8 July 1993 Soft x-ray pulse length measurement by pump-probe absorption spectroscopy
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Proceedings Volume 1860, Short-Pulse High-Intensity Lasers and Applications II; (1993); doi: 10.1117/12.147568
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States
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 which will have pulse durations approaching 100 fsec. We also present the absorption spectra of Kr ions produced under conditions of high intensity non-resonant multiphoton ionization. The spectra are identified with a fit to the Cowan code.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mark Sher, Umar Mohideen, Harry W.K. Tom, Obert R. Wood, Gary D. Aumiller, Thomas J. McIlrath, Jeffrey Bokor, Richard R. Freeman, Jack Sugar, "Soft x-ray pulse length measurement by pump-probe absorption spectroscopy", Proc. SPIE 1860, Short-Pulse High-Intensity Lasers and Applications II, (8 July 1993); doi: 10.1117/12.147568; http://dx.doi.org/10.1117/12.147568
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KEYWORDS
X-rays

Krypton

Absorption

Ionization

Plasma

Pulsed laser operation

Ions

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