A gyrokinetic calculation of transmission and reflection of the fast wave in the ion cyclotron range of frequencies

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860865· OSTI ID:6829272

Lashmore-Davies, C N; Fuchs, V; Dendy, R O ^[1]

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1. AEA Fusion, Culham Laboratory (Euratom/UKAEA Fusion Association), Abingdon, Oxfordshire, OX14 3DB (United Kingdom)

A full-wave equation has been obtained from the gyrokinetic theory for the fast wave traversing a minority cyclotron resonance [Phys. Fluids B [bold 4], 493 (1992)] with the aid of the fast wave approximation [Phys. Fluids [bold 31], 1614 (1988)]. This theory describes the transmission, reflection, and absorption of the fast wave for arbitrary values of the parallel wave number. For oblique propagation the absorption is due to both ion cyclotron damping by minority ions and mode conversion to the ion Bernstein wave. The results for a [sup 3]He minority in a D plasma indicate that for perpendicular propagation and minority temperatures of a few keV the power lost by the fast wave is all mode converted whereas for minority temperatures [similar to]100 keV[similar to]30% of the incident power is dissipated by the minority ions due to the gyrokinetic correction. The gyrokinetic correction also results in a significant reduction in the reflection coefficient for low field side incidence when [ital k][sub [ital z]L[ital B]][approx lt]1 and the minority and hybrid resonances overlap.

• OSTI ID: 6829272
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 5:1; ISSN 0899-8221; ISSN PFBPEI
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700350* -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
BERNSTEIN MODE
CLOSED PLASMA DEVICES
CYCLOTRON RESONANCE
DIFFERENTIAL EQUATIONS
DISPERSION RELATIONS
EQUATIONS
HEATING
ION CYCLOTRON-RESONANCE
LARMOR RADIUS
OSCILLATION MODES
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA HEATING
REFLECTION
RESONANCE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSMISSION
WAVE EQUATIONS