To improve uniformity of radiation quantity distribution in an affected area.
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.
AKIYAMA HIROSHI
MATSUDA KOJI
FUJIMAKI HISATAKA
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