identify photons from pion decays. This talk will p rovide a plan and current R&D effort from Korean institutions for the ePIC Barrel Imaging Calorimeter. Korean institutions plan to contribute to the mass chip test and module assembly of the silicon layers. In addition\, t he production of a Pb-SciFi prototype is ongoing for further study includi ng readout box\, calibration\, and integration with a silicon layer.\n\nht tps://indico.nsrrc.org.tw/event/16/contributions/201/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/201/ END:VEVENT BEGIN:VEVENT SUMMARY:R&D of Fast Timing Multi Anode MCP-PMT for Radiation Imaging DTSTART;VALUE=DATE-TIME:20240418T084000Z DTEND;VALUE=DATE-TIME:20240418T090000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-181@indico.nsrrc.org.tw DESCRIPTION:Speakers: Ma Lishuang (IHEP，CAS)\nThe time performance of ph otodetector is a critical parameter for the development of Radiation Imagi ng Detectors based on time of flight (TOF) technique\, for example TOF pos itron emission tomography (TOF-PET). In 2020\, the proposal of roadmap tow ard the 10 ps TOF-PET challenge places higher requirement on the time perf ormance of the photodetector. Microchannel Plate Photomultiplier (MCP-PMT) is a popular candidate photodetector of TOF-PET for its high gain\, good detection efficiency\, single photon detect ability\, magnetic field resis tance\, ultimately its good time resolution and spatial resolution. \nThis manuscript introduces the R&D of fast timing MCP-PMT with 8*8 anodes with a rise time (RT) less than 300 ps and Transit time spread (TTS) less than 40 ps under single photon mode. In addition to the performance evaluation of the MCP-PMT itself\, the performance of this kind of MCP-PMT coupled w ith crystal array also be calibrated under proton and neutron beam respect ively\, including the energy resolution and uniformity\, the time resoluti on and uniformity. The experiment is in progress\, and the relevant result s are being analysed step by step\, and the full results will be presented in a formal report or article.\n\nhttps://indico.nsrrc.org.tw/event/16/co ntributions/181/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/181/ END:VEVENT BEGIN:VEVENT SUMMARY:Research and Development of the ALICE Inner Tracking System 3 in K orea DTSTART;VALUE=DATE-TIME:20240418T040000Z DTEND;VALUE=DATE-TIME:20240418T042000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-203@indico.nsrrc.org.tw DESCRIPTION:Speakers: Jiyoung Kim (Inha University (KR))\nThe ALICE (A Lar ge Ion Collider Experiment) collaboration is gearing up for an upgrade of the Inner Tracking System (ITS2) during the LHC Long Shutdown 3 (2026 - 20 28). The upgrade will replace the three innermost layers of ITS2 with a tr uly cylindrical vertex detector\, ITS3. This innovative tracker is compose d of a 65 nm CMOS Monolithic Active Pixel Sensor (MAPS) employing stitchin g technology to produce a large sensor size O(10 x 26 cm$^{2}$). Its ultra -thin thickness\, O(20 - 50 $\\mu$m)\, allows flexibility to be bent into a half-cylindrical shape without additional supporting material. Finally\, the three layers of the tracker consist of only six silicon sensors and l ight carbon forms to hold each layer to keep it in shape and location. \n\ nThis detector configuration of ITS3 can reduce the material budget to 0.0 7\\% X$_{0}$ per layer. As a result\, it foresees the tracking performance \, in particular at low transverse momentum ($p_{\\text{T}} >$ 0.1 GeV/\\t extit{c})\, is improved by a factor of 2 to the current ITS2. The developm ent and validation of the sensor technology are in progress\, with the pro totype sensors from the first and the second test production runs: Multi-r eticle-Layer Run 1 (MLR1) and Engineering Run 1 (ER1). Sensor design and i ts characteristics fabricated with 65 nm CMOS technology are the main inte rests in MLR1 prototypes whereas the validation of stitching technology is a crucial task in the R\\&D with the ER1 ones.\n\nThis talk will introduc e the design and structure of ITS3 and discuss extensive R\\&D for bent MA PS detectors focusing on the Korean ALICE ITS3 team's activities.\n\nhttps ://indico.nsrrc.org.tw/event/16/contributions/203/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/203/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutron Detection Study from Beam test of Boron GEM detector DTSTART;VALUE=DATE-TIME:20240418T082000Z DTEND;VALUE=DATE-TIME:20240418T084000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-207@indico.nsrrc.org.tw DESCRIPTION:Speakers: WooJong Kim (University of Seoul)\nThe GEM neutron d etector incorporates a layer of boron for neutron capture.\nThe aim is to offer more cost-effective and larger-scale coverage for neutron detection compared to conventional cold neutron detectors. \nWe present the results of the beam test using cold neutrons (10 meV) at HANARO (High-Flux Advance d Neutron Application Reactor)\, analyzing the hit positions of the neutro n beam and the signal waveform.\n\nhttps://indico.nsrrc.org.tw/event/16/co ntributions/207/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/207/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of silicon radiation detectors for therapeutic and spa ce applications DTSTART;VALUE=DATE-TIME:20240417T034000Z DTEND;VALUE=DATE-TIME:20240417T040000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-216@indico.nsrrc.org.tw DESCRIPTION:Speakers: Anatoly Rosenfeld (CMRP\, School of Physics\, Univer sity of Wollongong\, Australia)\nCentre for Medical Radiation Physics at U niversity of Wollongong has long history of development of the silicon rad iation detectors for dosimetry in X-ray and particle radiation therapy. Ov erview of the developed pixelated Si detectors and their applications for high spatial and temporal resolution dosimetry on medical linac and on pro ton and heavy ion therapy will be presented.\n\nProgress in development of SOI detectors for microdosimetry and their application for RBE study of t he proton and heavy ions therapeutic beams in clinical setting will be dem onstrated. \n\nAnother application of SOI microdosimeter is for evaluatio n of radiation shielding and radiation protection of astronauts in radiati on environment typical for SPE and GCR. We demonstrated that SOI microdosi meters are suitable for in situ evaluation of radiation shielding efficien cy of multi-layered space craft and astronaut shelter walls in radiation f ields on accelerators mimicking SPE and GCR. Comparison of SOI microdosime ters with Timepix detector for biologically relevant dosimetry for astrona uts radiation protection in GCR environment will be presented.\n\nSOI mic rodosimeters have found application for wide range LET verification of ion s on accelerators for Single Even Effect (SEE) studies in microelectronics including at CERN for high LET ions like 1GeV/u Pb. Development of Si sen sors for displacement damage monitoring of space electronics will be discu ssed.