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Report No.

Beam power and residual dose history of J-PARC RCS

Yamamoto, Kazami  ; Hotchi, Hideaki ; Harada, Hiroyuki ; Hayashi, Naoki ; Kinsho, Michikazu ; Saha, P. K.  ; Tamura, Fumihiko  ; Yamamoto, Masanobu  ; Yoshimoto, Masahiro ; Nakane, Yoshihiro ; Seki, Kazunari; Miyamoto, Yukihiro 

A 3 GeV rapid cycling synchrotron (RCS) at J-PARC was commissioned in October 2007. Afterwards, the beam intensity was increased through a beam study, and the RCS has continuously provided a proton beam $$>$$ 100 kW to the neutron target since October 2009. With renewed efforts brought about by beam commissioning, we have reduced losses in the RCS and achieved low-loss operation. We present the history of the operational beam power and the residual dose distributions after operation.



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