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TY - CONF AU - Chen, G. AU - Bi, Y.F. AU - Chao, C. AU - Chen, Y. AU - Ding, K.Z. AU - Feng, H. AU - Karamyshev, O. AU - Karamysheva, G.A. AU - Morozov, N.A. AU - Samsonov, E.V. AU - Shirkov, G. AU - Song, Y. AU - Wang, S.Y. AU - Xu, M. AU - Yang, Q. AU - Zhang, X. AU - Zheng, J. AU - Zhou, J. ED - Chrin, Jan ED - Schaa, Volker RW TI - Preliminary Design of RF System for SC200 Superconducting Cyclotron J2 - Proc. of Cyclotrons2016, Zurich, Switzerland, September 11-16, 2016 C1 - Zurich, Switzerland T2 - International Conference on Cyclotrons and Their Applications T3 - 21 LA - english AB - The SC200 is a compact superconducting cyclotron, which is designed under the collaboration of ASIPP (Hefei, China)-JINR (Dubna, Russia), for proton therapy. The protons are accelerated to 200 Mev with maximum beam current of 500 nA. The very high mean magnetic field of 2.9T-3.5T (center-extraction) challenges the design of radio frequency (RF) system because of the restricted space. The orbital frequency of the protons is ~45 MHz according to the magnetic field and beam dynamics. The RF system is supposed to operate on 2rd harmonic of ~90 MHz. Two Dee cavities located at the valley of the magnet have been adopted. The preliminary design of RF system, which consists of active tuning, coupling and so on, is presented. The computation and simulation showed good results to ensure the Dee cavities operating at the 2rd harmonic and the proper variation of acceleration voltage versus radius. PB - JACoW CP - Geneva, Switzerland SP - 208 EP - 211 KW - cavity KW - coupling KW - proton KW - cyclotron KW - simulation DA - 2017/01 PY - 2017 SN - 978-3-95450-167-0 DO - 10.18429/JACoW-Cyclotrons2016-TUP17 UR - http://jacow.org/cyclotrons2016/papers/tup17.pdf ER -