Being the operational mannered null charged particle beam accelerator of the corpuscular ray lighting medical system and the corpuscular ray lighting medical system which use the charged particle beam

摘要

PROBLEM TO BE SOLVED: To provide a charged-particle beam accelerator having an electromagnet power source without needing simplification and the high reliability of beam emission control, reduction in the number of constituent apparatuses and high stability, and to provide a particle beam radiation therapy system using it.;SOLUTION: A means for increasing the amplitude of betatron oscillation within a stable limit of resonance is operated in a frequency band in a range in which the circulating beam does not go beyond a boundary of the stable limit of resonance, and a means for varying the boundary of the stable limit of resonance is operated at appropriate timing as required for beam emission so that the charged-particle beam is emitted.;COPYRIGHT: (C)2006,JPO&NCIPI