ADJUSTING METHOD OF PARTICLE BEAM IRRADIATION APPARATUS AND IRRADIATION FIELD FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To improve uniformity of radiation quantity distribution in an affected area.;SOLUTION: A particle beam curing apparatus 1 comprises a charged particle beam generating device 2 and an irradiation field forming device 15. An ion beam from the charged particle beam generating apparatus 2 is irradiated on the affected area 62 through the irradiation field forming apparatus 15. On a downstream side of a first and a second scanning electromagnets 17, 18, a scattering body device 19 integrated with a flying distance adjusting device 20, and a Bragg peak enlarging device 21 solely, each mounted on the irradiation field forming device 15, are moved on a beam axis 14. Movement of the scattering body device 19 adjusts scattering degree of the ion beam. Movement of the flying distance adjusting device 20 adjusts a change of the scattering degree according to absorber's thickness adjustment. Movement of the Bragg peak enlarging device 21 adjusts a change of the scattering degree aroused according to an SOBP apparatus 21. Because of these adjustment, radiation quantity distribution in the affected area is uniformalized.;COPYRIGHT: (C)2005,JPO&NCIPI