Electron heat transport down steep temperature gradients
Journal Article
·
· Phys. Rev. Lett.; (United States)
Electron heat transport is studied by numerically solving the Fokker-Planck equation, with a spherical harmonic representation of the distribution function. The first two terms (f/sub 0/, f/sub 1/) suffice, even in steep temperature gradients. Deviations from the Spitzer-Haerm law appear for lambda/L/sub T/ ((mean free path)/(temperature gradient length))> or approx. =0.01, as a result of non-Maxwellian f/sub 0/. For lambda/L/sub T/> or approx. =1, the heat flux is (1/3) of the free-streaming value. In intermediate cases, a harmonic law describes well the hottest part of the plasma.
- Research Organization:
- Institut National de la Recherche Scientifique -Energie, Universite du Quebec, Varennes, Quebec J0L 2P0, Canada
- OSTI ID:
- 6399357
- Journal Information:
- Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 49:26; ISSN PRLTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
COLLISIONS
DATA
DIFFERENTIAL EQUATIONS
DISTRIBUTION FUNCTIONS
ELECTRON COLLISIONS
ENERGY TRANSFER
EQUATIONS
FOKKER-PLANCK EQUATION
FUNCTIONS
HEAT FLUX
HEAT TRANSFER
HOT PLASMA
INFORMATION
LASER-PRODUCED PLASMA
MEAN FREE PATH
NUMERICAL DATA
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
PHYSICAL PROPERTIES
PLASMA
PLASMA SIMULATION
SIMULATION
SPHERICAL HARMONICS METHOD
SPITZER THEORY
STEADY-STATE CONDITIONS
TEMPERATURE GRADIENTS
THEORETICAL DATA
THERMODYNAMIC PROPERTIES
TRANSIENTS
700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
COLLISIONS
DATA
DIFFERENTIAL EQUATIONS
DISTRIBUTION FUNCTIONS
ELECTRON COLLISIONS
ENERGY TRANSFER
EQUATIONS
FOKKER-PLANCK EQUATION
FUNCTIONS
HEAT FLUX
HEAT TRANSFER
HOT PLASMA
INFORMATION
LASER-PRODUCED PLASMA
MEAN FREE PATH
NUMERICAL DATA
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
PHYSICAL PROPERTIES
PLASMA
PLASMA SIMULATION
SIMULATION
SPHERICAL HARMONICS METHOD
SPITZER THEORY
STEADY-STATE CONDITIONS
TEMPERATURE GRADIENTS
THEORETICAL DATA
THERMODYNAMIC PROPERTIES
TRANSIENTS