Brillouin and dielectric sidescatter of 10-. mu. m light by a plasma
Journal Article
·
· J. Appl. Phys.; (United States)
Sidescatter of CO/sub 2/ laser light from underdense, laser-heated plasmas in H/sub 2/ and He is observed at theta=90/sup 0/. Spectrum, exponentiation, isotropy, and polarization measurements are used to deconvolve two separate mechanisms: (1) Doppler-shifted reflections from moving dielectric discontinuities created in the laser-ionization process, and (2) Stimulated Brillouin scattering seeded by these reflections. The dielectric sidescatter is unpolarized and azimuthally symmetric, similar to the diffuse component of scattering in solid-target experiments. The Brillouin sidescatter saturates at a low level corresponding to an ion wave amplitude of 0.1--1.0%, consistent with previous data on the saturation of backscatter.
- Research Organization:
- Electrical Sciences and Engineering Department, University of California, Los Angeles, California 90024
- OSTI ID:
- 5205862
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 51:8; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700100* -- Fusion Energy-- Plasma Research
BRILLOUIN EFFECT
CARBON DIOXIDE LASERS
COHERENT SCATTERING
CRYOGENIC FLUIDS
DATA
DIELECTRIC PROPERTIES
DOPPLER EFFECT
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GAS LASERS
HEATING
HELIUM
HYDROGEN
INFORMATION
INFRARED RADIATION
ISOTROPY
LASER-RADIATION HEATING
LASERS
MATHEMATICAL MODELS
NONMETALS
NUMERICAL DATA
PHYSICAL PROPERTIES
PLASMA
PLASMA HEATING
POLARIZATION
RADIATIONS
RARE GASES
REFLECTION
SCATTERING
SPECTRA
SYMMETRY
TARGETS
700100* -- Fusion Energy-- Plasma Research
BRILLOUIN EFFECT
CARBON DIOXIDE LASERS
COHERENT SCATTERING
CRYOGENIC FLUIDS
DATA
DIELECTRIC PROPERTIES
DOPPLER EFFECT
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GAS LASERS
HEATING
HELIUM
HYDROGEN
INFORMATION
INFRARED RADIATION
ISOTROPY
LASER-RADIATION HEATING
LASERS
MATHEMATICAL MODELS
NONMETALS
NUMERICAL DATA
PHYSICAL PROPERTIES
PLASMA
PLASMA HEATING
POLARIZATION
RADIATIONS
RARE GASES
REFLECTION
SCATTERING
SPECTRA
SYMMETRY
TARGETS