TUP23 　ポスター①　 8月29日 14号館1432教室 13:30-15:30

出力可変スケルトンサイクロトロンの磁場設計

Magnetic field design of variable-beam-type skeleton cyclotron

○荘 浚謙，福田 光宏，依田 哲彦，神田 浩樹，斎藤 高嶺，安田 裕介，原 隆文，Zhao Hang，橘高 正樹，松井 昇大朗，渡辺 薫，井村 友紀（阪大RCNP），石山 敦士（早大），野口 聡（北大），植田 浩士（岡山大），吉田 潤（住友重機），長屋 重夫，渡部 智則（中部電力）

○Tsun--him Chong, Mitsuhiro Fukuda, Tetsuhiko Yorita, Hiroki Kanda, Takane Saitou, Yusuke Yasuda, Takafumi Hara, Hang Zhao, Masaki Kittaka, Shotaro Matsui, Kaoru Watanabe, Tomoki Imura (RCNP), Atsushi Ishiyama (Waseda Univ.), So Noguchi (Hokkaido Univ.), Hiroshi Ueda (Okayama Univ.), Jun Yoshida (SHI Ltd), Shigeo Nagaya, Tomonori Watanabe (Chubu Electric Power Co.,Inc)

In recent years, due to the rapid development of beam application technologies, the demands for ion beam has been growing. However, conventional cyclotron uses electromagnet with iron-core for magnetic field induction, where the field linear adjustability is limited by the iron-core’s hysteresis. As a result, it requires a long time and skilled operators to adjust the field and produce different types of beam from one cyclotron. As to medical cyclotron, the beam type it can produce is usually limited to one. In order to accomplish variable beam type production from one cyclotron, an air-core cyclotron is under development in Research Center for Nuclear Physics, Osaka University. Without any iron-core, this skeleton cyclotron induces magnetic field with only superconducting electromagnet, where the field can be adjusted easily without nonlinearity. This cyclotron, with extraction radius of 50 cm, is designed to produce H+, D+ and He2+ beam up to 70 MeV, 40 MeV and 80 MeV respectively. The maximum average magnetic field varies from 1.715 T to 2.534 T. In this work, the magnetic field design for the skeleton cyclotron will be presented, and the beam quality will be discussed.