A line-of-sight electron cyclotron emission receiver for electron cyclotron resonance heating feedback control of tearing modes

Journal Article · Mon Sep 15 00:00:00 EDT 2008 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2976665· OSTI ID:21266422

Oosterbeek, J W; Buerger, A ^[1]; Westerhof, E; Baar, M R. de; Berg, M A. van den; Bongers, W A; Graswinckel, M F; Hennen, B A; Kruijt, O G; Thoen, J ^[2]; Heidinger, R ^[3]; Korsholm, S B; Leipold, F; Nielsen, S K ^[4]

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1. Forschungszentrum Juelich GmbH, Institut fuer Energieforschung-Plasmaphysik, Association EURATOM-FZJ, 52425 Juelich (Germany)
2. FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, postbus 1207, 3430 BE Nieuwegein (Netherlands)
3. Forschungszentrum Karlsruhe, Institut fuer Materialforschung I, Association EURATOM-FZK, P.O. Box 3640, D-76021 Karlsruhe (Germany)
4. EURATOM-Risoe National Laboratory for Sustainable Energy, Technical University of Denmark, DK-4000 Roskilde (Denmark)

An electron cyclotron emission (ECE) receiver inside the electron cyclotron resonance heating (ECRH) transmission line has been brought into operation. The ECE is extracted by placing a quartz plate acting as a Fabry-Perot interferometer under an angle inside the electron cyclotron wave (ECW) beam. ECE measurements are obtained during high power ECRH operation. This demonstrates the successful operation of the diagnostic and, in particular, a sufficient suppression of the gyrotron component preventing it from interfering with ECE measurements. When integrated into a feedback system for the control of plasma instabilities this line-of-sight ECE diagnostic removes the need to localize the instabilities in absolute coordinates.

• OSTI ID: 21266422
• Journal Information: Review of Scientific Instruments, Vol. 79, Issue 9; Other Information: DOI: 10.1063/1.2976665; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CONTROL
CYCLOTRONS
ECR HEATING
ELECTRONS
EMISSION
FABRY-PEROT INTERFEROMETER
FEEDBACK
TEARING INSTABILITY
TOKAMAK DEVICES