2002•Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)Requires access
A combined function magnet for a compact synchrotron
Masahiro Tadokoro, J.I. Hirota, Kazuo Hiramoto, Masumi Umezawa, Shunji Kakiuchi, Yoshihisa Iwashita, Akira Noda, T. Shirai, Makoto Inoue
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Abstract
At Kyoto University, a compact proton synchrotron with combined function lattice has been proposed for cancer therapy facility, KUMPF (Kyoto University Medical Proton Facility). KUMPF provides proton beams in the energy range of 70-250 MeV with average current of about 10 nA. The synchrotron consists of six identical combined function magnets, each of which deflects the proton beam 60 degrees. The magnet has an FDF structure where focusing (F) and defocusing (D) sectors deflect the beam 15 and 30 degrees, respectively. In order to realize the tune value of (1.75, 1.75), n-values of -5.856 and 6.164 are required for F and D sectors, respectively. In the present paper, the detailed design of the combined function magnet will be presented.