Turbulent heating of parametric instabilities in unmagnetized plasmas

S. P. Kuo; B. R. Cheo

doi:10.1063/1.863499

Turbulent heating of parametric instabilities in unmagnetized plasmas

S. P. Kuo, B. R. Cheo

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Consideration of the effect of a uniform pump field on the particle orbits in a Vlasov plasma leads to a modified diffusion coefficient. When the particles oscillate in the pump field, the turbulent wave phase velocity seen by the particles is Doppler shifted by multiples of ω^• ₀/k (ω₀ is the pump frequency). Hence, strong interactions between the particles and various components of the turbulent field will take place. It is shown that when the pump field is sufficiently strong: E₀≥(4πn₀T_e)^1/2, bulk heating can dominate over tail heating and excitation of electrons to energy levels higher than the normal suprathermal values is possible. This field strength is within the range of laser fusion.

Original language	English (US)
Pages (from-to)	1104-1109
Number of pages	6
Journal	Physics of Fluids
Volume	24
Issue number	6
DOIs	https://doi.org/10.1063/1.863499
State	Published - 1981

ASJC Scopus subject areas

Computational Mechanics
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Fluid Flow and Transfer Processes

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abstract = "Consideration of the effect of a uniform pump field on the particle orbits in a Vlasov plasma leads to a modified diffusion coefficient. When the particles oscillate in the pump field, the turbulent wave phase velocity seen by the particles is Doppler shifted by multiples of ω• 0/k (ω0 is the pump frequency). Hence, strong interactions between the particles and various components of the turbulent field will take place. It is shown that when the pump field is sufficiently strong: E0≥(4πn0Te)1/2, bulk heating can dominate over tail heating and excitation of electrons to energy levels higher than the normal suprathermal values is possible. This field strength is within the range of laser fusion.",

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AB - Consideration of the effect of a uniform pump field on the particle orbits in a Vlasov plasma leads to a modified diffusion coefficient. When the particles oscillate in the pump field, the turbulent wave phase velocity seen by the particles is Doppler shifted by multiples of ω• 0/k (ω0 is the pump frequency). Hence, strong interactions between the particles and various components of the turbulent field will take place. It is shown that when the pump field is sufficiently strong: E0≥(4πn0Te)1/2, bulk heating can dominate over tail heating and excitation of electrons to energy levels higher than the normal suprathermal values is possible. This field strength is within the range of laser fusion.

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Turbulent heating of parametric instabilities in unmagnetized plasmas

Abstract

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