AFAD2025 (Asian Forum for Accelerators and Detectors）

Session

Parallel D

19 Jun 2025, 10:50

Science Campus Hall (Tohoku Univ. Aobayama-campus)

Conveners

Parallel D: WG5

• Takashi Ino (KEK)

Parallel D: WG5

• Weidong Chen

Parallel D: WG7

• Takeshi Dohmae (KEK)

74. New LEBT with stripped protons removal for superconducting linacs

Weidong Chen (IHEP, CAS)

19/06/2025, 10:50

WG5

A new low-energy beam transport (LEBT) system with a two-solenoid structure has been designed for the CSNS-II accelerator, which will incorporate a superconducting linac. In addition to its conventional functions, such as differential pumping and RFQ phase matching, this LEBT introduces several advanced features. First, the beamline is tilted by 1.8 degrees upstream of the second solenoid,...

72. Design of High-energy Proton Beamlines and Experimental Station in CSNS-II

Zhiping Li (CSNS)

19/06/2025, 11:10

WG5

The high-energy proton beam experimental station (HPES) planned to be constructed in CSNS-II can provide multi-pulse high-energy proton test beam with an extremely low beam intensity, which has important applications in research fields such as advanced detectors, irradiation effects, and proton imaging. This report introduces the design of the proton beamlines and experimental station of HPES.

70. Non-invasive beam profile monitors for the CSNS Accelerator

Renjun Yang (IHEP)

19/06/2025, 11:30

WG5

The China Spallation Neutron Source (CSNS) is a major facility for neutron science in China, and is currently operating at an averaged beam power of 170 kW with a beam energy of 1.6 GeV and repetition rate of 25 Hz. In 2024, the CSNS Upgrade project (CSNS-II) was launched aiming to improve the average beam power to 500 kW. In the sequence, a number of new instrumentations will be equipped at...

68. Design scheme for the CSNS-II FFAG accelerator

Mingyang Huang (IHEP, CAS)

19/06/2025, 11:50

WG5

In order to facilitate specialized applications involving broad-band white light neutron and muon sources, the China Spallation Neutron Source (CSNS) plans to construct a Fixed-Field Alternating Gradient (FFAG) accelerator. With the 300 MeV injector of the CSNS-II, the FFAG accelerator will increase the beam energy from 300 MeV to 600 MeV and then to bombard a target, thereby generating the...

80. Current Status and Upgrade plan of 100 MeV Proton Linac at KOMAC

Seunghyun Lee (KOMAC, KAERI)

19/06/2025, 13:30

WG5

The 100 MeV Proton Linear Accelerator (Linac) has been in operation at the Korea Multipurpose Accelerator Complex (KOMAC) since 2013. Four beam lines are regularly used to provide proton beam services to users. In addition, the neutron beam line is ready to start user services after pilot operation. In parallel, the energy upgrade of the proton linear accelerator is also planned. The proposed...

19. Overview of the Laser Plasma RF Ion Source (LaPRIS): Principle, Development, and Experimental Progress

Shotaro Matsui (Research Center for Nuclear Physics, Osaka University)

19/06/2025, 13:50

WG5

LaPRIS (Laser Plasma RF Ion Source) is a novel ion source that generates plasma by irradiating pulsed gas with an ultrashort laser pulse. The resulting ions are extracted using a radio-frequency (RF) electric field. Due to the spatiotemporal localization of the laser, ion production occurs only within a brief moment, which may enable high bunching efficiency and low emittance. In this...

86. Compact neutron sources in Japan

Takashi INO (KEK)

19/06/2025, 14:10

WG5

Compact neutron sources are small scale neutron sources driven by accelerators. They are also called as CANS or compact accelerator-based neutron sources. Unlike large scale neutron sources such as spallation neutron sources and nuclear reactor neutron sources, CANS are low-cost, small-sized, and highly flexible. The drawback of CANS is the neutron flux, which can be several orders lower than...

13. Development of superconducting insertion devices in SSRF

Zhanguo ZONG (SARI)

19/06/2025, 15:30

WG7

The Shanghai Synchrotron Radiation Facility (SSRF) Science Center is located in the Zhangjiang High-Tech Park in Pudong, Shanghai, and is affiliated with the Shanghai Advanced Research Institute, Chinese Academy of Sciences. The center conducts the construction and operation of the scientific facilities, including the SSRF and the Shanghai Soft X-ray Free Electron Laser Facility (SXFEL), as...

14. Numerical simulation and vertical test of conductive cooling superconducting cavity

Xiao Liu (IHEP)

19/06/2025, 15:50

WG7

In order to stably and reliably remove the electromagnetic losses of the superconducting cavity through thermal conduction using cryocoolers, numerical simulations and experimental studies were conducted on the cooling structure and RF performance of the conduction-cooled superconducting cavity. Based on the geometric structure and electromagnetic losses of the 1.3 GHz superconducting cavity,...

15. Development of Cryogen-free Conduction-Cooled 5-Tesla Wavelengh Shifter Utilizing High-Temperature Superconducting Technology

Garam Hahn (POSTECH)

19/06/2025, 16:10

WG7

This work presents the development status of a high-temperature superconducting (HTS) wavelength shifter magnet, a collaborative effort by Pohang Accelerator Laboratory (PAL) and Seoul National University (SNU). The device employs a pure HTS coil system with a conduction-cooled, cryogen-free cryostat, designed to achieve stable operation at 5 T. Following the completion of the vacuum chamber...

16. Conduction cooling research in KEK towards liquid helium free SRF accelerator

Tomohiro Yamada (KEK)

19/06/2025, 16:30

WG7

We are aiming for liquid helium free SRF accelerator by conduction-cooling the Nb3Sn cavity with a cryocooler. The current status of conduction cooling research and findings to date will be presented.