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Title: X-ray source development for EXAFS measurements on the National Ignition Facility

Abstract

We present that extended X-ray absorption Fine Structure (EXAFS) measurements require a bright, spectrally smooth, and broad-band x-ray source. In a laser facility, such an x-ray source can be generated by a laser-driven capsule implosion. In order to optimize the x-ray emission, different capsule types and laser irradiations have been tested at the National Ignition Facility (NIF). A crystal spectrometer is used to disperse the x-rays and high efficiency image plate detectors are used to measure the absorption spectra in transmission geometry. Finally, EXAFS measurements at the K-edge of iron at ambient conditions have been obtained for the first time on the NIF laser, and the requirements for optimization have been established.

Authors:
 [1];  [1];  [1]; ORCiD logo [2];  [2];  [1];  [1]; ORCiD logo [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1390024
Report Number(s):
LLNL-JRNL-728607
Journal ID: ISSN 0034-6748
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 88; Journal Issue: 8; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Coppari, F., Thorn, D. B., Kemp, G. E., Craxton, R. S., Garcia, E. M., Ping, Y., Eggert, J. H., and Schneider, M. B. X-ray source development for EXAFS measurements on the National Ignition Facility. United States: N. p., 2017. Web. doi:10.1063/1.4999649.
Coppari, F., Thorn, D. B., Kemp, G. E., Craxton, R. S., Garcia, E. M., Ping, Y., Eggert, J. H., & Schneider, M. B. X-ray source development for EXAFS measurements on the National Ignition Facility. United States. doi:10.1063/1.4999649.
Coppari, F., Thorn, D. B., Kemp, G. E., Craxton, R. S., Garcia, E. M., Ping, Y., Eggert, J. H., and Schneider, M. B. Mon . "X-ray source development for EXAFS measurements on the National Ignition Facility". United States. doi:10.1063/1.4999649. https://www.osti.gov/servlets/purl/1390024.
@article{osti_1390024,
title = {X-ray source development for EXAFS measurements on the National Ignition Facility},
author = {Coppari, F. and Thorn, D. B. and Kemp, G. E. and Craxton, R. S. and Garcia, E. M. and Ping, Y. and Eggert, J. H. and Schneider, M. B.},
abstractNote = {We present that extended X-ray absorption Fine Structure (EXAFS) measurements require a bright, spectrally smooth, and broad-band x-ray source. In a laser facility, such an x-ray source can be generated by a laser-driven capsule implosion. In order to optimize the x-ray emission, different capsule types and laser irradiations have been tested at the National Ignition Facility (NIF). A crystal spectrometer is used to disperse the x-rays and high efficiency image plate detectors are used to measure the absorption spectra in transmission geometry. Finally, EXAFS measurements at the K-edge of iron at ambient conditions have been obtained for the first time on the NIF laser, and the requirements for optimization have been established.},
doi = {10.1063/1.4999649},
journal = {Review of Scientific Instruments},
number = 8,
volume = 88,
place = {United States},
year = {2017},
month = {8}
}

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    Works referencing / citing this record:

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