Temporal and spectral dependence of samariuom x-ray emission in subpicosecond and nanosecond laser-produced plasmas

Claude J. Chenais-Popovics; Patrick Audebert; M. Fajardo; Ronnie L. Shepherd; Olivier Peyrusse; Jean-Claude J. Gauthier

doi:10.1117/12.448473

14 November 2001 Temporal and spectral dependence of samariuom x-ray emission in subpicosecond and nanosecond laser-produced plasmas

Claude J. Chenais-Popovics, Patrick Audebert, M. Fajardo, Ronnie L. Shepherd, Olivier Peyrusse, Jean-Claude J. Gauthier

Author Affiliations +

Proceedings Volume 4504, Applications of X Rays Generated from Lasers and Other Bright Sources II; (2001) https://doi.org/10.1117/12.448473
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

Ultra-short x-ray sources are generated by focusing sub- picosecond lasers on massive targets. The emission duration of a samarium x-ray source produced with a 100 TW sub- picosecond laser was measured using an ultra-fast X-ray streak camera. The spectral range was limited around 7.5-8.5 angstrom, the range in which samarium can be used as a backlighter for K(alpha) aluminum absorption experiments. The spectral time-evolution and the duration of samarium emission were measured. Preliminary calculations performed with non-local-thermodynamic equilibrium atomic physics show the plasma cooling which occurs with a characteristic time longer than predicted by radiative hydrocode simulations.

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Claude J. Chenais-Popovics, Patrick Audebert, M. Fajardo, Ronnie L. Shepherd, Olivier Peyrusse, and Jean-Claude J. Gauthier "Temporal and spectral dependence of samariuom x-ray emission in subpicosecond and nanosecond laser-produced plasmas", Proc. SPIE 4504, Applications of X Rays Generated from Lasers and Other Bright Sources II, (14 November 2001); https://doi.org/10.1117/12.448473

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