Patent attributes
A particle-beam exposure apparatus and a particle-beam therapeutic apparatus are obtained, in which, by reducing diameter increase, due to scattering in a range shifter, of a charged particle beam, the charged particle beam whose diameter is so narrow that spatially accurate exposure into the target is possible can be supplied, as well as, by placing the range shifter at a position apart from a patient, intimidation caused by a movement noise, etc. can be prevented. A particle-beam exposure apparatus and a particle-beam therapeutic apparatus include a range shifter 4 for varying energy of a charged particle beam with a thickness of the range shifter 4 being changed during exposure of the charged particle beam, so that a range of the charged particle beam at a target 5 to be exposed is set to a desired value; and a set of quadrupole magnets 6, being placed between the range shifter 4 and the target 5, based on the magnetization amount of the set of quadrupole magnets 6 being controlled corresponding to the charged-particle-beam energy varied by the range shifter 4, for reducing diameter increase, due to scattering at the range shifter 4, of the charged particle beam at the target 5.
