Quasi-linear theory of parametric processes in unmagnetized plasma

Journal Article · Sat Sep 01 04:00:00 EDT 1979 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.862800· OSTI ID:6087729

Krapchev, V B

Large amplitude, spatially modulated high frequency waves produce a change in the low frequency properties of the plasma. These ponderomotive effects are studied with a quasi-linear theory of the Vlasov equation for general high frequency pump, sidebands, and low frequency waves. A ponderomotive correction to the Maxwellian distribution function is found to second order in the pump field. This ''renormalized'' distribution function exhibits the usual density self-modulation and an anisotropic change of temperature. A general dispersion relation is derived, which contains all previously known parametric processes and is correct to second order in the pump amplitude. The modifications in the stability analysis for the case of electron plasma wave scattered off an ion acoustic wave are examined.

• Research Organization: Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
• OSTI ID: 6087729
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 22:9; 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
BOLTZMANN-VLASOV EQUATION
DIFFERENTIAL EQUATIONS
DISPERSION RELATIONS
DISTRIBUTION FUNCTIONS
ELECTROMAGNETIC RADIATION
EQUATIONS
HOMOGENEOUS PLASMA
INSTABILITY
ION ACOUSTIC WAVES
ION WAVES
LORENTZ FORCE
MAXWELL EQUATIONS
PARAMETRIC INSTABILITIES
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA WAVES
RADIATIONS
RENORMALIZATION