BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN 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:20260907T003627Z UID:indico-contribution-446-169@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:Injection and acceleration of positron beam in plasma wakefield DTSTART;VALUE=DATE-TIME:20240417T034000Z DTEND;VALUE=DATE-TIME:20240417T040000Z DTSTAMP;VALUE=DATE-TIME:20260907T003627Z UID:indico-contribution-446-165@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: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:20260907T003627Z UID:indico-contribution-446-224@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:20260907T003627Z UID:indico-contribution-446-170@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: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:20260907T003627Z UID:indico-contribution-446-177@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:20260907T003627Z UID:indico-contribution-446-178@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:Stilling chamber assisted Stable Electron Beam Generation in LWFA DTSTART;VALUE=DATE-TIME:20240417T053000Z DTEND;VALUE=DATE-TIME:20240417T055000Z DTSTAMP;VALUE=DATE-TIME:20260907T003627Z UID:indico-contribution-446-218@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: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:20260907T003627Z UID:indico-contribution-446-162@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: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:20260907T003627Z UID:indico-contribution-446-221@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: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:20260907T003627Z UID:indico-contribution-446-180@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: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:20260907T003627Z UID:indico-contribution-446-259@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: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:20260907T003627Z UID:indico-contribution-446-222@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:20260907T003627Z UID:indico-contribution-446-219@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: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:20260907T003627Z UID:indico-contribution-446-220@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:Plasma-based acceleration studies in IHEP DTSTART;VALUE=DATE-TIME:20240417T030000Z DTEND;VALUE=DATE-TIME:20240417T032000Z DTSTAMP;VALUE=DATE-TIME:20260907T003627Z UID:indico-contribution-446-260@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:The beam synchronized data acquisition system for CSNS accelerator DTSTART;VALUE=DATE-TIME:20240418T063000Z DTEND;VALUE=DATE-TIME:20240418T065000Z DTSTAMP;VALUE=DATE-TIME:20260907T003627Z UID:indico-contribution-446-223@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: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:20260907T003627Z UID:indico-contribution-446-176@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