Description
Chair: Huang-Hsiu Tsai, NSRRC
The ILC (The International Linear Collider) project has not yet started, however basic technology development must continue.
ITN (ILC Technology Network) is an international framework for carrying out technology development.
ITN is a project that started in FY2023 and will continue for five years.
Several technical issues have been proposed as development items at ITN, and each item will be...
A 230 MeV superconducting cyclotron SC230 is currently the most compact isochronous cyclotron for proton therapy, with a yoke diameter, height and weight of 2.8 m, 1.7 m and 65 t, respectively. It has cryogen-free superconducting coils to generate a high magnetic field. It also features a high beam current of up to 1 μA and low power consumption of its system below 200 kW. The development...
High-field cyclotron systems are strongly demanded for multi purposes: PET, targeted $\alpha$-particle therapy, etc. To install such systems into hospitals, as light weight and compactness are also required, we have been developing a new coreless cyclotron system with high-temperature superconducting (HTS) magnet, named “Skeleton Cyclotron.” The coreless cyclotron has a superior feature of...
The NSRRC operates two synchrotron radiation light sources, Taiwan Light Source and Taiwan Photon Source. Both sources employ superconducting radio frequency (SRF) cavities. Recently, occurrences of multipacting events have been encountered during the operation of the SRF modules in both sources, leading to operational challenges. In this report, we provide an overview of the SRF modules in...
High Energy Photon Source (HEPS) is a high-performance and high-energy synchrotron radiation light source with a beam energy of 6GeV and an ultra-low emittance of better than 0.06nm×rad. The HEPS is mainly composed of accelerator, beamlines and end-stations.The cryogenic system includes a helium refrigerator system and a nitrogen cryogenic plant. The helium refrigerator system has been...
Superconducting undulators have become a research hotspot of the insertion devices in the synchrotron 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 refrigeration distribution for a superconducting undulator is designed, fabricated and...
The 650 MHz single-cell superconducting radio-frequency (SRF) cavities used for the Circular Electron Positron Collider (CEPC) were studied to achieve a high accelerating gradient (Eacc) and high intrinsic quality factor (Q0). The 650 MHz single-cell cavities were subjected to a combination of buffered chemical polishing (BCP) and electropolishing (EP), and their Eacc exceeded 40 MV/m. Such a...
High energy proton colliders towards 100 TeV are proposed these years to study the physics beyond the Standard Model. The colliders call for 16-20 Tesla (T) accelerator magnets to bend and focus the particle beams. IHEP-CAS has been engaged in developing high field magnet technology with Nb3Sn and HTS materials from 2014: several model dipoles have been developed with combined common coil...
In 2015, Taiwan Photon Source (TPS) successfully completed a significant project involving the installation of a crucial 600-meter-long liquid nitrogen (LN2) transfer line specifically 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...
Helium has excellent properties 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 viscosity. Helium is used in medical field to cool superconducting magnets in MRI, in industry for optical fiber and semiconductor manufacturing, welding, leak...
Several aspects of the operation of ANU linac cryogenic system is discussed. We will describe the upgrade options of the 30 years old cryogenic facility.
A two-cell 1.5-GHz superconducting radio-frequency (SRF) cavity was designed and optimized by NSRRC previously, and then manufactured by Mitsubishi Heavy Industry Machinery Systems (MHI MS), Japan. Following post processes on this SRF cavity such as electrical polishing (EP), annealing, and pre-tuning, had been finished in KEK, Japan in 2023 under a cooperation agreement between NSRRC and...
In the operation of the cryogenic helium distribution system for TPS superconducting radio frequency (SRF) cavities, thermal acoustic oscillations (TAOs) frequently arise, causing pressure fluctuations in the cold helium gas processing lines, reaching up to 65 mbar. These TAOs introduce an additional heat load, impacting the operational stability of the SRF cavities. To address this issue,...
