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.