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Proceedings Paper

Advances in dense-plasma interferometry with a tabletop capillary discharge soft x-ray laser
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Paper Abstract

We report an extension of previous tabletop soft x-ray laser interferometry work to plasma densities approaching the critical density. The evolution of line-focus and spot-focus plasmas created with Nd-YAG laser intensities of 0.1 and 7.0 TW/cm2 respectively were studied utilizing a 46.9-nm capillary discharge laser with a diffraction grating interferometer. In the latter case, the electron density was mapped to values up to 0.9x1021 cm-3 (90% of the critical density for the lambda equals 1.06 micrometers pump laser). The interferograms show the development of concave electron density profiles with a minimum on axis and pronounced side lobes. Hydrodynamic model simulations show that the concave profile is the result of the hydrodynamic and radiation effects that enlarge the ablated target area. The measurements exemplify how soft x-ray lasers can be used to probe high density plasmas for the validation of hydrodynamic codes.

Paper Details

Date Published: 12 December 2001
PDF: 9 pages
Proc. SPIE 4505, Soft X-Ray Lasers and Applications IV, (12 December 2001); doi: 10.1117/12.450594
Show Author Affiliations
Ela Jankowska, Colorado State Univ. (United States)
Eric Hammarsten, Colorado State Univ. (United States)
Jorge Filevich Chamatropulos, Colorado State Univ. (Argentina)
Mario C. Marconi, Univ. de Buenos Aires (Argentina)
Jorge J. G. Rocca, Colorado State Univ. (United States)
Stephen J. Moon, Lawrence Livermore National Lab. (United States)
Vyacheslav N. Shlyaptsev, Lawrence Livermore National Lab. and Univ. of California/Davis (United States)

Published in SPIE Proceedings Vol. 4505:
Soft X-Ray Lasers and Applications IV
Ernst E. Fill; Jorge J. G. Rocca, Editor(s)

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