\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/216/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/216/ END:VEVENT BEGIN:VEVENT SUMMARY:Assessing Wake-T as a lightweight simulation tool for beam driven plasma wakefields\, with applications to compact particle accelerators. DTSTART;VALUE=DATE-TIME:20240418T055000Z DTEND;VALUE=DATE-TIME:20240418T061000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-221@indico.nsrrc.org.tw DESCRIPTION:Speakers: Theo Williams (James Cook University)\nPlasma wakefi eld acceleration is a promising technology for compact particle accelerati on\, experimental results demonstrating a high-quality beam reaching 1GeV energy in just 3.3cm [1]. Simulations are a key tool used to develop our u nderstanding of plasma wakefield technologies\, however\, conventional par ticle-in-cell (PIC) codes can be arduous to run\, requiring significant co mputing power. \n\nWake-T is a lightweight alternative to other PIC codes\ , boasting the ability to run these simulations in just minutes on a lapto p\, by considering simplified models for the plasma wakefields rather than computing full PIC plasma simulations [2]. This study assesses the use of Wake-T for simulating beam-driven plasma wakefields\, with a focus on lon g drive-beams. The results are benchmarked against existing results [3\, 4 \, 5] done using the spectral\, quasi-cylindrical code FBPIC\, which compu tes the full PIC simulation for the background plasma [6]. We also assess the functionality of Wake-T to perform sweeping parameter scans that would otherwise be prohibitively computationally expensive\, to further analyse relationships between initial beam-plasma parameters and the development and evolution of the plasma wakefields and the particle beam.\n\nIn this w ork\, we leverage Wake-T simulations to investigate the effect of the init ial beam properties (i.e. size and emittance)\, and the effect of backgrou nd plasma density and profile on the mutual evolution of the plasma wakefi elds and particle beam. Consideration is also given to long-drive beams wi th beam lengths in the millimetre range and much longer than the plasma wa velength\, such as those commonly sourced from thermionic RF or DC guns.\n \n[1] W. P. Leemans\, et al.\, Nature Physics 2\, 696–699 (2006).\n\n[2] A. Ferran Pousa\, R. Assmann\, A. Martinez de la Ossa\, Journal of Physic s: Conference Series 1350\, 012056 (2019).\n\n[3] O. Jakobsson\, et al.\, Plasma Physics and Controlled Fusion 61\, 124002 (2019).\n\n[4] M. Gross\, et al.\, Nuclear Instruments and Methods in Physics Research Section A: A ccelerators\, Spectrometers\, Detectors and Associated Equipment 740\, 74 (2014).\n\n[5] K. Moon\, J. Jeong\, C. Sung\, M. Chung\, Journal of the Ko rean Physical Society 83\, 614 (2023).\n\n[6] R. Lehe\, M. Kirchen\, I. A. Andriyash\, B. B. Godfrey\, J.-L. Vay\, Computer Physics Communications 2 03\, 66 (2016).\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/221/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/221/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of new optical readout concept in the visible range fo r dark matter detectors DTSTART;VALUE=DATE-TIME:20240418T065000Z DTEND;VALUE=DATE-TIME:20240418T071000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-204@indico.nsrrc.org.tw DESCRIPTION:Speakers: Vladislav Oleynikov (Budker INP)\nLiquid argon detec tors are used in a variety of fundamental physical experiments\, such as d ark matter searches and neutrino studies. The use of argon as a target med ium is largely due to its high light yield. However\, the maximum emission intensity occurs at a wavelength of 128 nm\, which is difficult to detect with high efficiency. The standard solution is to use wavelength shifter\ , which re-emits 128 nm into the visible range\, but it has its own drawba cks. In this paper\, an alternative readout concept is considered\, namely light readout in the visible and infrared range without wavelength shifte r. The results of measurements of the light yield of primary scintillation s (S1) in liquid phase and electroluminescence (S2) in gaseous phase in pu re argon and their mixtures with methane are presented. Possible applicati ons of this new readout concept in dark matter detectors and neutron veto detectors are also discussed.\n\nhttps://indico.nsrrc.org.tw/event/16/cont ributions/204/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/204/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of micro-pattern gaseous TPC for direction-sensitive d ark matter search DTSTART;VALUE=DATE-TIME:20240418T080000Z DTEND;VALUE=DATE-TIME:20240418T082000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-206@indico.nsrrc.org.tw DESCRIPTION:Speakers: Satoshi Higashino (Kobe University)\nThe sensitivity of the direct dark matter search is being improved by various energy-sens itive experiments such as XENONnT\, LZ\, Panda-X and so on. On the other h and\, in order to reveal properties of the dark matter particle after its discovery or to explore beyond the neutrino-fog region\, direction-sensiti ve dark matter search is designed and taken place recently.The 3D tracking technology of nuclear recoils induced by dark matters allows to measure t he directionality of dark matters.One of the method to reconstruct nuclear recoils' track is the use of low-pressure gaseous TPC with micro-pattern readout.In this talk\, we report the recent activities of the development of low-pressure gaseous TPC's used for direction-sensitive direct dark mat ter searches in the world\, especially for our experiment: NEWAGE.\n\nhttp s://indico.nsrrc.org.tw/event/16/contributions/206/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/206/ END:VEVENT BEGIN:VEVENT SUMMARY:Design and Construction of a 1.5-GHz Two-Cell SRF Module in NSRRC DTSTART;VALUE=DATE-TIME:20240418T084000Z DTEND;VALUE=DATE-TIME:20240418T090000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-239@indico.nsrrc.org.tw DESCRIPTION:Speakers: Chih-Hung Lo ()\nA two-cell 1.5-GHz superconducting radio-frequency (SRF) cavity was designed and optimized by NSRRC previousl y\, and then manufactured by Mitsubishi Heavy Industry Machinery Systems ( MHI MS)\, Japan. Following post processes on this SRF cavity such as elec trical polishing (EP)\, annealing\, and pre-tuning\, had been finished in KEK\, Japan in 2023 under a cooperation agreement between NSRRC and KEK. This SRF cavity’s frequency of pi-mode was successfully tuned to the exp ected frequency range\, by applying a longitudinal displacement on its str ucture to elastoplastic range. It is the first time to practically tune t he resonance frequency of an SRF cavity with its interior in vacuum\, as t o eliminate the effect of air’s permittivity on measured resonance frequ ency. Meanwhile\, the cryostat for this SRF cavity was designed by NSRRC and contracted to local companies. The helium vessel has been delivered a nd passed the cold shock and helium leaking test\, whereas the vacuum vess el is still in production. The higher-order-mode (HOM) damper is contract ed to Research Instruments (RI)\, Germany and shall be delivered in 2024. It is expected to finish the vertical test of this SRF cavity in 2024 and the module assembly in 2025. Installation\, system integration\, and bea m commissioning are scheduled in 2025-2026. The bunch length of stored el ectron beam in Taiwan Photon Source (TPS) is expected to increase with a f actor of 1.6 to raise the beam life time and to reduce the beam-induced he at on the magnet arrays of the in-vacuum undulators.