High efficiency XAFS data collection with sub-nanosecond time resolution

D. L. Brewe, S. M. Heald, E. A. Stern, K. M. Beck, Y. Feng

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Synchrotron-based laser pump/x-ray probe experiments on a ns or faster time scale have typically used ultrafast lasers suffering from the limitation of low repetition rates on the order of 1-10 kHz. This severely limits the data collection efficiency, since the x-ray bunches repeat at a much higher rate. This is particularly critical for XAFS experiments, which require very large S/N ratios (∼ 104 or better) to extract useful EXAFS far above the absorption edge. PNC-CAT has developed an apparatus based on a laser repeating at the rate of the APS bunch repetition frequency of 272 kHz, allowing an increase in data collection efficiency by two orders of magnitude. We have used this apparatus to obtain preliminary results for the time-resolved EXAFS from a 200nm thick polycrystalline Ge film which has been heated by the laser.

Original languageEnglish
Title of host publicationSynchrotron Radiation Instrumentation
Subtitle of host publication8th International Conference on Synchrotron Radiation Instrumentation
PublisherAmerican Institute of Physics Inc.
Pages1399-1402
Number of pages4
ISBN (Electronic)0735401799
DOIs
StatePublished - 12 May 2004
Externally publishedYes
Event8th International Conference on Synchrotron Radiation Instrumentation - San Francisco, United States
Duration: 25 Aug 200329 Aug 2003

Publication series

NameAIP Conference Proceedings
Volume705
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference8th International Conference on Synchrotron Radiation Instrumentation
Country/TerritoryUnited States
CitySan Francisco
Period25/08/0329/08/03

Bibliographical note

Publisher Copyright:
© 2004 American Institute of Physics.

Funding

PNC-CAT facilities and research at these facilities is supported by the US DOE Office of Science grant no. DE-FG03-97ER45628. Additional support was provided by Battelle-Pacific Northwest National Laboratory's Laboratory Directed Research Directorate (LDRD). PNC-CAT facilities and research at these facilities is supported by the US DOE Office of Science grant no. DEFG03-97ER45628. Additional support was provided by Battelle-Pacific Northwest National Laboratory's Laboratory Directed Research Directorate (LDRD).

FundersFunder number
Battelle-Pacific Northwest National Laboratory
Battelle-Pacific Northwest National Laboratory's Laboratory Directed Research Directorate
US DOE Office of ScienceDEFG03-97ER45628
Laboratory Directed Research and Development

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