| 摘要 |
A cyclotron includes: a regenerator configured to move a beam of a charged particle on an orbit radially outward; and a magnetic channel configured to put the beam on an extraction orbit. The regenerator includes a pair of magnetic members for a regenerator. The magnetic member for a regenerator includes a first portion including a portion becoming closer to the median plane radially outward and an apex closest to the median plane. When viewed from the circumferential direction, assuming that a distance between the centerline of the apex in the radial direction and a first reference position set on a radially inner end side of the first portion is a first distance and a distance between the centerline and a second reference position set on a radially outer end side of the first portion is a second distance, the first distance is greater than the second distance. |
