Parametric decay of lower hybrid waves in a plasma: Effect of ion nonlinearity

Journal Article · Thu Feb 01 04:00:00 EST 1979 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.862581· OSTI ID:6503731

Tripathi, V K; Liu, C S; Grebogi, C

The contribution of ion nonlinearity to the coupling coefficients for parametric decay, quasi-mode decay, oscillating two-stream instability, and modulational instability of a lower hybrid pump (k/sub 0/not =0) has been obtained by solving the full Vlasov equation for magnetized ions. It is seen that the contribution of ions is important only for decay into a Bernstein wave of short perpendicular wavelength (..omega..>>k/sub z/v/sub e/, k/sub perpendicular/rho/sub i/>>1). A comparative study of various channels of decay reveals that the oscillating two-stream instability and nonlinear Landau damping by electrons are the predominant channels in the high density region. Modulational instability and the decay into an ion acoustic wave are seen to be irrelevant to tokamaks.

• Research Organization: Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742
• OSTI ID: 6503731
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 22:2; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107 -- Fusion Energy-- Plasma Research-- Instabilities
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
BERNSTEIN MODE
BOLTZMANN-VLASOV EQUATION
CLOSED PLASMA DEVICES
DAMPING
DIFFERENTIAL EQUATIONS
ELECTRIC POTENTIAL
ELECTRON DENSITY
ELECTRON PLASMA WAVES
ELECTRONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FLUCTUATIONS
INSTABILITY
ION PLASMA WAVES
ION WAVES
LANDAU DAMPING
LEPTONS
NONLINEAR PROBLEMS
OSCILLATION MODES
PARAMETRIC INSTABILITIES
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA MICROINSTABILITIES
PLASMA WAVES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TWO-STREAM INSTABILITY
VARIATIONS