Analysis of neon soft x-ray spectra from short-pulse laser-produced plasmas

Amber C. Abare; Christopher J. Keane; John K. Crane; Luiz Barroca Da Silva; Richard W. Lee; Michael D. Perry; Roger W. Falcone

doi:10.1117/12.147576

8 July 1993 Analysis of neon soft x-ray spectra from short-pulse laser-produced plasmas

Amber C. Abare, Christopher J. Keane, John K. Crane, Luiz Barroca Da Silva, Richard W. Lee, Michael D. Perry, Roger W. Falcone

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Proceedings Volume 1860, Short-Pulse High-Intensity Lasers and Applications II; (1993) https://doi.org/10.1117/12.147576
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

We report preliminary results from the analysis of streaked soft x-ray neon spectra obtained from the interaction of a picosecond Nd:glass laser with a gas jet target. In these experiments streaked spectra show prompt harmonic emission followed by longer time duration soft x-ray line emission. The majority of the line emission observed was found to originate from Li- and Be-like Ne and the major transitions in the observed spectra have been identified. Li-like emission lines were observed to decay faster in time than Be-like transitions, suggesting that recombination is taking place. Line ratios of n equals 4 - 2 and n equals 3 - 2 transitions supported the view that these lines were optically thin and thick, respectively. The time history of Li-like Ne 2p-4d and 2p-3d lines is in good agreement with a simple adiabatic expansion model coupled to a time dependent collisional-radiative code. Further x-ray spectroscopic analysis is underway which is aimed at diagnosing plasma conditions and assessing the potential of this recombining neon plasma as a quasi-steady-state recombination x-ray laser medium.

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Amber C. Abare, Christopher J. Keane, John K. Crane, Luiz Barroca Da Silva, Richard W. Lee, Michael D. Perry, and Roger W. Falcone "Analysis of neon soft x-ray spectra from short-pulse laser-produced plasmas", Proc. SPIE 1860, Short-Pulse High-Intensity Lasers and Applications II, (8 July 1993); https://doi.org/10.1117/12.147576

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KEYWORDS

X-rays

Neon

Plasmas

Pulsed laser operation

Spectroscopy

X-ray lasers

Picosecond phenomena

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