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SUMMARY:Time-resolved X-ray diffraction on shocked crystals - Thierry d'Al
 meida (University of Cambridge\, Department of Physics)
DTSTART:20091109T160000Z
DTEND:20091109T170000Z
UID:TALK20382@talks.cam.ac.uk
CONTACT:Ian Farnan
DESCRIPTION:The strong potential of time-resolved x ray diffraction as a t
 ool for providing direct\, quantitative insight into atomic processes gove
 rning fast structural changes in the condensed matter\, has been demonstra
 ted during the last decade. \nA good description  of the mechanisms govern
 ing fast structural transformations at the atomic level is of critical imp
 ortance for understanding the macroscopic properties of solids. Realizing 
 this knowledge will have major implications on future materials design\, p
 rocessing and engineering.\nThe penetration power of high energy synchrotr
 on x-rays combined with the highest wave vector resolution represents a po
 werful tool for probing lattice strains inside the bulk of crystalline sol
 ids under shock loading.\nWe have developed a synchrotron-based technique 
  for obtaining diffraction data from laser-shocked solids using a high-res
 olution triple-axis diffractometer coupled to a short-pulsed laser source.
 \nThis method is used to investigate phase transitions\, elastic/plastic d
 eformations and acoustic waves in shock-compressed  KCl\, LiF\, CdS and Si
  single crystals.\n
LOCATION:Harker 2 lecture room\, Department of Earth Sciences\, Downing Si
 te
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