CHARGED PARTICLE BEAM ACCELERATOR, AND PARTICLE BEAM IRRADIATION SYSTEM USING THE SAME

摘要

PPROBLEM TO BE SOLVED: To provide a charged particle beam accelerator capable of solving a problem where a stable region boundary of betatron vibration is changed and a charged particle beam is emitted depending on ripple of main electromagnet power; and to provide a particle beam irradiation system using the charged particle beam accelerator. PSOLUTION: Beam emission from an orbit is operated at emission timing of a means changing a stable region boundary, and a high-frequency signal generation part of an RFKO apparatus (high frequency generator) 8 is swept from a frequency f1 bringing a charged particle beam in the vicinity of the center of a revolving beam into a resonant state to a frequency f2 bringing the charged particle beam nearly at the maximum amplitude in the stable region boundary into a resonant state, and controlled by an amplitude modulation waveform of f1f2. PCOPYRIGHT: (C)2008,JPO&INPIT