Karamysheva, G.A. Bunyatov, K. Gerasimov, V.A. Gurskiy, S. Hodshibagijan, G.G. Karamyshev, O. Lyapin, I.D. Malinin, V. Nikiforov, D. Novikov, M.S. Popov, D. Romanov, V.M. Shirkov, G. Shirkov, S.G. Sinitsa, A.A. Trubnikov, G.V. Yakovenko, S. JACoW Publishing Geneva, Switzerland 2673-5482 978-3-95450-212-7 10.18429/JACoW-CYCLOTRONS2022-THPO012 English 327-329 cyclotron proton extraction cavity radiation Contribution to a conference proceedings 2023 2023-10 https://doi.org/10.18429/JACoW-CYCLOTRONS2022-THPO012 https://jacow.org/cyclotrons2022/papers/thpo012.pdf The current status of the MSC230 superconducting cyclotron designed for biomedical research is presented. MSC230 is an isochronous four-sector compact cyclotron with a magnetic field in the center of 1.7 T. Acceleration is performed at the fourth harmonic mode of the accelerating radio-frequency (RF) system consisting of four cavities located in the cyclotron valleys. The accelerator will use an internal Penning type source with a hot cathode. Particular attention is paid to extraction, as it must have a high extraction efficiency.