PT Unknown AU Stober, J Wagner, D Kircher, M Leuterer, F Monaco, F Münich, M Schrepfer, G Schubert, M Schütz, H Zohm, H Gantenbein, G Jelonnek, J Thumm, M Meier, A Scherer, T Strauss, D Kasparek, W Lechte, C Plaum, B Zach, A Litvak, AG Denisov, GG Zapevalov, V Chirkov, A Malygin, V Popov, LG Nichiporenko, VO Myasnikov, VE Tai, EM Solyanova, EA Malygin, SA AU ASDEX UG team TI Status of the Extended Multi-Frequency ECRH System at ASDEX Upgrade PY 2017 LA english ER