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Publication Detail
A technique for high-frequency laser-pump X-ray probe experiments at the APS
  • Publication Type:
    Conference
  • Authors:
    Dufresne EM, Adams B, Chollet M, Harder R, Li YL, Wen HD, Leake SJ, Beitra L, Huang XJ, Robinson IK
  • Publisher:
    ELSEVIER SCIENCE BV
  • Publication date:
    01/09/2011
  • Pagination:
    191, 193
  • Published proceedings:
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
  • Volume:
    649
  • Issue:
    1
  • Name of conference:
    16th Pan-American Conference on Synchrotron Radiation Instrumentation (SRI2010)
  • Conference place:
    Chicago, IL
  • Conference start date:
    21/09/2010
  • Conference finish date:
    24/09/2010
  • Print ISSN:
    0168-9002
  • Language:
    EN
  • Keywords:
    Coherent diffraction imaging, Time-resolved diffraction, Ultrafast techniques, NANOWIRES
  • Addresses:
    Dufresne, EM
    Argonne Natl Lab
    Adv Photon Source
    Argonne
    IL
    60439
    USA

    Diamond Light Source
    Didcot
    OX11 0DE
    Oxon
    England
Abstract
When a short-pulse laser beam is absorbed in a crystal, the heat or large electric field can induce time-dependent strain waves which propagate in the material at the speed of sound. At a synchrotron, the repetition rate of the X-ray source (MHz) and the laser (kHz) is often mismatched by several orders of magnitude leading to a very inefficient use of the X-ray probe beam. In this paper, we will show how one can synchronize a femtosecond 88 MHz Ti:Sapphire laser to the APS running at the same repetition rate in 324-bunch mode. This efficient use of the X-rays enabled us to measure coherent diffraction patterns from nanoparticle of ZnO as a function of the Bragg angle and time delay between the laser-pump and X-ray probe beams. Significant time-dependent strain can be created with a few nanoJoule per pulse when the nanoparticle is centered in a tight laser focus of a few microns. (C) 2011 Elsevier B.V. All rights reserved.
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