Coherent scattering of CO/sub 2/ light from ion-acoustic waves

Journal Article · Tue Nov 01 04:00:00 EST 1977 · Phys. Fluids; (United States)

OSTI ID:7209535

Peratt, A L; Watterson, R L; Derfler, H

Scattering of laser radiation from ion-acoustic waves in a plasma is investigated analytically and experimentally. The formulation predicts a coherent component of the scattered power on a largely incoherent background spectrum when the acoustic analog of Bragg's law and Doppler shift conditions are satisfied. The experiment consists of a hybrid CO/sub 2/ laser system capable of either low power continuous wave or high power pulsed mode operation. A heterodyne light mixing scheme is used to detect the scattered power. The proportionality predicted by the theory is verified by scattering from externally excited acoustic and ion-acoustic waves; continuous wave and pulsed modes in each case. Measurement of the ion-acoustic dispersion relation by continuous wave scattering is also presented.

• Research Organization: Max-Planck-Institut fuer Plasmaphysik, D-8046 Garching, Federal Republic of Germany
• OSTI ID: 7209535
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 20:11; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
ARGON
BRAGG REFLECTION
COHERENT SCATTERING
DISPERSION RELATIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
HOMOGENEOUS PLASMA
ION ACOUSTIC WAVES
ION WAVES
LASER RADIATION
LIGHT SCATTERING
NONMETALS
PLASMA
PLASMA WAVES
RADIATIONS
RARE GASES
REFLECTION
SCATTERING