Bian, T.J. An, S. Guan, F.P. Ji, L.Y. Wei, S.M. JACoW Publishing Geneva, Switzerland 2673-5482 978-3-95450-212-7 10.18429/JACoW-CYCLOTRONS2022-FRAO02 English 359-363 cyclotron resonance extraction neutron cavity Contribution to a conference proceedings 2023 2023-10 https://doi.org/10.18429/JACoW-CYCLOTRONS2022-FRAO02 https://jacow.org/cyclotrons2022/papers/frao02.pdf 10MW-class ultra-high power cyclotron (UHPC) has great application prospects in cutting-edge sciences, neutron source, advanced energy and advanced material, etc. So far, Cyclotron with average beam power of 10 MW still have some bottleneck problems. Beam energy and current of a high-power cyclotron is typically less than 800MeV and 3mA. In this paper, bottleneck problems of UHPC are analysed, and then a preliminary design of UHPC-10MW is presented.