The Multi-Frequency ECRH System at ASDEX Upgrade - Current Status and Plans -

Last year, two more two-frequency 1 MW gyrotrons have been installed and put into operation at ASDEX Upgrade. In total 6 gyrotrons were in operation in the last experimental campaign. This year, two more gyrotrons will be installed which will bring the upgraded ECRH system to its completion. The system upgrade also includes technological advances in subsystems and loads as well as new concepts for passive protection of in-vessel components against ECRH stray radiation.