Electron energy transport in ion waves and its relevance to laser-produced plasmas
Electron energy transport in plasmas is examined in the context of ion waves which are intermediate between collisionless isothermal ion acoustic waves and collisional adiabatic sound waves. The conductivity is found to be much less than the Spitzer-Haerm result for wavelengths less than 1000 electron mean free paths. This is expected to be relevant to laser-produced ablating plasmas in which the temperature can vary considerably over a distance of 10 to 100 mean free paths. The reduction in conductivity is independent of the wave amplitude thus differing from the reduction due to saturation found recently by numerical solution of the Fokker--Planck equation. At short wavelengths the heat flow approaches an upper limit which depends on the phase velocity of the wave. Diffusive ion wave damping is strong over a large range of wavelengths.
- Research Organization:
- Science and Engineering Research Council, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 OQX, United Kingdom
- OSTI ID:
- 6521830
- Journal Information:
- Phys. Fluids; (United States), Vol. 26:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ION WAVES
DAMPING
DIFFUSION
LASER-PRODUCED PLASMA
ENERGY TRANSPORT
AMPLITUDES
DISPERSION RELATIONS
ELECTRIC CONDUCTIVITY
ELECTRONS
HEAT TRANSFER
ION ACOUSTIC WAVES
MEAN FREE PATH
PHASE VELOCITY
SOUND WAVES
SPITZER THEORY
TEMPERATURE GRADIENTS
ELECTRICAL PROPERTIES
ELEMENTARY PARTICLES
ENERGY TRANSFER
FERMIONS
LEPTONS
PHYSICAL PROPERTIES
PLASMA
PLASMA WAVES
VELOCITY
700105* - Fusion Energy- Plasma Research- Plasma Kinetics-Theoretical- (-1987)
700108 - Fusion Energy- Plasma Research- Wave Phenomena