Observation of laser-induced anisotropy in ion acoustic waves in a plasma

Journal Article · Mon Apr 20 04:00:00 EDT 1987 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.58.1644· OSTI ID:6896995

Bernard, J E; Baldis, H A; Villeneuve, D M; Langdon, A B

Temporally and spectrally resolved, large-angle Thomson scattering was used to measure the frequency of thermal ion acoustic waves in a plasma in the presence of a high-frequency (..omega../sub 0/>..omega../sub pe/) laser beam. At high laser intensities (v/sub osc//v/sub e/approx. >4), the frequency of the short-wavelength ion acoustic waves (klambda/sub D//sub e/ = 0.3-1.2) which propagated parallel to the electric field of the laser (i.e., parallel to the oscillation velocity of the quivering electrons) was observed to be larger than the frequency of those waves which propagated perpendicular to the electric field (anisotropic sound). The measured frequency ratios are found to be in good agreement with the predictions of theory.

• Research Organization: Division of Physics, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada
• OSTI ID: 6896995
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 58:16; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ANISOTROPY
ELECTROMAGNETIC RADIATION
FLUCTUATIONS
INELASTIC SCATTERING
ION ACOUSTIC WAVES
ION WAVES
LASER RADIATION
PHOTOGRAPHY
PHYSICAL PROPERTIES
PLASMA
PLASMA DIAGNOSTICS
PLASMA WAVES
RADIATIONS
RESOLUTION
SCATTERING
STREAK PHOTOGRAPHY
THERMODYNAMIC PROPERTIES
THOMSON SCATTERING
VARIATIONS