Braune, H., Erckmann, V., Laqua, H. P., Michel, G., Noke, F., Purps, F., Schulz, T., Wagner, D., W7-X ECRH Team at IPP, W7-X ECRH Team at IPF, & W7-X ECRH Team at KIT (2011). Gyrotron High Power Long Pulse Operation - Challenges and Solutions. Talk presented at 23rd Joint Russian-German Workshop on ECRH and Gyrotrons. Karlsruhe, Stuttgart, Garching. 2011-05-23 - 2011-05-28.