EPJ Web of Conferences 32, 04008 (2012)
https://doi.org/10.1051/epjconf/20123204008

Status of Resonant Diplexer Development for high-power ECRH Applications

¹ Institut für Plasmaforschung, Universität Stuttgart, D-70569 Stuttgart, Germany
² Max-Planck-Institut für Plasmaphysik, EURATOM Association D-17491 Greifswald, and D-85748 Garching, Germany
³ Department of OptoMechatronics, TNO Technical Sciences, NL-2600 AD, Delft, The Netherlands
⁴ Dutch Institute For Fundamental Energy Research, NL-3430 BE Nieuwegein, The Netherlands
⁵ Inst. of Applied Physics, Russian Academy of Science, 603950 Nizhny Novgorod, Russia
⁶ Istituto di Fisica del Plasma, EURATOM-ENEA-CNR Association, I-20125 Milano, Italy
⁷ Japan Atomic Energy Agency (JAEA), 801-1, Mukoyama, Naka, Ibaraki 311-0193, Japan

Abstract

Characteristics of ring resonator diplexers for high-power ECRH are briefly reviewed. Commissioning experiments performed on ASDEX Upgrade with the diplexer Mk IIa are presented, which demonstrate slow and fast switching of the power between two launchers, and thus the capability for efficient suppression of neoclassical tearing modes and simultaneous central heating of the plasma. The development of the compact diplexer Mk IIIb is discussed, and test results are presented. Finally, an evacuated design for 170 GHz is shown.