\n\nhttps://indico.nsr rc.org.tw/event/16/contributions/239/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/239/ END:VEVENT BEGIN:VEVENT SUMMARY:Design and Implementation of accelerator control system for D-BNCT DTSTART;VALUE=DATE-TIME:20240417T082000Z DTEND;VALUE=DATE-TIME:20240417T084000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-210@indico.nsrrc.org.tw DESCRIPTION:Speakers: Xuan Wu (IHEP\, CAS)\nIn recent years\, Boron Neutro n Capture Therapy (BNCT) has seen vigorous development\, and the BNCT faci lity (D-BNCT) at the People's Hospital of Dongguan City\, Guangdong Provin ce\, is also under construction. This report introduces the design and imp lementation of the accelerator control system for D-BNCT\, which utilizes the Experimental Physics and Industrial Control System (EPICS) as the soft ware platform. has achieved remote control and status monitoring of the ac celerator equipment\, as well as interfaces with the treatment control sys tem. The system has been installed and is currently undergoing joint commi ssioning with the treatment control system.\n\nhttps://indico.nsrrc.org.tw /event/16/contributions/210/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/210/ END:VEVENT BEGIN:VEVENT SUMMARY:Local Engagement of Network & Grid Computing in Taiwan DTSTART;VALUE=DATE-TIME:20240417T092000Z DTEND;VALUE=DATE-TIME:20240417T094000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-258@indico.nsrrc.org.tw DESCRIPTION:Speakers: YUAN CHAO (Department of physics\, National Taiean U niversity)\nWe’d like to talk about the status and prospect on the resea rch network and grid computing for high energy physics studies in Taiwan.\ n\nhttps://indico.nsrrc.org.tw/event/16/contributions/258/ LOCATION: Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/258/ END:VEVENT BEGIN:VEVENT SUMMARY:Creating an asymmetric density profile in a sub-mm nitrogen gas je t to enhance the performance of few-TW laser wakefield acceleration DTSTART;VALUE=DATE-TIME:20240417T071000Z DTEND;VALUE=DATE-TIME:20240417T073000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-180@indico.nsrrc.org.tw DESCRIPTION:Speakers: Dang Khoa Tran (National Tsing Hua University\, Taiw an)\nFabricating a thin\, dense gas target capable of providing a plasma e lectron density of > 10^{19} cm^{-3} enables the operation of laser wakefi eld acceleration (LWFA) with few-TW or even sub-TW pulses\, as a strong la ser intensity can be achieved for the self-focused and self-modulated pump pulse to drive plasma waves for electron acceleration. The high plasma de nsity used here\, however\, results in a short dephasing length of \n\nhtt ps://indico.nsrrc.org.tw/event/16/contributions/180/ LOCATION:Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/180/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of the detectors and conducting experiments with Tunk a-Grande and TAIGA-Muon scintillation detectors arrays DTSTART;VALUE=DATE-TIME:20240417T080000Z DTEND;VALUE=DATE-TIME:20240417T082000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-205@indico.nsrrc.org.tw DESCRIPTION:Speakers: E.A. Kravchenko (Novosibirsk State University/ Budke r Institute of Nuclear Physics)\nTunka-Grande and TAIGA-Muon are scintilla tion detector arrays that are part of the TAIGA gamma observatory located near Lake Baikal. TAIGA is a hybrid complex of different systems located o n an area of 1 km2 and detecting simultaneously secondary charged particle s and Cherenkov light produced by extensive air showers (EAS). The experim ental scientific program covers gamma-ray astronomy\, cosmic ray physics a nd astroparticle physics. \nTunka-Grande scintillation array was put into service at the end of 2015. It consists of 19 stations each equipped with 12 surface and 8 underground detectors with the area 0.64 m^2. The energy range of Tunka-Grande array is 10^16–10^18 eV. The latest experimental r esults on the search for diffuse gamma radiation will be presented. \nTo e xpand the energy range of the experiment to 10^15 eV\, it was decided to s upplement the existing detector system with a new TAIGA-muon installation. For this purpose\, the new scintillation detectors of large area (0.96 m^ 2) were developed. These detectors use wavelength shifting light guides fo r the collection of scintillation light on the PMT. The original design he lped to minimize the thickness of the scintillator in the counter and allo wed to use small PMTs in the detector. All these minimize the cost of the counter. At the moment\, 5 new TAIGA-Muon stations have been installed. On e station comprises 20 underground and 4 surface detectors. The 4 remainin g consist of only 8 surface detectors. This summer all of them will be equ ipped with underground detectors. The scientific program of the upgraded s cintillation arrays includes the search for diffuse gamma radiation in the extended energy region\, study of the mass composition of cosmic rays and search of multi-messenger events in coincidence with other astroparticle experiments.\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/205/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/205/ END:VEVENT BEGIN:VEVENT SUMMARY:Linac-based Intense Coherent THz Sources Developed for User Applic ations DTSTART;VALUE=DATE-TIME:20240417T090000Z DTEND;VALUE=DATE-TIME:20240417T092000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-213@indico.nsrrc.org.tw DESCRIPTION:Speakers: Ming-Chang Chou (NSRRC)\nLinac-based coherent THz ra diation sources are being developed with the NSRRC high brightness photoin jector which has been installed in the Accelerator Test Area (ATA). The in jector is equipped with a laser-driven photocathode rf gun and a 5.2-m lon g S-band traveling-wave linac for beam acceleration. A 25 MeV beam of bunc h length as short as 240 fs has been produced from this injector by the so -called velocity bunching technique. Narrow-band superradiant THz radiatio n of pulse energy as high as 20 μJ and tunable central frequency from 0.6 to 1.4 THz can be generated by injecting such ultrashort beam into a U100 planar undulator. The intense THz light source will be a useful tool for applications such as material science and biomedical imaging. A THz user b eamline is under designed and construction and expected to open for users by the end of 2025.