Gantenbein, G., Erckmann, V., Illy, S., Kern, S., Kasparek, W., Lechte, C., et al. (2010). 140 GHz, 1 MW CW Gyrotron Development for the ECH System of the Stellarator W7-X. Talk presented at 35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010). Rome. 2010-09-05 - 2010-09-10.