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Report No.
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Consideration of high intensity single bunch acceleration in J-PARC RCS

Tamura, Fumihiko   ; Okita, Hidefumi  ; Hotchi, Hideaki*; Saha, P. K.   ; Meigo, Shinichiro   ; Yoshii, Masahito*; Omori, Chihiro*; Yamamoto, Masanobu   ; Seiya, Kiyomi*; Sugiyama, Yasuyuki*; Nomura, Masahiro  ; Shimada, Taihei ; Hasegawa, Katsushi*; Hara, Keigo*; Miyakoshi, Ryosuke*

The J-PARC 3GeV synchrotron (RCS) provides high intensity proton beams to the Materials and Life Science Experimental Facility (MLF) and the Main Ring (MR). The harmonic number (h) of the RCS is 2 and the RCS normally accelerates two bunches. For some experiments at the MLF, a single bunch is preferred. In this case, one of the rf bucket is filled with protons and the other is empty. Therefore the beam intensity is halved. If the RCS can accelerate with h=1, the intensity per bunch can be doubled, enabling to provide single bunch beams to the MLF with the maximum intensity. This possibly increases the MR beam power by injecting high intensity single bunches eight times. In this presentation, we report mainly on the consideration of h=1 acceleration in the RCS by longitudinal simulations.

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