Ruess S, Avramidis K, Gantenbein G, Illy S, Pagonakis IG, Rzesnicki T, Thumm M, Jelonnek J. Proposal of an inverse magnetron injection gun for future hollow-cylindrical-cavity high power gyrotrons. In: International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz. Vol. 2016-November. ; 2016.