Karamysheva, G.A. Bi, Y.F. Chen, G. Chen, Y. Ding, K.Z. Feng, H. Gurskiy, S. Karamyshev, O. Li, J. Morozov, N.A. Popov, D.V. Samsonov, E.V. Shirkov, G. Shirkov, S.G. Song, Y. Trubnikov, G.V. Xie, Y.H. Yang, Q. Zheng, J. JACoW Geneva, Switzerland 978-3-95450-167-0 10.18429/JACoW-Cyclotrons2016-THC03 English 371-373 THC03 cyclotron extraction proton simulation acceleration Contribution to a conference proceedings 2017 2017-01 http://dx.doi.org/10.18429/JACoW-Cyclotrons2016-THC03 http://jacow.org/cyclotrons2016/papers/thc03.pdf Superconducting cyclotron SC200 will provide acceleration of protons up to 200 MeV with maximum beam current of 1 μA. We plan to manufacture in China two cyclotrons: one will operate in Hefei cyclotron medical center the other will replace Phasotron in Medico-technical Center JINR Dubna and will be used for cancer therapy by protons. Now we present results of simulation of magnetic, acceleratiion and extraction systems.