Lower hybrid wave propagation and absorption in inhomogeneous plasmas
Journal Article
·
· Phys. Fluids; (United States)
The high-frequency dielectric tensor for a cold, multispecies, current-carrying plasma is derived in straight-tokamak geometry, including both toroidal and poloidal magnetic fields in the equilibrium. Propagation and resonant absorption of lower hybrid waves in an inhomogeneous plasma column are investigated. The earlier treatment of Grossman and Weitzner (Phys. Fluids 27, 1699 (1984)) of the resonant-layer solutions, power absorption and energy partition, and accessibility of the lower hybrid wave is generalized to include the effects of mode propagation parallel to the magnetic field and of an equilibrium plasma current. In particular, the density gradient coupled to the finite poloidal mode number and parallel wavenumber allows the lower hybrid wave to reach the hybrid layer, unlike the case of an infinite homogeneous plasma. Finally, the eigenvalue problem is solved for a homogeneous plasma column carrying zero current, and surrounded by a vacuum region delimited by a perfectly conducting shell.
- Research Organization:
- Plasma Physics Section, Saha Institute of Nuclear Physics, Block AF, Sector 1, Salt Lake, Calcutta 700064, India
- OSTI ID:
- 7043728
- Journal Information:
- Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 31:8; ISSN PFLDA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101 -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
ABSORPTION
ANNULAR SPACE
CLOSED PLASMA DEVICES
COLD PLASMA
CONFIGURATION
ENERGY ABSORPTION
EQUILIBRIUM
HEATING
HIGH-FREQUENCY HEATING
INHOMOGENEOUS PLASMA
LOWER HYBRID HEATING
MAGNETIC FIELD CONFIGURATIONS
PLASMA
PLASMA DENSITY
PLASMA HEATING
RF SYSTEMS
SPACE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TOROIDAL CONFIGURATION
700101 -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
ABSORPTION
ANNULAR SPACE
CLOSED PLASMA DEVICES
COLD PLASMA
CONFIGURATION
ENERGY ABSORPTION
EQUILIBRIUM
HEATING
HIGH-FREQUENCY HEATING
INHOMOGENEOUS PLASMA
LOWER HYBRID HEATING
MAGNETIC FIELD CONFIGURATIONS
PLASMA
PLASMA DENSITY
PLASMA HEATING
RF SYSTEMS
SPACE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TOROIDAL CONFIGURATION