Powerful neutron generators based on high current ECR ion sources with gyrotron plasma heatingV.A. Skalyga, S.V. Golubev, I.V. Izotov, R.L. Lapin, S.V. Razin, R.A. Shaposhnikov, S.V. Sidorov and O. TarvainenEPJ Web Conf., 149 (2017) 01004DOI: https://doi.org/10.1051/epjconf/201714901004