\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/ 213/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/213/ END:VEVENT BEGIN:VEVENT SUMMARY:Helium Recycling Initiatives at RIKEN in Japan DTSTART;VALUE=DATE-TIME:20240418T080000Z DTEND;VALUE=DATE-TIME:20240418T082000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-240@indico.nsrrc.org.tw DESCRIPTION:Speakers: Hiroki Okuno (RIKEN)\nHelium has excellent propertie s that cannot be replaced by other substances\, such as complete inertness \, cryogenic boiling point\, high thermal conductivity\, low density\, low solubility\, high diffusivity\, non-irritant properties\, and low viscosi ty. Helium is used in medical field to cool superconducting magnets in MRI \, in industry for optical fiber and semiconductor manufacturing\, welding \, leak testing\, fillers\, etc.. For academic fields\, helium is one of t he "lifelines" like water and electricity\, is an indispensable substance in a wide range of fields such as physics\, chemistry\, and astronomy. \nH owever\, "helium crisis" is globally taking place\, and this could become even more serious in the future. Japan is also suffering from this crisis because it relies on imports for 100% of its helium\, resulting in soaring prices and supply shortages. Researchers who use helium for academic rese arch have little access to it.\nWe propose and implement measures such as helium recycle system to protect academic researchers from this helium cri sis.\nAs a start\, RIKEN and a MRI company conducted a demonstration exper iment successfully to efficiently recover helium\, which is wasted and dis carded when MRIs are renewed. In this demonstration test\, the discarded M RI containing liquid helium was transported directly to RIKEN\, which has a liquefied helium production facility\, to recover the gas from the MRI. This dramatically improved the efficiency of helium transport. \n\nIn the future\, RIKEN plans to develop inexpensive on-site refining machines for semiconductor factories and to study on helium rental service for cryogeni c researchers in universities that do not have a liquefaction machine.\n\n https://indico.nsrrc.org.tw/event/16/contributions/240/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/240/ END:VEVENT BEGIN:VEVENT SUMMARY:Fast electron generation and transport studies in relativistic las er-thin foil interactions at RRCAT DTSTART;VALUE=DATE-TIME:20240417T024000Z DTEND;VALUE=DATE-TIME:20240417T030000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-259@indico.nsrrc.org.tw DESCRIPTION:Speakers: Vipul Arora (Raja Ramanna Centre for Advanced Techno logy\, Indore)\nRelativistic fast electrons are generated in the interacti on of ultrashort (tens of fs) ultrahigh intensity laser (>1018W/cm2) pulse s with solid target.Investigation of thegeneration and transport of fast e lectrons in solid material is a subject of intense research investigation not only for fundamental understanding of laser matter interaction in extr eme condition but also for various potential applications including laser driven fast ignition approach of laser fusion\, MeV proton and ion acceler ation\, creation of ultrashort x-ray sources and warm dense matter.\n At Laser Plasma Division\, RRCAT\, Indore\, India\, we have carried out t he experimental studies on the generation and transport of fast electrons in intense ultra-short laser foil interaction using high-power (150 TW\, 2 5 fs) Ti:sapphire laser in the intensity regime of ~1018 - 7x1019W/cm2. In vestigations involved both direct measurement of fast electrons as well as indirect measurement using K x-rays and hard x-rays emitted during int eraction.A clear signature of JB acceleration in oblique incidence lase r interaction with foil target was demonstrated through the observation of fast electron beam along laser direction.We also observedstrong polarizat ion dependence of JB acceleration on fast electron flux. The possible m echanism was studied by varying the preformed plasma scale length in front of the solid target. We demonstrated super ponderomotive acceleration at longer scalelength whereas the fast electron temperature was much lower th an the ponderomotive scaling. Next\, we studied the transport of fast elec trons through dense solid through K x-ray line radiation measurement us ing indigenously developed HAPG crystal spectrograph and2D high resolution monochromatic imaging usingspherically bent quartz crystal spectrograph. In particular\, refluxing of fast electrons due to excitation of electros tatic sheath field and fast electron divergence angle inside solid to infe r therole of self-generated magnetic fields on collimating fast electrons at such high laser intensity was investigated. In this talk details of the investigations performedand physical understanding of the processes invol ved will be presented.\n\nhttps://indico.nsrrc.org.tw/event/16/contributio ns/259/ LOCATION:Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/259/ END:VEVENT BEGIN:VEVENT SUMMARY:Construction of an electromagnetic calorimeter prototype using LYS O crystals for the ZDC at ePIC DTSTART;VALUE=DATE-TIME:20240418T063000Z DTEND;VALUE=DATE-TIME:20240418T065000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-241@indico.nsrrc.org.tw DESCRIPTION:Speakers: Kai-Yu Cheng (Academia Sinica)\nThe Electron-Ion col lider (EIC) is designed to collide spin-polarized beams of electrons and i ons to study with precision the dynamics of gluons and sea quarks and thei r role in the structure of visible matter. The ePIC is a general-purpose l arge-acceptance detector and will be the first experiment operated at the EIC. For studies aiming at the three-dimensional structure of nucleons and nuclei and gluon density saturation. It requires the identification of fa r-angle photons and tagging spectator neutrons. Zero Degree Calorimeter (Z DC) is proposed to achieve reasonable energy resolution for neutrons(~beam energy) and photons(0.1 to 40 GeV)\, respectively. The position resolutio n is also asked to be better than 3mrad/sqrt(E) for neutrons and 1mm for p hotons. We developed the first electromagnetic calorimeter prototype using 64 LYSO crystals\, each size 7.12mm x 7.12mm x 88mm\, and SiPMs for the ZDC. The calibration was done with Co60 and Na22 radiation sources. This F ebruary\, a beam test was performed in ELPH in Japan with 50MeV to 823MeV positron beam. The results from the calibration and test beam will be show n in this presentation.