ARGUS laser plasma experiments at 1. 06. mu. m, 0. 53. mu. m and 0. 35. mu. m
ARGUS wavelength scaling experiments have been performed on low (Be) and high (Au) Z disk targets, with laser wavelengths of 1.06 ..mu..m, 0.53 ..mu..m and 0.35 ..mu..m. The laser provided a 700 psec pulse, with up to 100J and 1.06 ..mu..m; 200J at 0.53 ..mu..m; and 40J at 0.35 ..mu..m. Laser intensities on target ranged from 3 x 10/sup 13/ to over 3 x 10/sup 15/W/cm/sup 2/, using an f/2.2 focusing system. Box calorimeter measurements show the expected increasing fractional absorption at shorter laser wavelengths; absolutely calibrated hard x-ray detectors show the number of suprathermal electrons to be greatly decreased. Scattered light measurements concentrated on stimulated Raman scattering, and the 3/2 harmonic. The SRS was spectrally and temporally resolved during 0.53 ..mu..m irradiations; our measurements showed the scattering to be principally from the convective instability, near tenth critical density. Near ..omega../2, a double peaked spectral feature is observed. The time resolved data show a number of interesting features, which are discussed.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5601159
- Report Number(s):
- UCRL-86911; CONF-820119-2; ON: DE82006859; TRN: 82-008469
- Resource Relation:
- Conference: 15. European conference on laser interaction with matter, Garching, F.R. Germany, 18 Jan 1982
- Country of Publication:
- United States
- Language:
- English
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