Plasma rotation and rf heating in DIII-D

Journal Article · Mon Sep 20 00:00:00 EDT 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.59722· OSTI ID:21210439

DeGrassie, J S; Baker, D R; Burrell, K H; Greenfield, C M; Lin-Liu, Y R; Luce, T C; Petty, C C; Prater, R ^[1]; Heidbrink, W W ^[2]; Rice, B W ^[3]

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1. General Atomics, P.O. Box 85608, San Diego, California 92186-5698 (United States)
2. University of California, Irvine, California 992697 (United States)
3. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)

In a variety of discharge conditions on DIII-D it is observed that rf electron heating reduces the toroidal rotation speed and core ion temperature. The rf heating can be with either fast wave or electron cyclotron heating and this effect is insensitive to the details of the launched toroidal wavenumber spectrum. To date all target discharges have rotation first established with co-directed neutral beam injection. A possible cause is enhanced ion momentum and thermal diffusivity due to electron heating effectively creating greater anomalous viscosity. Another is that a counter directed toroidal force is applied to the bulk plasma via rf driven radial current.

• OSTI ID: 21210439
• Journal Information: AIP Conference Proceedings, Vol. 485, Issue 1; Conference: 13. topical conference on radio frequency power in plasmas, Annapolis, MD (United States), 12-14 Apr 1999; Other Information: DOI: 10.1063/1.59722; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM INJECTION HEATING
DOUBLET-3 DEVICE
ECR HEATING
ELECTRON TEMPERATURE
ELECTRONS
ION TEMPERATURE
NEUTRAL ATOM BEAM INJECTION
PLASMA
PLASMA INSTABILITY
RF SYSTEMS
ROTATION
THERMAL DIFFUSIVITY
VISCOSITY