Characterization of heat transport and radiation hydrodynamics in collisional laser plasmas using collective Thomson scattering
The author proposes using the collective Thomson scattering lineshape from ion acoustic waves to measure the spatial structure of local heat transport parameters and collisionality. Ion acoustic peak height asymmetry is used in conjunction with a recently developed model describing the effects of collisional and Landau damping contributions on the low-frequency electron density fluctuation spectrum to extract the relative electron drift. The local heat flux q{sub e} (proportional to drift) and the electron thermal conductivity {kappa}{sub e}{minus}q{sub e}/{gradient}T{sub e} would be inferred from experimentally determined temperature gradients {gradient}T{sub e}. Damping of the entropy wave component at zero mode frequency is shown to be an estimate of the ion thermal conductivity {kappa}{sub i}, and its visibility is a direct measure of the ion-ion mean free path {lambda}{sub ii}.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000; W-7405-ENG-48
- OSTI ID:
- 10189720
- Report Number(s):
- SAND--93-2182C; CONF-9310195--1; ON: DE94001502; BR: GB0103012
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
700300
700320
700411
HEAT FLUX
HEAT TRANSFER
INERTIAL CONFINEMENT
INERTIAL CONFINEMENT DEVICES
ION ACOUSTIC WAVES
LANDAU DAMPING
LASER-PRODUCED PLASMA
LINE BROADENING
PLASMA DIAGNOSTIC TECHNIQUES AND INSTRUMENTATION
PLASMA DIAGNOSTICS
PLASMA PHYSICS AND FUSION RESEARCH
TEMPERATURE GRADIENTS
THERMAL CONDUCTIVITY
THOMSON SCATTERING