Strong electron dissipation by a mode converted ion hybrid (Bernstein) wave

Journal Article · Thu Feb 01 00:00:00 EST 1996 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.49527· OSTI ID:285379

Lashmore-Davies, C N ^[1]; Fuchs, V ^[2]; Ram, A K ^[3]

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1. UKAEA Government Division, Fusion, Culham, Abingdon, Oxon, OX14 3DB (United Kingdom) UKAEA/Euratom Fusion Association
2. Centre Canadien de Fusion Magnetique, Varennes, Quebec, J3X 1S1 (CANADA)
3. Plasma Fusion Center, MIT, Cambridge, Massachusetts 02139, (United States)

The fast wave approximation, extended to include the effects of electron dissipation, is used to calculate the power mode converted to the ion hybrid (Bernstein) wave in the vicinity of the ion hybrid resonance. The power absorbed from the fast wave by ion cyclotron damping and by electron Landau and transit time damping (including cross terms) is also calculated. The fast wave equation is solved for either the Budden configuration of a cut-off-resonance pair or the triplet configuration of cut-off-resonance-cut-off. The fraction mode converted is compared for the triplet case and the Budden multi-pass situation. The electron damping rate of the ion hybrid wave is obtained from the local dispersion relation and a ray tracing code is used to calculate the damping of the mode converted ion hybrid wave by the electrons as it propagates away from the resonance. Quantitative results for a range of conditions relevant to JET, TFTR and ITER are given. {copyright} {ital 1996 American Institute of Physics.}

• Research Organization: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: FG02-91ER54109
• OSTI ID: 285379
• Report Number(s): CONF-9505105-; ISSN 0094-243X; TRN: 96:023794
• Journal Information: AIP Conference Proceedings, Vol. 355, Issue 1; Conference: 11. topical conference on radio frequency in plasmas, Palm Springs, CA (United States), 17-19 May 1995; Other Information: PBD: Feb 1996
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
BERNSTEIN MODE
MATHEMATICAL MODELS
TOKAMAK DEVICES
ION WAVES
MODE CONVERSION
HYBRID RESONANCE
DAMPING
ELECTRON DENSITY
WAVE PROPAGATION
CUT-OFF
RAY TRACING