\n\nhttps://indico.nsrrc.org.tw/event/16/contributi ons/241/ LOCATION: Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/241/ END:VEVENT BEGIN:VEVENT SUMMARY:The application for accelerator based radiation therapy Overview o f the development in Taiwan DTSTART;VALUE=DATE-TIME:20240417T053000Z DTEND;VALUE=DATE-TIME:20240417T055000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-215@indico.nsrrc.org.tw DESCRIPTION:Speakers: YUNG-FA LU (Taichung Veterans General Hospital)\nAcc ording to the data and analysis of the Cancer Registry Annual Report in Ta iwan\, it can be seen from the trends in the past 10 years in 2020 that th e growth in the incidence of major cancers is approximately 3.32% in the n umber of patients per year. The first new case of aggressive cancer findin g in Taiwan is 116\,131 and there are 30\,796 patients received radiation therapy during the first course of treatment in 2018. It means around 28% of new case of aggressive cancer finding will receive radiotherapy. \nThe trends in emerging accelerator based radiation therapy in Taiwan has range d from 3D CRT in 1996 to IMRT in 2001 and even the vigorous development of particle therapy since 2015. Not only the development of particle therap y\, but the application of images guidance during treatment will become in creasingly widespread and in-depth\, creating a need for clinical applicat ion of offline and online adaptive radiotherapy. \nThere are four particle therapy center in operation including three proton center and one heavy i on center in Taiwan. We are expect having eight particle center and sevent een treatment rooms in operation by the end of 2025.\n\nhttps://indico.nsr rc.org.tw/event/16/contributions/215/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/215/ END:VEVENT BEGIN:VEVENT SUMMARY:DIRAMS C-band LINACs for preclinical FLASH electron beam irradiati on DTSTART;VALUE=DATE-TIME:20240417T061000Z DTEND;VALUE=DATE-TIME:20240417T063000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-208@indico.nsrrc.org.tw DESCRIPTION:Speakers: Heuijin Lim (Dongnam Institute of Radiological & Med ical Sciences)\nThe 6-MeV and 9-MeV electron linear accelerators (LINACs) were designed and constructed in 2015 and in 2018 at the Dongnam Institute of Radiological & Medical Sciences (DIRAMS)\, Busan\, Korea. Their C-band accelerating columns were chosen as a bi-periodic on-axis coupled structu re and operated in the π/2 standing-wave mode. They are used for preclini cal irradiators for in vitro studies of cells and small animals\, and the development & test of LINAC components. Preclinical studies have shown tha t irradiation with ultra-high dose-rate beam known as FLASH kills cancer c ells with minimal damage to normal cells. The DIRAMS LINACs provide the co nventional dose rate beam ( 40 Gy/s) by the precise control of the pulse m odulator combined with a single-board computer. For the real-time monitori ng of FLASH beams\, the delivered dose was estimated by the measured charg e by the transmission-type ionization-chamber. In this talk\, we present t he status of DIRAMS LINACs and also the preclinical results.\n\nhttps://in dico.nsrrc.org.tw/event/16/contributions/208/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/208/ END:VEVENT BEGIN:VEVENT SUMMARY:Industrial Applications at NSRRC –Taiwan’s Experiences DTSTART;VALUE=DATE-TIME:20240417T092000Z DTEND;VALUE=DATE-TIME:20240417T094000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-217@indico.nsrrc.org.tw DESCRIPTION:Speakers: Bor-Yuan Shew (NSRRC)\nAs echoing to the national de manding for industry development\, the Industry Application Division (IAD) in the National Synchrotron Radiation Research Center (NSRRC) in Taiwan w as established and launching its mission since 2008. Serving as the acting window in NSRRC\, the IAD bridges the synchrotron-radiation (SR) analytic al tools mainly to key domestic industries with practical and critical res olutions to boosting added-up values for genuine industrial concerns.\n\nA fter years of promotion\, the IAD of NSRRC has cultivated analysis capacit ies for several targeting industrial needs with fruitful results\, includi ng the high-tech semiconductors\, green energy and batteries\, advanced po lymers and carbon fibers\, steels and iron metallurgy\, pharmaceuticals\, and micro-devices as well\, which will be briefed in the presentation.\n\n https://indico.nsrrc.org.tw/event/16/contributions/217/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/217/ END:VEVENT BEGIN:VEVENT SUMMARY:Narrowband terahertz sources based on laser-plasmas for compact ac celerators DTSTART;VALUE=DATE-TIME:20240418T061000Z DTEND;VALUE=DATE-TIME:20240418T063000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-222@indico.nsrrc.org.tw DESCRIPTION:Speakers: MinSup Hur (UNIST)\nTerahertz (THz)-driven accelerat ors are emerging as promising compact particle accelerators. By using high er frequency drivers\, the threshold of vacuum breakdown can be significan tly increased. Consequently\, it is anticipated that the accelerating grad ient can be enhanced\, projecting an increase from the current 100 MV/m-or der to 1 GV/m-class. To generate the high-field THz waves\, laser-driven p lasma schemes have been studied. However\, these schemes typically produce broadband emissions\, lacking the necessary high spectral density at a sp ecific wavelength. Here we introduce novel methods aimed at concentrating THz energy into a narrow bandwidth by developing plasma oscillators. Tradi tional plasma-based narrowband THz sources focused on converting a plasma wave into an electromagnetic wave\, but encountered challenges related to conversion efficiency. Here\, we propose methods for generating plasma osc illators capable of emitting THz waves through a multipole radiation mecha nism. Our approach involves two distinct schemes: plasma dipole oscillatio n and radially oscillating plasma oscillators. Numerical simulations confi rm that both schemes effectively emit THz waves with field strengths of GV /m level and narrow spectra (\n\nhttps://indico.nsrrc.org.tw/event/16/cont ributions/222/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/222/ END:VEVENT BEGIN:VEVENT SUMMARY:Clustering of macroparticles in simulations of plasma wakefield ac celeration DTSTART;VALUE=DATE-TIME:20240418T053000Z DTEND;VALUE=DATE-TIME:20240418T055000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-219@indico.nsrrc.org.tw DESCRIPTION:Speakers: Konstantin Lotov (Budker INP)\nSimulations of plasma wakefield acceleration are challenging for many reasons\, one of which is that the wave scale (about plasma skin depth) is much larger than the Deb ye length. Attempting to resolve both would make simulations prohibitively expensive. Therefore\, grid steps far exceeding the Debye length are used \, which compromises the accuracy of PIC simulations. While this inconsist ency does not notably impact short-term processes spanning several wave pe riods\, long-term simulations lead to clustering and unphysical heating of plasma electrons.\nThe latter undesirable effects can be avoided by sligh tly modifying the law of plasma particle motion\, which is implemented in the newly developed 3d version of LCODE. The new feature enables much clea ner simulations of long-term wave evolution. In particular\, when the nume rical heating of plasma electrons is suppressed\, the wake chaotization an d premature transverse wavebreaking of a moderately nonlinear plasma wave disappear.