Characterization of a laser-generated LiAg plasma plume

Manolo E. Sherrill; Roberto C. Mancini; James E. Bailey; Alex B. Filuk; Brian F. Clark; Patrick Lake; Joseph Abdallah Jr.

doi:10.1117/12.380803

23 March 2000 Characterization of a laser-generated LiAg plasma plume

Manolo E. Sherrill, Roberto C. Mancini, James E. Bailey, Alex B. Filuk, Brian F. Clark, Patrick Lake, Joseph Abdallah Jr.

Author Affiliations +

Proceedings Volume 3935, Laser Plasma Generation and Diagnostics; (2000) https://doi.org/10.1117/12.380803
Event: Symposium on High-Power Lasers and Applications, 2000, San Jose, CA, United States

Abstract

Time- and spatially-resolved spectroscopy in conjunction with detailed modeling constitutes a powerful technique for the understanding of plasma plume dynamics. To this end, in a series of experiments performed at Sandia National Laboratories, laser-generated LiAg plasma plumes were produced by irradiation of solid targets using a Nd laser. Time- and spatially-resolved (along a direction normal to the target's surface) optical spectra were recorded with a framing spectrograph. In order to limit gradients along a direction perpendicular to the target normal, targets with strips of LiAg coated on top of Pt were used. The PT plume collisionally confines the LiAg, thus reducing the LiAg lateral expansion. This technique allows a better characterization of the LiAg plasma. The spectra displays line transitions in Li and Ag atoms, and evidence of ions in the plume is suggested by the presence of forbidden lines and Stark-broadened line shapes. A spectroscopic model based on collisional-radiative atomic kinetics, detailed line shapes, and radiation transport calculations is used to interpret the data. From this analysis temperature, density and ionization in the plume as a function of time and position along the normal to the target surface can be extracted.

Citation Download Citation

Manolo E. Sherrill, Roberto C. Mancini, James E. Bailey, Alex B. Filuk, Brian F. Clark, Patrick Lake, and Joseph Abdallah Jr. "Characterization of a laser-generated LiAg plasma plume", Proc. SPIE 3935, Laser Plasma Generation and Diagnostics, (23 March 2000); https://doi.org/10.1117/12.380803

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