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Proceedings Paper

Plasma diagnostics using a tabletop soft x-ray laser: demonstration of shadowgraphy and interferometry using a Lloyd's mirror
Author(s): Kelly Kanizay; Mario C. Marconi; Cesar H. Moreno; Jorge J. G. Rocca; Vyacheslav N. Shlyaptsev; Yurii A. Uspenskii; Alexander V. Vinogradov; Yurii P. Pershin
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Paper Abstract

We report the first demonstration of plasma imaging and interferometry using a tabletop soft x-ray laser. A very compact capillary discharge Ne-like Ar laser operating at 46.9 nm was used as a backlighter to study the evolution of the plasma of a micro-capillary discharge. The resulting series of shadowgrams show the plasma created by ablation of the walls of the evacuated micro-capillary rapidly evolves from a non-uniform initial state into a symmetric column with minimum density on axis. In a second experiment we took advantage of the good spatial coherence of the capillary discharge laser to perform interferometry measurements in the plasma of a pinch discharge. In this experiment the laser was used in combination with a wavefront division interferometer based on Lloyd's mirror to map the electron density distribution in the cathode region of the discharge.

Paper Details

Date Published: 21 October 1999
PDF: 12 pages
Proc. SPIE 3776, Soft X-Ray Lasers and Applications III, (21 October 1999); doi: 10.1117/12.366671
Show Author Affiliations
Kelly Kanizay, Colorado State Univ. (United States)
Mario C. Marconi, Colorado State Univ. (Argentina)
Cesar H. Moreno, Colorado State Univ. (United States)
Jorge J. G. Rocca, Colorado State Univ. (United States)
Vyacheslav N. Shlyaptsev, Univ. of California Davis and Lawrence Livermore National Lab. (United States)
Yurii A. Uspenskii, P.N. Lebedev Physical Institute (Russia)
Alexander V. Vinogradov, P.N. Lebedev Physical Institute (Russia)
Yurii P. Pershin, Kharkov State Polytechnic Univ. (Ukraine)

Published in SPIE Proceedings Vol. 3776:
Soft X-Ray Lasers and Applications III
Jorge J. G. Rocca; Luiz Barroca Da Silva, Editor(s)

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