\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/219/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/219/ END:VEVENT BEGIN:VEVENT SUMMARY:Key issues and feasibility scheme for the CSNS RCS upgrade DTSTART;VALUE=DATE-TIME:20240418T040000Z DTEND;VALUE=DATE-TIME:20240418T042000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-225@indico.nsrrc.org.tw DESCRIPTION:Speakers: Ming-Yang Huang (Institute of High Energy Physics\, Chinese Academy of Sciences)\nFor the China Spallation Neutron Source (CSN S)\, the rapid cycling synchrotron (RCS) accumulates and accelerates the i njection beam to the design energy of 1.6 GeV and then extracts the high e nergy beam to the target. As the second phase of the CSNS\, CSNS-II will achieve a beam power on the target of 500 kW. The injection energy of CSNS -II will be increased from 80 MeV to 300 MeV and the injection beam power will be increased about 20 times. In this paper\, for the CSNS-II，the up grade of the RCS will be introduced and studied in detail\, including the new injection system\, new dual harmonic cavity\, main magnet power suppli es upgrade\, new collimation system\, beam instability\, space charge effe cts\, and so on. In order to meet the requirements of beam power increase and stable operation\, the RCS beam losses from different sources are stud ied and optimized. Based on the detailed simulation results and beam exper imental results\, the feasibility upgrade schemes of the critical systems for the CSNS RCS will be given.\n\nhttps://indico.nsrrc.org.tw/event/16/co ntributions/225/ LOCATION: Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/225/ END:VEVENT BEGIN:VEVENT SUMMARY:Single-shot spatial-temporal electro-optic diagnostic of laser wak efield accelerated electron bunches DTSTART;VALUE=DATE-TIME:20240417T065000Z DTEND;VALUE=DATE-TIME:20240417T071000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-220@indico.nsrrc.org.tw DESCRIPTION:Speakers: Kai Huang (National Institutes for Quantum Science a nd Technology (QST))\nBy introducing the electron-optic Sampling technique in to the research of laser Wakefield acceleration\, we have conducted si ngle-shot spatial-temporal detection on the electron bunches.In our recent experiments\, we have measured the electron timing fluctuation at a posit ion outside the plasma. By simultaneously performing optical transition ra diation imaging and EO spatial decoding\, the absolute 3D density profile of the an electron bunch has been reconstructed. For data analysis\, detai led numerical studies were carried out. This study could have broad impact in researches of high power\, accelerators and THz optics.\n\nhttps://ind ico.nsrrc.org.tw/event/16/contributions/220/ LOCATION:Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/220/ END:VEVENT BEGIN:VEVENT SUMMARY:Opening talk DTSTART;VALUE=DATE-TIME:20240417T010000Z DTEND;VALUE=DATE-TIME:20240417T011500Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-242@indico.nsrrc.org.tw DESCRIPTION:Speakers: Chia-Hung Hsu (NSRRC)\nhttps://indico.nsrrc.org.tw/e vent/16/contributions/242/ LOCATION: Activity Center Room D260 URL:https://indico.nsrrc.org.tw/event/16/contributions/242/ END:VEVENT BEGIN:VEVENT SUMMARY:Plasma-based acceleration studies in IHEP DTSTART;VALUE=DATE-TIME:20240417T030000Z DTEND;VALUE=DATE-TIME:20240417T032000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-260@indico.nsrrc.org.tw DESCRIPTION:Speakers: Dazhang LI (IHEP\, CAS)\nDuring the last few years\, IHEP plasma-based acceleration study group dedicated its time on both las er wakefield acceleration (LWFA) and plasma wakefield acceleration (PWFA). \nIn LWFA\, we mainly focused on injection mechanism studies to improve th e beam quality. Different injection schemes such as scissors-cross ionizat ion injection\, coaxial laser interference induced injection\, tightly foc used laser injection will be introduced in this presentation.\nIn PWFA\, w e mainly studied on plasma injector for circular electron positron collide r (CEPC). Low-field dipole magnet problem in the booster ring of is one of the most important problems in CEPC that need to be addressed. One prospe ctive method is to add a few tens meter long plasma accelerator\, named “CEPC plasma injector” (CPI)\, to increase the electron/positron energ y from 10 GeV to 30 GeV\, and then inject them to the booster ring. We sta rted CPI studies since 2017 and made a great progress in the recent years. In this talk\, I’ll show the simulation studies on hosing instability f or high transformer ratio (HTR) PWFA\, high quality positron acceleration in PWFA\, electron RF guns and linac\, etc.\nAt last\, I’ll introduce 2 PWFA test facility proposals in IHEP and their recent progress.\n\nhttps:/ /indico.nsrrc.org.tw/event/16/contributions/260/ LOCATION:Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/260/ END:VEVENT BEGIN:VEVENT SUMMARY:Speeding up proton therapy: progress towards beam delivery using F ixed Field Accelerator technology” DTSTART;VALUE=DATE-TIME:20240417T084000Z DTEND;VALUE=DATE-TIME:20240417T090000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-212@indico.nsrrc.org.tw DESCRIPTION:Speakers: Suzie Sheehy (University of Melbourne)\nAccess to pr oton therapy is limited by both facility cost and existing technological l imitations. The beam delivery system (BDS) has been identified as a bottle neck\, particularly for new and emerging methodologies such as FLASH\, Arc \, and multi-ion therapies. This talk will discuss a new collaborative pro ject between Harvard/MGH\, University of Melbourne and Pyramid technologie s for a compact\, fast proton therapy system. We will focus on the 'TURBO' ‘Technology for Ultra Rapid Beam Operation’ project: a novel proof of principle BDS in development in Melbourne\, utilising novel Fixed Field A lternating Gradient optics. This system will increase the BDS energy accep tance to allow multiple beam energies to be transported\, reducing the dea d time between energy layers and enabling rapid beam delivery across the w hole tumour depth. We discuss the potential and clinical benefits of TURBO as a fixed-beamline BDS with fast energy switching for CPT.\n\nhttps://in dico.nsrrc.org.tw/event/16/contributions/212/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/212/ END:VEVENT BEGIN:VEVENT SUMMARY:The beam synchronized data acquisition system for CSNS accelerator DTSTART;VALUE=DATE-TIME:20240418T063000Z DTEND;VALUE=DATE-TIME:20240418T065000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-223@indico.nsrrc.org.tw DESCRIPTION:Speakers: Cheng Sinong (IHEP\, CAS)\nThe China Spallation Neut ron Source (CSNS) delivers a pulsed neutron beam at a 25Hz repetition rate \, necessitating precise data synchronization for effective beam state ana lysis and fault diagnosis. This work presents the development of a Beam-Sy nchronized Data Acquisition (BSDAQ) system tailored for the CSNS accelerat or. The BSDAQ system is engineered to selectively capture critical operati onal data\, thereby enhancing the understanding and optimization of accele rator performance. To address the challenges of network bandwidth and data storage constraints\, the system adopts a trigger-based data collection s trategy. It features dual modes of operation: a periodic trigger for consi stent data sampling and a random trigger for capturing data during specifi c events. The system ensures high-precision data capture\, timestamping\, and alignment with the beam pulse cycle\, followed by storage in database. An intuitive interface for data access is also integrated to support in-d epth offline analysis. The prototype BSDAQ has been successfully deployed at the CSNS\, revealing previously undetectable phenomena such as intra-pu lse beam chopping and automatic beam recovery post fast protection system activation. These insights are pivotal for advancing beam control strategi es and bolstering the reliability of the accelerator's operations.