[Table of Contents]

Plasma and Fusion Research

Volume 5, S2011 (2010)

Regular Articles

Electron Bernstein Waves at the WEGA Stellarator Heating and Emission
Matthias OTTE, Heinrich P. LAQUA, Enrico CHLECHOWITZ, Michael GLAUBITZ, Stefan MARSEN, Yuriy Y. PODOBA, Torsten STANGE, Friedrich WAGNER, Robert WOLF and Daihong ZHANG
Max-Planck-Institut für Plasmaphysik, EURATOM Ass., Greifswald branch, D-17491 Greifswald, Germany
(Received 7 December 2009 / Accepted 19 April 2010 / Published 10 December 2010)

Abstract

This paper gives an overview of recent results on the application of electron Bernstein waves for plasma heating and diagnostic purposes at the WEGA stellarator. By applying a two-step mode conversion process it was possible to reach over-dense argon and helium plasmas with central densities of above 0.97 × 1019 m−3 at a magnetic field strength of 0.5 T fully sustained by electrostatic Bernstein waves. An unexpected feature observed during the experiments was the detection of a strong increase of the radiation temperature associated with the existence of a super-thermal electron component in the keV-range during this heating period.

Keywords

stellarator, Bernstein wave, over-dense plasma, supra-thermal electron

DOI: 10.1585/pfr.5.S2011

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References

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This paper may be cited as follows:

Matthias OTTE, Heinrich P. LAQUA, Enrico CHLECHOWITZ, Michael GLAUBITZ, Stefan MARSEN, Yuriy Y. PODOBA, Torsten STANGE, Friedrich WAGNER, Robert WOLF and Daihong ZHANG, Plasma Fusion Res. 5, S2011 (2010).