Measurements of absorption and Brillouin sidescattering from planar plasmas produced by 0. 53. mu. m laser light

Journal Article · Thu Jun 01 04:00:00 EDT 1989 · Phys Fluids B; (United States)

DOI:https://doi.org/10.1063/1.858953· OSTI ID:6026956

Drake, R P; Turner, R E; Lasinski, B F; Campbell, E M; Kruer, W L; Williams, E A; Kauffman, R L

A study of the absorption and scattering of laser light by planar, laser-produced plasmas is reported. Up to 4 kJ of 0.53 ..mu..m laser light irradiated thick, gold targets in 1 nsec pulses at intensities up to 4 x 10/sup 15/ W/cm/sup 2/. The absorption was determined from measurements of the scattered light by an array of about 100 detectors. Stimulated Brillouin sidescattering, identified by the angular distribution and spectrum of the scattered light, exceeded 10% of the laser energy for intensities above 10/sup 15/ W/cm/sup 2/. The observations are compared to those of previously reported experiments. It is suggested that a combination of collisional absorption, enhanced backscattering, and convective sidescattering produces the observed dependence on laser intensity.

• Research Organization: Lawrence Livermore National Laboratory, Livermore, California 94550
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6026956
• Journal Information: Phys Fluids B; (United States), Journal Name: Phys Fluids B; (United States) Vol. 1:6; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
700108 -- Fusion Energy-- Plasma Research-- Wave Phenomena
ABSORPTION
ANGULAR DISTRIBUTION
BRILLOUIN EFFECT
COHERENT SCATTERING
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ENERGY ABSORPTION
LASER-PRODUCED PLASMA
PLASMA
PLASMA DIAGNOSTICS
PULSES
RADIATIONS
SCATTERING
VISIBLE RADIATION