Patent ID: 6087670
Filing Date: 2000-07-11
Classification: A61N,H05H

Abstract:
A synchrotron type accelerator including: a deflecting electromagnet arranged on a circulating orbit of a charged particle beam; four-pole divergence electromagnets and four-pole convergence electromagnets arranged on said circulating orbit; a high frequency applying unit arranged on said circulating orbit for applying a high frequency electromagnetic field to said charged particle beam which circulates and for increasing an amplitude of betatron oscillation of said charged particle beam to a level above a stability limit of resonance; a first deflector for beam ejection arranged on said circulating orbit for deflecting said charged particle beam excited above said stability limit of the resonance by said high frequency applying unit and a second deflector for beam ejection arranged on said circulating orbit used in pairs with said first deflector for beam ejection for introducing said charged particle beam deflected by said first deflector for beam ejection into an ejected beam transporting system;wherein said deflecting electromagnet and said second deflector for beam ejection are arranged in this order downstream with respect to said first deflector for beam ejection, and said four-pole divergence electromagnets are arranged downstream with respect to said first deflector for beam ejection and upstream with respect to said deflecting electromagnet and downstream with respect to said deflecting electromagnet and upstream with respect to said second deflector for beam ejection.