Thumm, M., Arnold, A., Dammertz, G., Michel, G., Pretterebner, J., Wagner, D., et al. (2004). Highly Efficient Quasi-optical Mode Converter System for a 1 MW, 140 GHZ, CW Gyrotron. Talk presented at 13th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating (EC-13). Nizhny Novgorod. 2004-05-17 - 2004-05-20.