1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

Simulation studies on bent silicon crystals for loss reduction in slow extraction operation at J-PARC Main Ring

TUPB023
3 Jun 2025, 16:00
2h
Exhibiton Hall A _Bear (TWTC)

Exhibiton Hall A _Bear

TWTC

Poster Presentation MC4.T12 Beam Injection/Extraction and Transport Tuesday Poster Session

Speaker

Ryotaro Muto (High Energy Accelerator Research Organization)

Description

Reducing beam loss during slow extraction remains a critical challenge for the J-PARC Main Ring, which aims to enhance beam power for its 30 GeV proton beam. Since beam loss during slow extraction mainly occurs at the electrostatic septum, it is important to reduce beam loss at this location. Researchers at CERN SPS have recently reported that beam loss can be reduced by installing bent silicon crystals in the accelerator ring and utilizing their charged particle deflection effect. In this paper, we report the results of a simulation study on the expected beam loss reduction effect when the bent silicon crystal is installed upstream of the electrostatic septum of the J-PARC Main Ring and the beam deflection effects of the bent silicon crystal, called channeling or volume reflection, are utilized. The required size and installation position of the silicon crystal, and the required accuracy for adjusting the position and angle will also be reported.

Region represented Asia
Paper preparation format LaTeX

Author

Ryotaro Muto (High Energy Accelerator Research Organization)

Co-authors

Akihiko Matsumura (Nihon Advanced Technology Co., Ltd) Eiichi Yanaoka (High Energy Accelerator Research Organization) Katsuya Okamura (High Energy Accelerator Research Organization) Kazunori Numai (High Energy Accelerator Research Organization) Masahito Tomizawa (High Energy Accelerator Research Organization) Shigeru Murasugi (High Energy Accelerator Research Organization) Takashi Asami (Japan Proton Accelerator Research Complex) Takuro Kimura (Japan Proton Accelerator Research Complex) Yoshihisa Shirakabe (High Energy Accelerator Research Organization)

Presentation materials

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