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

Journal Article · Thu Feb 01 04:00:00 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 Institute of Technology
• Sponsoring Organization: USDOE
• DOE Contract Number: FG02-91ER54109
• OSTI ID: 285379
• Report Number(s): CONF-9505105--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 355; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

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