\n\nhttp s://indico.nsrrc.org.tw/event/16/contributions/223/ LOCATION:Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/223/ END:VEVENT BEGIN:VEVENT SUMMARY:COMMISSIONING STATUS OF THE RAON SUPERCONDUCTING ACCELERATOR DTSTART;VALUE=DATE-TIME:20240418T034000Z DTEND;VALUE=DATE-TIME:20240418T040000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-174@indico.nsrrc.org.tw DESCRIPTION:Speakers: Hyung Jin Kim (Institute for Basic Science)\nThe Rar e isotope Accelerator Complex for ON-line experiments (RAON) is a heavy-io n accelerator for researches using Rare Isotopes (RI) as a major research facility in Korea. It can deliver ions from hydrogen (proton) to uranium. Protons and uranium ions are accelerated up to 600 MeV and 200 MeV/u respe ctively. It can provide various rare isotope beams which are produced by i sotope separator on-line system. The RAON injector has undergone a success ful commissioning process\, demonstrating operational efficiency. The comm issioning efforts involved a comprehensive study of the beam parameters de rived from key technical systems\, including the Electron Cyclotron Resona nce (ECR) ion source and Radio-Frequency Quadrupole (RFQ). Moreover\, the commissioning process extended to the low-energy superconducting linac (SC L3)\, which has also been successfully commissioned. In this paper\, we pr esent the current beam commissioning status of the RAON injector and super conducting accelerator.\n\nhttps://indico.nsrrc.org.tw/event/16/contributi ons/174/ LOCATION: Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/174/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of long life-time RF-driven negative hydrogen ion sour ce in CSNS DTSTART;VALUE=DATE-TIME:20240418T080000Z DTEND;VALUE=DATE-TIME:20240418T082000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-226@indico.nsrrc.org.tw DESCRIPTION:Speakers: Weidong Chen ()\nTo meet the 500kW beam power requir ement of China spallation neutron source project Phase-II (CSNS-II)\, an e xternal antenna RF-driven negative hydrogen ion source has been developed. It has been put into commissioning on China spallation neutron source (C SNS) accelerator since September of 2021. In the last two run cycles\, it has operated for 315 days and 323 days respectively\, with 100% availabili ty. This report covers the recent research and development of the RF-drive n H$^-$ source and low energy beam transport (LEBT) designed for CSNS-II. A featured function of the LEBT is the electrostatic beam chopping. The i nfluence of chopping electric field to the space charge compensation is al so experimentally studied.\n\nhttps://indico.nsrrc.org.tw/event/16/contrib utions/226/ LOCATION: Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/226/ END:VEVENT BEGIN:VEVENT SUMMARY:Efficient usage of neutron beams DTSTART;VALUE=DATE-TIME:20240418T082000Z DTEND;VALUE=DATE-TIME:20240418T084000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-227@indico.nsrrc.org.tw DESCRIPTION:Speakers: Yoshihisa Iwashita ()\nSince neutrons are secondary particles\, their efficient use is important in applications. Even neutron s\, which have no electric charge\, can be deflected by magnetic fields du e to their magnetic dipole moment. Transport and manipulation of neutron b eams using magnetic fields will be discussed.\n\nhttps://indico.nsrrc.org. tw/event/16/contributions/227/ LOCATION: Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/227/ END:VEVENT BEGIN:VEVENT SUMMARY:Cryomodule test facility for ITN DTSTART;VALUE=DATE-TIME:20240418T032000Z DTEND;VALUE=DATE-TIME:20240418T034000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-166@indico.nsrrc.org.tw DESCRIPTION:Speakers: Kota NAKANISHI (KEK)\nThe ILC (The International Lin ear Collider) project has not yet started\, however basic technology devel opment must continue.\nITN (ILC Technology Network) is an international fr amework for carrying out technology development.\nITN is a project that st arted in FY2023 and will continue for five years.\nSeveral technical issue s have been proposed as development items at ITN\, and each item will be d eveloped through international cooperation.\nOne of the technology develop ment items includes manufacturing\, cooling\, and RF testing the cryomodul e.\nThe cryogenic group will need to install new equipment to cool the cry omodules.\nThe refrigerator (Linde LR280) currently operating at KEK will be dedicated to ITN.\nSince the cryomodule test stand and the helium refri gerator are approximately 100 meters apart\, installing a transfer line to transfer the liquid helium is necessary.\nAdditionally\, the installation of 2K refrigerators\, vacuum pumps\, in-line purifiers\, etc. is also con sidered.\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/166/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/166/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of Skeleton Cyclotron with HTS Magnet System for Medic al Use DTSTART;VALUE=DATE-TIME:20240418T040000Z DTEND;VALUE=DATE-TIME:20240418T042000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-184@indico.nsrrc.org.tw DESCRIPTION:Speakers: So Noguchi (Hokkaido University)\nHigh-field cyclotr on systems are strongly demanded for multi purposes: PET\, targeted $\\alp ha$-particle therapy\, etc. To install such systems into hospitals\, as li ght weight and compactness are also required\, we have been developing a n ew coreless cyclotron system with high-temperature superconducting (HTS) m agnet\, named “Skeleton Cyclotron.” The coreless cyclotron has a super ior feature of variable energy for multi purposes.\nIn the presentation\, we will show the experimental and simulation results for development of 1/ 2-scale demonstration HTS coils called “Ultra-Baby Skeleton Cyclotron (U BSC)” as the progress of this project.\n\nhttps://indico.nsrrc.org.tw/ev ent/16/contributions/184/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/184/ END:VEVENT BEGIN:VEVENT SUMMARY:The introduction of the proton FLASH experiment beam line in CGMH DTSTART;VALUE=DATE-TIME:20240417T040000Z DTEND;VALUE=DATE-TIME:20240417T042000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-211@indico.nsrrc.org.tw DESCRIPTION:Speakers: Jyun-Wei Jheng (Radiation Research Core Laboratory\, Chang Gung Memorial Hospital Linkou Branch)\, I-Chun Cho (Chang Gung Univ ersity)\nJyun-Wei Jheng1\, Shih-Yao\, Chiou1\, Tsz-Yui Chan2\, Sen-Hao Lee 3\, Tsi-Chian Chao1\,2\,3\,4\,5\, I-Chun Cho1\,5\n1 Radiation Research Cor e Laboratory\, Chang Gung Memorial Hospital Linkou Branch\, Taoyuan\, Taiw an.