Simulation studies on bent silicon crystals for loss reduction in slow extraction operation at J-PARC Main Ring
Year: 2025
Type: conference-paper
Abstract: 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.
Authors: Muto,Ryotaro, Matsumura,Akihiko, Yanaoka,Eiichi, Okamura,Katsuya, Numai,Kazunori, Tomizawa,Masahito, Murasugi,Shigeru, Asami,Takashi, Kimura,Takuro, Shirakabe,Yoshihisa
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7104267550
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