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

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:
Report Number(s):
LLNL-JRNL-728607
Journal ID: ISSN 0034-6748
Grant/Contract Number:
AC52-07NA27344
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)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
OSTI Identifier:
1390024

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., 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.. 2017. "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}
}

Works referenced in this record:

X-Ray Interactions: Photoabsorption, Scattering, Transmission, and Reflection at E = 50-30,000 eV, Z = 1-92
journal, July 1993
  • Henke, B. L.; Gullikson, E. M.; Davis, J. C.
  • Atomic Data and Nuclear Data Tables, Vol. 54, Issue 2, p. 181-342
  • DOI: 10.1006/adnd.1993.1013