\n2 Department of Medical Imaging and Radiological Sciences\, Chang Gun g University\, Taoyuan\, Taiwan.\n3 Department of Radiation Oncology\, Cha ng Gung Memorial Hospital Linkou Branch\, Taoyuan\, Taiwan.\n4 Department of Radiation Oncology\, New Taipei Municipal Tucheng Hospital\, New Taipei City\, 236\, Taiwan\n5 Medical Physics Research Center\, Institute for Ra diological Research\, Chang Gung University\, Taoyuan\, Taiwan.\n\nE-mail: afsgf65445550@gmail.com\n\nObjective: The aim of this study was to develo p an irradiation system for small-field ( 40 Gy/s)\, presents unique chall enges in ensuring dose accuracy\, maintaining consistent subject positioni ng\, and achieving homogenous dose distribution within the target area.\n\ nMethods: To ensure accurate real-time dose monitoring\, a Transmission Io nization Chamber (TIC) was employed\, meticulously calibrated with a PTW P inpoint Ionization Chamber for precision. To precisely target the designat ed area on the mouse model\, the irradiation field was defined using four secondary brass collimators—two circular\, with diameters of 1 cm and 2 cm\, and two square\, with dimensions of 1 cm and 2 cm—positioned subseq uent to a lead scatter and a primary brass collimator. The beam's energy c onsistency and qualitative integrity were verified through Integrator Dept h Dose (IDD) measurements utilizing a chamber and water tank configuration \, complemented by the application of EBT3 film to evaluate the dose distr ibution at the mouse immobilization site.\n\nResults: The TIC\, crucial fo r the FLASH application\, showed significant stability and accuracy with a dose monitoring uncertainty of less than 3%. The average proton energy wa s measured at 231.7 MeV\, with the R80d depth in water—indicative of the proton dose's penetration—recorded at 315.57 mm.\n\nConclusions: The ir radiation platform developed in this study reliably produces a 1cm x 1cm s quare proton beam for FLASH irradiation experiments\, with dose monitoring effectively managed by a specially designed TIC. This advancement provide s a robust foundation for precise and controlled small-field irradiation r esearch\, with potential implications for the future of radiobiological an d oncological studies.\n\nKeyword\nProton\, FLASH\, irradiation platform\, dosimetry\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/211/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/211/ END:VEVENT BEGIN:VEVENT SUMMARY:Design and beam dynamics study of a multi-functional MEBT for CSNS DTSTART;VALUE=DATE-TIME:20240418T090000Z DTEND;VALUE=DATE-TIME:20240418T092000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-229@indico.nsrrc.org.tw DESCRIPTION:Speakers: Qiyu Kong ()\nThe CSNS is an accelerator-based multi disciplinary user facility operates at a stable beam power of 140 kW since October 2022\, which is 40% higher compared to the designed value. The up grading project of CSNS (CSNS-II) is in progress\, and the missions associ ated with linac include increasing the output energy to 300 MeV by employi ng superconducting accelerator and the peak current to 50 mA. A multi-func tional MEBT has been studied and redesigned to meet the stringent demand o f beam control under strong space charge effects. The MEBT can be characte rized by the following main functions and features: (1) beam chopping for time structure optimization\; (2) collimator for beam halo particle confin ement and removal\; (3) phase shift optimization and rigorous control of e ntire length to achieve low emittance growth transmission within the MEBT. The beam performance and error studies together with the main linac have been conducted and shown in this article. Numerous multi-particle simulati ons have shown that the multi-functional MEBT can prevent unacceptable bea m loss in the main linac.\n\nhttps://indico.nsrrc.org.tw/event/16/contribu tions/229/ LOCATION: Research Building A119 URL:https://indico.nsrrc.org.tw/event/16/contributions/229/ END:VEVENT BEGIN:VEVENT SUMMARY:Investigation on the zero liquid helium consumption cryostat for a superconducting undulator DTSTART;VALUE=DATE-TIME:20240418T061000Z DTEND;VALUE=DATE-TIME:20240418T063000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-235@indico.nsrrc.org.tw DESCRIPTION:Speakers: Zhang Xiangzhen (IHEP\, CAS)\nSuperconducting undula tors have become a research hotspot of the insertion devices in the synchr otron radiation facility. However\, the cryostat\, which is used to create a liquid helium temperature environment\, often causes the failure of the superconducting undulator. In this work\, a cryostat with a new refrigera tion distribution for a superconducting undulator is designed\, fabricated and tested. For the cooling of the superconducting magnet\, a liquid heli um circulation loop based on the thermosiphon effect is designed with no m oving component. The systematic thermal analysis and optimization are carr ied out to minimize the total heat load. The cooling capacity matches the heat load at different temperatures well and the theoretical excess coolin g capacity is increased. In the experiment\, the cryostat was tested with several superconducting magnets. There was no liquid helium consumption wi th excess cooling capacity in the test. Finally\, the superconducting magn et reached a direct current of more than 450 A. This study can be a refere nce for the development of superconducting undulator cryostats.\n\nhttps:/ /indico.nsrrc.org.tw/event/16/contributions/235/ LOCATION: Research Building L100 URL:https://indico.nsrrc.org.tw/event/16/contributions/235/ END:VEVENT BEGIN:VEVENT SUMMARY:LCODE 3D: A New Open-Source Tool for 3D PWFA simulations DTSTART;VALUE=DATE-TIME:20240417T055000Z DTEND;VALUE=DATE-TIME:20240417T061000Z DTSTAMP;VALUE=DATE-TIME:20260721T135451Z UID:indico-contribution-16-176@indico.nsrrc.org.tw DESCRIPTION:Speakers: Nikita Okhotnikov (Novosibirsk State University\, Bu dker Institute of Nuclear Physics)\nWe present LCODE 3D\, a new tool that allows for simulations of plasma wakefield acceleration in three-dimension al geometry using a quasi-static approximation. Based on the principles of the time-tested LCODE 2D code\, LCODE 3D offers the flexibility of switch ing between different geometries\, allowing for efficient work when three- dimensional effects have minimal impact. Furthermore\, LCODE 3D is an open -source tool written in Python\, providing readability and ease of use. By using JIT compilation and numpy libraries\, the computational time for si mulation is comparable to the older version written in C. LCODE 3D support s parallel calculations using CUDA or MPI\, enabling efficient simulations for large-scale problems.\n\nhttps://indico.nsrrc.org.tw/event/16/contrib utions/176/ LOCATION:Research Building A300 URL:https://indico.nsrrc.org.tw/event/16/contributions/176/ END:VEVENT END:VCALENDAR