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Benchmarking of longitudinal calculation code BLonD for Application to J-PARC RCS

Okita, Hidefumi ; Tamura, Fumihiko  ; Yamamoto, Masanobu  ; Nomura, Masahiro ; Shimada, Taihei ; Yoshii, Masahito*; Omori, Chihiro*; Sugiyama, Yasuyuki*; Hasegawa, Katsushi*; Hara, Keigo*; Furusawa, Masashi*

Longitudinal beam simulation code BLonD (Beam Longitudinal Dynamics), which has been developed by CERN in recent years, is being used accelerator facilities around the world. BLonD can simulate longitudinal beam motion considering with wake voltage and space charge effect and is written by Python, which makes it highly readable and general-purpose code. We are currently conducting a benchmark of BLonD aiming at studying for further improvements of acceleration technology and stable operation of the J-PARC 3GeV synchrotron (RCS). The bunching factor, which express the longitudinal beam charge distribution, calculated by BLonD simulation reflected by the current 1MW beam operation parameters reproduce the experimental results well and the validity of BLonD for RCS longitudinal beam simulation was confirmed.

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