Recent progress in the upgrade of the TCV EC-system with two 1MW/2s dual-frequency (84/126GHz) gyrotrons
1 Ecole Polytechnique Fédérale de Lausanne (EPFL), SPC, CH-1015, Lausanne, Switzerland
2 IHM, Karlsruhe Institute of Technology (KIT), Kaiserstrasse 12, D-76131, Karlsruhe, Germany
3 Institute of Plasma Physics “P. Caldirola”, National Research Council of Italy, Milano, Italy
4 Institute for Interfacial Process Engineering and Plasma Technology, University of Stuttgart, D-70569 Stuttgart, Germany
5 Thales Electron Devices, Vélizy-Villacoublay, France
6 PPPT Power Plant Physics and Technology EUROfusion, D-85748 Garching, Germany
7 Department of OptoMechatronics, TNO Technical Sciences, NL-2600 AD, Delft, The Netherlands
* Corresponding author: firstname.lastname@example.org
Published online: 23 October 2017
The upgrade of the EC-system of the TCV tokamak has entered in its realization phase and is part of a broader upgrade of TCV. The MW-class dual-frequency gyrotrons (84 or 126GHz/2s/1MW) are presently being manufactured by Thales Electron Devices with the first gyrotron foreseen to be delivered at SPC by the end of 2017. In parallel to the gyrotron development, for extending the level of operational flexibility of the TCV EC-system the integration of the dual-frequency gyrotrons adds a significant complexity in the evacuated 63.5mm-diameter HE11 transmission line system connected to the various TCV low-field side and top launchers. As discussed in , an important part of the present TCV-upgrade consists in inserting a modular closed divertor chamber. This will have an impact on the X3 top-launcher which will have to be reduced in size. For using the new compact launcher we are considering employing a Fast Directional Switch (FADIS), combining the two 1MW/126GHz/2s rf-beams into a single 2MW rf-beam.
© The authors, published by EDP Sciences, 2017
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