Malinin, V. Karamyshev, O. Karamysheva, T.V. Lyapin, I.D. Popov, D. Sinitsa, A.A. JACoW Publishing Geneva, Switzerland 2673-5482 978-3-95450-212-7 10.18429/JACoW-CYCLOTRONS2022-THBO06 English 285-287 cyclotron focusing proton radiation acceleration Contribution to a conference proceedings 2023 2023-10 https://doi.org/10.18429/JACoW-CYCLOTRONS2022-THBO06 https://jacow.org/cyclotrons2022/papers/thbo06.pdf MSC230 is an innovative efficient medical super-conducting cyclotron for the study and investigation of the conventional proton and FLASH therapy, devel-oped by JINR for its new biomedical research center. The machine has an internal injection system provided by a PIG ion source and, for better efficiency, 4 RF dees connected in the center. Despite these re-strictions, it is possible to create a center region design which allows initial acceleration with minimal losses sufficient for the FLASH therapy. The design and its features presented in this talk.