Circular accelerator and particle beam therapy apparatus

摘要

One embodiment of a particle circular accelerator 1 includes: a beam deflector for beam injections, bending electromagnets that causes the beam injected from the beam deflector for beam injections to circulate so as to form a circulation orbit, orbit adjusting electromagnets for injected beams that shift the position of each injected beam relative to the center of the circulation orbit of the beam, quadrupole electromagnets and sextupole electromagnets that adjust their respective quantities of magnetic excitation at the time of a beam extraction so as to extract a beam in a resonant region off a stable reason of beams and a beam deflector for beam extractions that takes out the beam extracted from the resonant region to the outside. The circular accelerator 1 injects beams from the inner side thereof and emits beams to the outer side thereof.

主权项

1. A circular accelerator comprising:
a beam deflector for receiving beam injections and deflecting the beam; beam bending electromagnets for forming a circulation orbit by causing the beam injected from the beam deflector for beam injections to circulate; orbit adjusting electromagnets for adjusting orbit of an injected beam adapted to shift the position of each injected beam relative to center of the circulation orbit of the beam; beam extraction electromagnets adapted to adjust their respective quantities of magnetic excitation at time of extraction of a charged particle beam and operate to draw out a charged particle beam in a resonant region located off a stable region of charged particle beams; and a beam deflector for beam extractions adapted to draw out the beam extracted from the resonant region to outside; the circular accelerator being adapted to inject the beam from inner side and extract the beam to outer side of the circular accelerator.