METHOD AND APPARATUS FOR CONTROLLING CIRCULAR PARTICLE ACCELERATOR, AND CIRCULAR PARTICLE ACCELERATOR SYSTEM

摘要

The amplitude of a betatron oscillation of a circulating charged-particle beam is varied by a high-frequency device, while the tune of the charged-particle beam is varied with the betatron oscillation amplitude by an eight-pole electromagnet. The distribution of particle density of the charged-particle beam is made uniform by repeatedly varying the betatron oscillation amplitude and tune. Since the change in betatron oscillation amplitude by the application of a high-frequency electromagnetic field and the change in tune by the application of eight-pole magnetic fields occur independently of the beam energy and current value, the distribution of particle density of the charged-particle beam can be controlled independently of the beam energy and current value.