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Proceedings Paper

Picosecond-milliangstrom resolution dynamics by ultrafast x-ray diffraction
Author(s): Ting Guo; Christoph G. Rose-Petruck; Ralph Jimenez; Ferenc Raksi; Jeffrey A. Squier; Barry Walker; Kent R. Wilson; Christopher P. P. Barty
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Paper Abstract

Optical pump, x-ray diffraction probe measurements have been used to study the lattice dynamics of single crystals with picosecond-milliangstrom resolution by employing a table- top, laser-driven x-ray source. The x-ray source, consisting of an approximately 30 fs, 75 mJ/pulse, 20 Hz repetition rate, terawatt laser system and a moving Cu wire target assembly, generates approximately 5 X 1010 photons (4π steradians s)-1 of Cu Kα radiation. Lattice spacing changes of as small as 1 X 10-3 Å in a few picoseconds have been detected, utilizing Bragg diffraction from GaAs single crystals. Enhancement of the diffraction intensity associated with degradation of the crystals during and after the laser irradiation has been observed, likely due to a transition from dynamic to kinematic diffraction.

Paper Details

Date Published: 14 October 1997
PDF: 9 pages
Proc. SPIE 3157, Applications of X Rays Generated from Lasers and Other Bright Sources, (14 October 1997); doi: 10.1117/12.283987
Show Author Affiliations
Ting Guo, Univ. of California/San Diego (United States)
Christoph G. Rose-Petruck, Univ. of California/San Diego (United States)
Ralph Jimenez, Univ. of California/San Diego (United States)
Ferenc Raksi, ECR Corp. (United States)
Jeffrey A. Squier, Univ. of California/San Diego (United States)
Barry Walker, Univ. of California/San Diego (United States)
Kent R. Wilson, Univ. of California/San Diego (United States)
Christopher P. P. Barty, Univ. of California/San Diego (United States)


Published in SPIE Proceedings Vol. 3157:
Applications of X Rays Generated from Lasers and Other Bright Sources
George A. Kyrala; Jean-Claude J. Gauthier, Editor(s)

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