Renormalized Compton scattering and nonlinear damping of collisionless drift waves
Journal Article
·
· Phys. Fluids; (United States)
A kinetic theory for the nonlinear damping of collisionless drift waves in a shear-free magnetic field is presented. The general formalism is a renormalized version of induced scattering on the ions and reduces correctly to weak turbulence theory. The approximation studied explicitly reduces to Compton scattering, systematizes and corrects the earlier calculations of Dupree and Tetreault (Phys. Fluids 21, 425 (1978)), and extends that theory to finite ion gyroradius. Certain conclusions differ significantly from those of Dupree and Tetreault. In particular, at long wavelengths the nonlinear ion growth rate is large and positive, proportional to k/sup 2//sub perpendicular/D both at zero and at finite gyroradius. (Here, k/sub perpendicular/ is the perpendicular wavenumber and D is the test particle diffusion coefficient.) Nevertheless, the rate of change of total mean kinetic energy due to the nonlinear interaction is small and proportional to q/sup 2//sub parallel/, where q/sub parallel/ is a typical parallel wavenumber.
- Research Organization:
- Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08544
- DOE Contract Number:
- EY-76-C-02-3073
- OSTI ID:
- 5583319
- Journal Information:
- Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 23:4; ISSN PFLDA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
BASIC INTERACTIONS
BOLTZMANN-VLASOV EQUATION
CHARGED PARTICLES
COLLISIONLESS PLASMA
COMPTON EFFECT
DAMPING
DIFFERENTIAL EQUATIONS
DISPERSION RELATIONS
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
EQUATIONS
FLUCTUATIONS
HEATING
INTERACTIONS
IONS
MAGNETIC FIELDS
MARKOV PROCESS
NONLINEAR PROBLEMS
PLASMA
PLASMA DRIFT
PLASMA HEATING
PLASMA WAVES
POISSON EQUATION
RENORMALIZATION
SCATTERING
STOCHASTIC PROCESSES
TURBULENCE
VARIATIONS
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
BASIC INTERACTIONS
BOLTZMANN-VLASOV EQUATION
CHARGED PARTICLES
COLLISIONLESS PLASMA
COMPTON EFFECT
DAMPING
DIFFERENTIAL EQUATIONS
DISPERSION RELATIONS
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
EQUATIONS
FLUCTUATIONS
HEATING
INTERACTIONS
IONS
MAGNETIC FIELDS
MARKOV PROCESS
NONLINEAR PROBLEMS
PLASMA
PLASMA DRIFT
PLASMA HEATING
PLASMA WAVES
POISSON EQUATION
RENORMALIZATION
SCATTERING
STOCHASTIC PROCESSES
TURBULENCE
VARIATIONS