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Proceedings Paper

Soft x-ray laser-based moire deflectometry of dense plasmas
Author(s): Franz A. Weber; Troy W. Barbee; Peter M. Celliers; Luiz Barroca Da Silva; Kazuo A. Tanaka; Ryosuke Kodama; Kenjiro Takahashi
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Paper Abstract

Soft x-ray laser based Moire deflectometry has been shown to be a viable and useful diagnostic for probing dense plasmas relevant to inertial confinement fusion (ICF). Collisionally pumped soft x-ray lasers are thereby used as reliable radiation sources which provide unique intensity and coherence characteristics in the soft x-ray region in order to overcome the adverse effects of absorption and refraction of the probe beam in the plasma. We present results obtained from Moire deflectometry experiments carried out at the ILE Gekko XII laser facility where the neon-like germanium x-ray laser with line emission at 196 angstrom has been used to probe laser produced plasmas created from 100 micrometer thick CH targets. Besides a high brightness the x-ray laser exhibits small beam divergence (less than 4 mrad) and short pulse duration of about 80 ps. The results show that peak electron densities of 3 X 1021 cm-3 at the initial target surface can be probed with this diagnostic technique, however, no convincing evidence was found for channel formation in the plasma caused by a 1 (omega) (1.053 micrometer) drill beam.

Paper Details

Date Published: 1 November 1997
PDF: 9 pages
Proc. SPIE 3156, Soft X-Ray Lasers and Applications II, (1 November 1997); doi: 10.1117/12.293377
Show Author Affiliations
Franz A. Weber, Lawrence Livermore National Lab. (United States)
Troy W. Barbee, Lawrence Livermore National Lab. (United States)
Peter M. Celliers, Lawrence Livermore National Lab. (United States)
Luiz Barroca Da Silva, Lawrence Livermore National Lab. (United States)
Kazuo A. Tanaka, Osaka Univ. (Japan)
Ryosuke Kodama, Osaka Univ. (Japan)
Kenjiro Takahashi, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 3156:
Soft X-Ray Lasers and Applications II
Jorge J. G. Rocca; Luiz Barroca Da Silva, Editor(s)

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