ECRH and ECCD with high power gyrotrons at the stellarators W7-AS and W7-X

Electron cyclotron resonance heating (ECRH) plays a key role in stellarator research, because it provides net current free plasma start up and heating toward reactor relevant plasma parameters. ECRH was extensively used and investigated in the stellarator experiments at IPP Garching, i.e., the W7-A...

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Bibliographic Details
Published in:IEEE transactions on plasma science 1999-04, Vol.27 (2), p.538-546
Main Authors: Erckmann, V., Dammertz, G., Dorst, D., Empacher, L., Forster, W., Gantenbein, G., Geist, T., Kasparek, W., Laqua, H.P., Muller, G.A., Thumm, M., Weissgerber, M., Wobig, H.
Format: Article
Language:English
Subjects:
Cyclotrons
Demand
Electron cyclotron resonance
Electrons
Gyrotrons
Heating
Inductors
Instruments
Physics
Plasma
Plasma (physics)
Plasmas
Polypropylenes
Resonance
Solids
Stellarators
Superconducting transmission lines
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Summary:Electron cyclotron resonance heating (ECRH) plays a key role in stellarator research, because it provides net current free plasma start up and heating toward reactor relevant plasma parameters. ECRH was extensively used and investigated in the stellarator experiments at IPP Garching, i.e., the W7-A and the W7-AS stellarators. These experiments provide a solid physics and technological basis for the 10 MW, CW ECRH system, which is under construction for the superconducting next step stellarator W7-X and will become operational in 2005. We briefly describe some of the major stellarator specific physics results on ECRH and electron cyclotron (EC)-current drive from W7-A and W7-AS. The scientific goals and the design of W7-X are outlined together with the demands for the ECRH system, which is the main heating system in the first stage of the experiment. The present status of the ECRH engineering design including the gyrotrons, all auxiliary systems, the transmission line, and the launching system are presented.
ISSN:0093-3813
1939-9375
DOI:10.1109/27.772283