Tokamak plasma heating with intense pulsed ion beams
The temporal evolution of the temperature profile of an rf heated plasma torus is calculated. The model includes the following effects: (1) inward energy transport by externally launched lower hybrid waves which Landau damp and heat the plasma as they propagate from the plasma edge to the vicinity of the lower hydrid resonance where the remainder of their energy is deposited; (2) quasilinear plateau formation and the competing effect of Fokker-Planck collisions; (3) electron and ion thermal conductivity; and (4) temperature equilibration. The implications of various models of the thermal conductivity (neoclassical, pseudoclassical, and anomalous) and of the heat deposition near the resonance (mode conversion, parametric instabilities, etc.) are investigated. It is found that quasilinear flattening is effective in reducing the Landau damping of the lower hybrid waves and thereby prevents large amounts of energy from being deposited in the outer regions of the plasma.
- Research Organization:
- Naval Research Lab., Washington, D.C. (USA)
- DOE Contract Number:
- E(49-20)-1006
- OSTI ID:
- 7250251
- Report Number(s):
- CONF-760637-2; TRN: 77-000896
- Resource Relation:
- Conference: 3. international meeting on theoretical and experimental aspects of heating of toroidal plasmas, Grenoble, France, 26 Jun 1976
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HIGH-FREQUENCY HEATING
PLASMA WAVES
ELECTRON DENSITY
HYBRID RESONANCE
ENERGY TRANSFER
FOKKER-PLANCK EQUATION
LANDAU DAMPING
MATHEMATICAL MODELS
PARAMETRIC INSTABILITIES
QUASILINEAR PROBLEMS
THERMAL CONDUCTIVITY
DAMPING
DIFFERENTIAL EQUATIONS
EQUATIONS
HEATING
INSTABILITY
PHYSICAL PROPERTIES
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RESONANCE
THERMODYNAMIC PROPERTIES
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production
700108 - Fusion Energy- Plasma Research- Wave Phenomena