| abstract |
[PROBLEMS] Conventionally, when beam acceleration is performed by a synchrotron or the like, the generation of a high-frequency electric field is controlled using three function generators and a high-frequency accelerator, so that the control system is complicated, expensive, and reliable. There are challenges. It also aims to solve problems such as requiring a long-time optimization of control and a highly stable electromagnet power source for the requirements of beam emission and beam intensity at various energies. To provide a charged particle beam accelerator equipped with an electromagnet power source that does not require high stability, simplification of beam extraction control, high reliability, a reduction in the number of components, and a particle beam irradiation medical system using the charged particle beam accelerator. SOLUTION: The means for increasing the betatron oscillation amplitude within the resonance stability limit is operated in a frequency band in which the orbiting beam does not exceed the resonance stability limit, and the resonance stability limit is set at a timing required for beam emission. The changing means is operated to emit a charged particle beam. [Selection] Figure 1 |