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Proceedings Paper

Ion yields from strong optical field ionization experiments using 100-femtosecond laser pulses
Author(s): David N. Fittinghoff; Paul Robert Bolton; Britton Chang; Linn D. Van Woerkom; William E. White
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Paper Abstract

The ultra-fast ionization of argon, krypton and xenon by intense ultra-short laser pulses is studied. Intensities in the range 1014 to 1016 W/cm2 at a wavelength of 616 nm are provided by a colliding pulse mode-locked dye laser system. To date, ion yields have been monitored using a 1 meter time.of flight spectrometer. Intensity dependent photoelectron signals are deduced from ion data. In an ultra-fast strong field environment, ionization times can be less than an optical period, affording a better distinction between a field ionization picture and a multiphoton ionization picture. For most cases that we study, Keldysh parameters are below 1, indicating that we are in a field ionization regime. As a laser system under development progresses towards the design goal of 1 joule per 100 femtosecond pulse, we will extend these investigations to peak intensities of order 1018 to 1019 Watts/cm2.

Paper Details

Date Published: 1 June 1991
PDF: 8 pages
Proc. SPIE 1413, Short-Pulse High-Intensity Lasers and Applications, (1 June 1991); doi: 10.1117/12.46139
Show Author Affiliations
David N. Fittinghoff, Lawrence Livermore National Lab. (United States)
Paul Robert Bolton, Lawrence Livermore National Lab. (United States)
Britton Chang, Lawrence Livermore National Lab. (United States)
Linn D. Van Woerkom, Lawrence Livermore National Lab. (United States)
William E. White, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 1413:
Short-Pulse High-Intensity Lasers and Applications
Hector A. Baldis, Editor(s)

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