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Proceedings Paper

Soft x-ray pulse-length measurement by pump-probe absorption spectroscopy
Author(s): Harry W.K. Tom; Mark Sher; Umar Mohideen; Obert R. Wood; Gary D. Aumiller; Thomas J. McIlrath; Jeffrey Bokor; Richard R. Freeman; Jack Sugar
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Paper Abstract

We have demonstrated a system for subpicosecond, soft-x-ray continuum, pump-probe absorption spectroscopy. Using multiphoton ionization to abruptly change the x-ray absorption spectra of a gas, we have measured the temporal profile of laser-generated x-ray pulses near 90 eV. Although the x-ray pulses from a laser-generated plasma here were only as short as approximately 20 psec, the technique is extendible to higher energy x rays that will have pulse durations approaching 100 fsec. We also present the absorption spectrum of Kr ions produced under conditions of high intensity non-resonant multiphoton ionization. The spectra are identified with a fit to the Cowan code.

Paper Details

Date Published: 16 May 1994
PDF: 11 pages
Proc. SPIE 2116, Generation, Amplification, and Measurement of Ultrashort Laser Pulses, (16 May 1994); doi: 10.1117/12.175870
Show Author Affiliations
Harry W.K. Tom, Univ. of California/Riverside (United States)
Mark Sher, AT&T Bell Labs. (United States)
Umar Mohideen, AT&T Bell Labs. (United States)
Obert R. Wood, AT&T Bell Labs. (United States)
Gary D. Aumiller, AT&T Bell Labs. (United States)
Thomas J. McIlrath, Univ. of Maryland/College Park (United States)
Jeffrey Bokor, Lawrence Berkeley National Lab. and Univ. of California/Berkeley (United States)
Richard R. Freeman, AT&T Bell Labs. (United States)
Jack Sugar, National Institute of Standards and Technology (United States)

Published in SPIE Proceedings Vol. 2116:
Generation, Amplification, and Measurement of Ultrashort Laser Pulses
Rick P. Trebino; Ian A. Walmsley, Editor(s)

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