Wilde, F., Laqua, H. P., Marsen, S., Stange, T., Avramidis, K. A., Gantenbein, G., et al. (2017). Measurements of Satellite Modes in 140 GHz Wendelstein 7-X Gyrotrons: an Approach to an Electronic Stability Control. Talk presented at 18th International Vacuum Electronics Conference (IVEC 2017). London. 2017-04-24 - 2017-04-26.