D’Agostino, G. Kleeven, W.J.G.M. JACoW Publishing Geneva, Switzerland 2673-5482 978-3-95450-212-7 10.18429/JACoW-CYCLOTRONS2022-WEAI01 English 138-142 cyclotron extraction space-charge ion-source simulation Contribution to a conference proceedings 2023 2023-10 https://doi.org/10.18429/JACoW-CYCLOTRONS2022-WEAI01 https://jacow.org/cyclotrons2022/papers/weai01.pdf Central region design simulations for cyclotrons with internal ion source are often complicated by the fact that the initial particle phase space distribution is not well known. Especially for high-intensity cyclotrons, one would like to have a quantitative self-consistent approach for a more accurate simulation of the beam extracted from the ion source and its acceleration in the first accelerating gaps under space charge conditions. This paper proposes some new ideas and methods for this problem. The simulation approach has been developed at IBA for the high-intensity compact self-extracting cyclotron in the EU-H2020-MSCA InnovaTron project. Detailed results of simulations on plasma meniscus and space charge dominated beam extracted from it and accelerated in the cyclotron centre are shown in the paper.