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

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.4999649· OSTI ID:1390024

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.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1390024
Report Number(s):
LLNL-JRNL-728607
Journal Information:
Review of Scientific Instruments, Vol. 88, Issue 8; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

References (25)

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Cited By (4)

EXAFS of titanium LIII edge using a compact laboratory system based on a laser-plasma soft X-ray source journal December 2019
A new toroidal x-ray crystal spectrometer for the diagnosis of high energy density plasmas at the National Ignition Facility journal October 2018
X-ray spectrometer throughput model for (selected) flat Bragg crystal spectrometers on laser plasma facilities journal October 2018
Probing disorder in high-pressure cubic tin (IV) oxide: a combined X-ray diffraction and absorption study journal May 2019

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