D’, Agostino Calabretta, L. D'Agostino, G. Kleeven, W.J.G.M. Rifuggiato, D. JACoW Publishing Geneva, Switzerland 978-3-95450-205-9 10.18429/JACoW-Cyclotrons2019-TUP011 English 177-180 TUP011 cyclotron extraction injection simulation acceleration Contribution to a conference proceedings 2020 2020-06 https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP011 http://jacow.org/cyclotrons2019/papers/tup011.pdf The Superconducting Cyclotron (CS) at INFN-LNS is regularly operated with beam power up to 100 W. The present efforts in upgrading the cyclotron are directed towards an increase of beam power up to 10 kW for ions with mass number A < 40 and energies between 15 and 70 AMeV by means of increase of beam intensity. Moreover, a beam energy resolution of 0.1% is requested by the NUMEN project at INFN-LNS. We plan to achieve high beam power by increasing the efficiency of the injection and extraction processes. The current extraction efficiency is lower than 60%. We expect to increase it to a value close to 100% by extracting the specific ion beams by stripping and no longer by electrostatic deflectors. A spiral inflector is used to bent onto the median plane the ion beams produced by the two ECR ion sources. Including the effect of a drift buncher placed in the axial injection line, the current injection efficiency is about 15%. The study of an upgraded CS central region is ongoing at INFN-LNS. First results of simulation study aimed to increase the injection efficiency are presented.