1-MW beam operation scenario in the J-PARC RCS

Hotchi, Hideaki  ; Harada, Hiroyuki  ; Hayashi, Naoki  ; Kinsho, Michikazu  ; Saha, P. K.   ; Shobuda, Yoshihiro   ; Tamura, Fumihiko   ; Yamamoto, Kazami   ; Yamamoto, Masanobu   

The J-PARC RCS was made available for user operation in December 2008 with an output beam power of 4 kW. Since then, the output beam power of the RCS has been steadily increasing following progressions in beam tuning and hardware improvements. So far, the RCS has successfully achieved high-intensity beam trials of up to 420 kW at a low-level intensity loss of less than 1%, and the output beam power for the routine user program has been increased to 280 kW. While the current injection energy is 181 MeV, it will be upgraded to 400 MeV in 2013. After that, we are to aim at our final goal of 1 MW output beam power. In this paper, we discuss 1 MW beam operation scenario of the RCS on the basis of the numerical simulations and the experimental results obtained so far.