Emission Of Lithiumlike Transitions From Dense Plasmas Created By Picosecond KrF Laser Pulses

J F Seely; U Feldman; C H Nam; W Tighe; S Suckewer; L A Woltz

doi:10.1117/12.965141

11 July 1988 Emission Of Lithiumlike Transitions From Dense Plasmas Created By Picosecond KrF Laser Pulses

J F Seely, U Feldman, C H Nam, W Tighe, S Suckewer, L A Woltz

Proceedings Volume 0913, High Intensity Laser-Matter Interactions; (1988) https://doi.org/10.1117/12.965141
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

Abstract

Broad spectral lines have been observed in the high-resolution extreme ultraviolet (XUV) spectra from plasmas created by irradiating solid targets using picosecond laser pulses. Transitions of the type n=2-3 and n=2-4 in Li-like ions of the elements N, 0, F, and Al have linewidths up to 2 Å. Using quasistatic ion Stark broadening, the electron densities of the plasma emission regions have been derived from the linewidths. The derived electron densities are found to be inversely proportional to the lifetimes of the upper levels of the transitions. The electron densities range from 2 x 10²² cm^-3 for levels with lifetimes less than 4 picoseconds to 10²¹ cm^-3 for levels with lifetimes greater than 30 picoseconds. In effect, the XUV emission is time-resolved in the expanding plasma. The observation of emission from solid-density regions (greater than 4 x 10²³ cm^-3) will require transitions from levels in highly charged ions with lifetimes less than a picosecond.

Citation Download Citation

J F Seely, U Feldman, C H Nam, W Tighe, S Suckewer, and L A Woltz "Emission Of Lithiumlike Transitions From Dense Plasmas Created By Picosecond KrF Laser Pulses", Proc. SPIE 0913, High Intensity Laser-Matter Interactions, (11 July 1988); https://doi.org/10.1117/12.965141

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