Rzesnicki T, Ioannidis ZC, Avramidis KA, Chelis I, Gantenbein G, Hogge J-P, Illy S, Jelonnek J, Jin J, Leggieri A, et al. Experimental Testing of the European TH1509U 170-GHz 1-MW CW Industrial Gyrotron-Long Pulse Operation. IEEE Electron Device Letters [Internet]. 2022;43:623-626.