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Proceedings Paper

Interferometric studies of laser-created plasmas using compact soft x-ray lasers
Author(s): Jorge Filevich; Jorge J. Rocca; Eric C. Hammarsten; Elzbieta B. Jankowska; Mario C. Marconi; Raymond F. Smith; Roisin Keenan; James Dunn; Stephen Moon; Vyacheslav V. Shlyaptsev; Joseph Nilsen; James R. Hunter
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Paper Abstract

We summarize results of several successful dense plasma diagnostics experiments realized combining two different kinds of table-top soft x-ray lasers with an amplitude division interferometer based on diffraction grating beam splitters. In the first set of experiments this robust high throughput diffraction grating interferometer (DGI) was used with a 46.9 nm portable capillary discharge laser to study the dynamics of line focus and point focus laser-created plasmas. The measured electron density profiles, which differ significantly from those expected from a classical expansion, unveil important twodimensional effects of the dynamics of these plasmas. A second DGI customized to operate in combination with a 14.7 nm Ni-like Pd transient gain laser was used to perform interferometry of line focus laser-created plasmas with picosecond time resolution. These measurements provide valuable new benchmarks for complex hydrodynamic codes and help bring new understanding of the dynamics of dense plasmas. The instrumentation and methodology we describe is scalable to significantly shorter wavelengths, and constitutes a promising scheme for extending interferometry to the study of very dense plasmas such as those investigated for inertial confinment fusion.

Paper Details

Date Published: 19 December 2003
PDF: 12 pages
Proc. SPIE 5197, Soft X-Ray Lasers and Applications V, (19 December 2003); doi: 10.1117/12.507232
Show Author Affiliations
Jorge Filevich, Colorado State Univ. (United States)
Jorge J. Rocca, Colorado State Univ. (United States)
Eric C. Hammarsten, Colorado State Univ. (United States)
Elzbieta B. Jankowska, Colorado State Univ. (United States)
Mario C. Marconi, Colorado State Univ. (United States)
Univ. de Buenos Aires (Argentina)
Raymond F. Smith, Lawrence Livermore National Lab. (United States)
Roisin Keenan, Lawrence Livermore National Lab. (United States)
James Dunn, Lawrence Livermore National Lab. (United States)
Stephen Moon, Lawrence Livermore National Lab. (United States)
Vyacheslav V. Shlyaptsev, Univ. of California/Davis (United States)
Joseph Nilsen, Lawrence Livermore National Lab. (United States)
James R. Hunter, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 5197:
Soft X-Ray Lasers and Applications V
Ernst E. Fill; Szymon Suckewer, Editor(s)

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