Patent ID: 7919759
Filing Date: 2011-04-05
Classification: A61N,G21K,H05H

Abstract:
1. A charged particle beam irradiator irradiating a target with a charged particle beam accelerated by an accelerator, comprising: a bending electromagnet for bending the charged particle beam toward the target; and an irradiation field forming electromagnet for irradiating the target by scanning the charged particle beam which travels through the bending electromagnet, wherein, the bending electromagnet first scans the charged particle beam in an X-direction which is parallel to a plane including a bending trajectory of the beam and being perpendicular to a direction of the charged particle beam traveling by increasing or decreasing the bending electromagnetic field; and the irradiation field forming electromagnet subsequently scans the charged particle beam in a Y-direction which is perpendicular to the direction of the beam traveling and the X-direction of the charged particle beam, whereby irradiating the target with the charged particle beam is performed.