Soft-x-ray emission dynamics in picosecond laser-produced plasmas

Plasmas were generated by prepulse-free picosecond laser irradiation of solid targets consisting of five different fluorine salts. Picosecond-time-resolved x-ray spectroscopy of K-shell emission from H-like and He-like fluorine was performed to study the temporal evolution of plasma parameters inclu...

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Published inPhysical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics Vol. 62; no. 2 Pt B; p. 2721
Main Authors Gizzi, LA, Giulietti, A, Willi, O, Riley, D
Format Journal Article
LanguageEnglish
Published United States 01.08.2000
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Summary:Plasmas were generated by prepulse-free picosecond laser irradiation of solid targets consisting of five different fluorine salts. Picosecond-time-resolved x-ray spectroscopy of K-shell emission from H-like and He-like fluorine was performed to study the temporal evolution of plasma parameters including electron density and temperature. Measurements show that the fluorine line emission intensity reaches its maximum in a time comparable with the rise time of the laser pulse. This peak is then followed by a decay whose rate depends upon the atomic number of the alkali component of the target. Our measurements show clear evidence of radiation cooling effects in higher-Z targets.
ISSN:1063-651X
DOI:10.1103/PhysRevE.62.2721