Karamyshev, O. Bunyatov, K. Gurskiy, S. Karamysheva, G.A. Malinin, V. Popov, D.P. Shirkov, G. Shirkov, S.G. Smirnov, V.L. Vorozhtsov, S.B. JACoW Publishing Geneva, Switzerland 978-3-95450-205-9 10.18429/JACoW-Cyclotrons2019-TUB02 English 140-143 TUB02 cyclotron cavity proton extraction simulation Contribution to a conference proceedings 2020 2020-06 https://doi.org/10.18429/JACoW-Cyclotrons2019-TUB02 http://jacow.org/cyclotrons2019/papers/tub02.pdf Physical design of the compact superconducting cyclotron SC230 (91.5MHz) has been performed. The cyclotron can deliver up to 230 MeV beam for proton therapy and medico-biological research. As the cyclotron will have a relatively small magnet field, it is possible to use both superconducting and resistive coil. Besides a superconducting cyclotron we simulate design of the cyclotron with a conventional copper water-cooled coil. Such a solution allows us to achieve a lower price compared to superconducting options, but it becomes a bit heavier.