Electron cyclotron power absorption in plasmas with non-Maxwellian electron velocity distributions

Conference · Sat Oct 15 00:00:00 EDT 1994 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:7260991

Yue, S; Kritz, A H ^[1]; Smith, G R ^[2]

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1. Lehigh University, Bethlehem, Pennsylvania 18015 (United States)
2. Lawrence Livermore National Labortory, Livermore, California 94551 (United States)

Tokamaks with sufficiently strong supplementary heating develop non-Maxwellian electron velocity distributions. Because the absorption of electron cyclotron power is proportional to [del][sub V][ital f], even small deviations from a Maxwellian distribution can significantly affect power deposition. Following an approach used to study microinstabilities in a plasma with an arbitrary, numerically specified, electron distribution, we have developed a computational module to study electron cyclotron power deposition in plasmas that have distributions motivated by those in actual tokamaks. Also, we compare the deposition results obtained using an energy balance approach with those obtained using a Taylor expansion of the dielectric tensor. We illustrate the limitations of the latter approach.

• DOE Contract Number: FG02-92ER54141; W-7405-ENG-48
• OSTI ID: 7260991
• Report Number(s): CONF-9304112-; CODEN: APCPCS
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 289:1; Conference: 10. topical conference on radio frequency power in plasmas, Boston, MA (United States), 1-3 Apr 1993; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA
ECR HEATING
ABSORPTION
BOLTZMANN STATISTICS
COMPARATIVE EVALUATIONS
COMPUTER CODES
DIELECTRIC TENSOR
ELECTRONS
ENERGY BALANCE
MAGNETIC FIELDS
RELATIVISTIC RANGE
SERIES EXPANSION
TOKAMAK DEVICES
CLOSED PLASMA DEVICES
ELEMENTARY PARTICLES
ENERGY RANGE
EVALUATION
FERMIONS
HEATING
HIGH-FREQUENCY HEATING
LEPTONS
PLASMA HEATING
SORPTION
TENSORS
THERMONUCLEAR DEVICES
700350* - Plasma Production
Heating
Current Drive
& Interactions- (1992-)