Interferometric studies of laser-created plasmas using compact soft x-ray lasers

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

doi:10.1117/12.507232

19 December 2003 Interferometric studies of laser-created plasmas using compact soft x-ray lasers

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

Author Affiliations +

Proceedings Volume 5197, Soft X-Ray Lasers and Applications V; (2003) https://doi.org/10.1117/12.507232
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

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.

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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, and James R. Hunter "Interferometric studies of laser-created plasmas using compact soft x-ray lasers", Proc. SPIE 5197, Soft X-Ray Lasers and Applications V, (19 December 2003); https://doi.org/10.1117/12.507232

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