Gantenbein, G., Braune, H., Dammertz, G., Erckmann, V., Illy, S., Kern, S., Kasparek, W., Lechte, C., Leonhardt, W., Lievin, C., Michel, G., Noke, F., Purps, F., Samartsev, A., Schlaich, A., Schmid, M., & Thumm, M. (2011). Status of 1 MW, 140 GHz Series Gyrotrons for W7-X. Talk presented at 36th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2011). Houston, TX. 2011-10-02 - 2011-10-07.