초록 ▼

The present invention provides apparatus for acceleration of a charged particle beam which includes energy means for altering the energy of a circulating beam circulating in the apparatus and means for extracting output beams from the apparatus. Control means are arranged to be operable to alter the

The present invention provides apparatus for acceleration of a charged particle beam which includes energy means for altering the energy of a circulating beam circulating in the apparatus and means for extracting output beams from the apparatus. Control means are arranged to be operable to alter the energy of the circulating beam using the energy means so as to be able to extract output beams of at least two energies from the apparatus using the means for extracting. Thus there is provided an accelerator, and an extraction method therefor, which is capable of extracting a small diameter beam having a varying energy level. This facilitates improved medical irradiation treatment using the beam.

대표청구항 ▼

[ What is claimed is:] [1.] Apparatus for acceleration of a charged particle beam, the apparatus having:a circulation chamber, for circulation of a charged particle beam,bending magnets for generating bending magnetic fields for bending a circulating beam circulating in said circulation chamber,a mu

[ What is claimed is:] [1.] Apparatus for acceleration of a charged particle beam, the apparatus having:a circulation chamber, for circulation of a charged particle beam,bending magnets for generating bending magnetic fields for bending a circulating beam circulating in said circulation chamber,a multipole magnet for generating a multipole magnetic field for specifying a stability limit of resonance of said circulating beam,energy means for altering the energy of said circulating beam,extraction means for extracting output beams from the apparatus, andcontrol means arranged for altering the energy of said circulating beam using said energy means in the extraction of said output beams so as to alter the energy of the output beam and for maintaining substantially constant a stability limit of a resonance of the betatron oscillation of said circulating beam by using bending and multipole magnets while the output beams are being extracted.