Published July 10, 2009
| Version v1
Journal article
Energetic-Electron-Driven Instability in the Helically Symmetric Experiment
Creators
- 1. Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, California 90095 (United States)
- 2. Institute for Fusion Studies, University of Texas, Austin, Texas 78712 (United States)
- 3. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- 4. Department of Electrical and Computer Engineering, University of Wisconsin, Madison, Wisconsin 53706 (United States)
Description
Energetic electrons generated by electron cyclotron resonance heating are observed to drive instabilities in the quasihelically symmetric stellarator device. The coherent, global fluctuations peak in the plasma core and are measured in the frequency range of 20-120 kHz. Mode propagation is in the diamagnetic drift direction of the driving species. When quasihelical symmetry is broken, the mode is no longer observed. Experimental observations indicate that the unstable mode is acoustic rather than Alfvenic.
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 103
- Journal Issue
- 2
- Journal Page Range
- p. 025003-025003.4
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 41078240
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- ECR HEATING; INSTABILITY; KHZ RANGE; PLASMA; SYMMETRY; SYMMETRY BREAKING; TAIL ELECTRONS
- Descriptors DEC
- ELECTRONS; ELEMENTARY PARTICLES; FERMIONS; FREQUENCY RANGE; HEATING; HIGH-FREQUENCY HEATING; LEPTONS; PLASMA HEATING
Optional Information
- Notes
- (c) 2009 The American Physical Society