CERN Accelerating science

Article
Title	Present Status of RF System for Medical Proton Synchrotron
Author(s)	Fang, Zhigao ; Cho, Yuichi ; Egawa, Kazumi ; Endo, Kuninori ; Fusato, Tetsuo ; Hirashima, Teruhisa ; Yamanaka, Shinji
Affiliation	(DKK, Kanagawa) ; (KEK, Ibaraki)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.3185
Subject category	Accelerators and Storage Rings
Abstract	The 200MeV proton synchrotron of circumference of 9.54m is being developed for medical radiotherapy. The rf system has been carried out with a wide bandwidth of frequency sweeping from 2.0MHz to 17.8MHz. The rf cavity is designed of a compact dimension and a high acceleration gradient. The high power test of the rf system has been successfully performed and maximal acceleration gradient of 60kV/m has been achieved. The experiments with feedback control system are being studied by using a dummy beam signal. In this paper, the recent progress of the rf system and test results will be presented in detail.