The Evaluation of the Residual Dose Caused by the Large-Angle Foil Scattering Beam Loss for the High Intensity Beam Operation in the J-PARC RCS | Zendy

Shinichi Kato | Zendy; Kazami Yamamoto | Zendy; Hiroyuki Harada | Zendy; H. Hotchi | Zendy; Pranab Saha | Zendy; Michikazu Kinsho | Zendy

Open Access

The Evaluation of the Residual Dose Caused by the Large-Angle Foil Scattering Beam Loss for the High Intensity Beam Operation in the J-PARC RCS

Author(s) -

Shinichi Kato,

Kazami Yamamoto,

Hiroyuki Harada,

H. Hotchi,

Pranab Saha,

Michikazu Kinsho

Publication year - 2015

Publication title -

proceedings of the 2nd international symposium on science at j-parc — unlocking the mysteries of life, matter and the universe —

Language(s) - English

Resource type - Conference proceedings

DOI - 10.7566/jpscp.8.012009

Subject(s) - foil method , beam (structure) , j parc , scattering , residual , intensity (physics) , optics , materials science , physics , computer science , composite material , algorithm

The Japan Proton Accelerator Research Complex 3-GeV rapid cycling synchrotron (RCS) has adopted the multi-turn charge-exchange injection scheme that uses H beams. During injection, both the injected and circulating beams scatter from the charge-exchange foil. Therefore, the beam loss caused by the large-angle scattering from the foil occurs downstream of the injection point. For countermeasure against the uncontrolled beam loss, a new collimation system was developed and installed in the summer shutdown period in 2011. During beam commissioning, this uncontrolled beam loss was successfully localized for a 300 kW beam. Since the present target power of the RCS is 1 MW, the accurate simulation model to reproduce experimental results has been constructed in order to evaluate residual dose at higher power operation.

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