Leggieri A, Alberti S, Avramidis KA, Dammertz G, Erckmann V, Gantenbein G, Hogge J-P, Illy S, Ioannidis Z, Jelonnek J, et al. THALES TH1507 140 GHz 1 MW CW gyrotron for W7-X stellarator. In: International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz. Vol. 2019-September. ; 2019.