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Title: Systematic search for spherical crystal X-ray microscopes matching 1–25 keV spectral line sources

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.4972248· OSTI ID:1340260

Spherical-crystal microscopes are used as high-resolution imaging devices for monochromatic x-ray radiography or for imaging the source itself. Crystals and Miller indices (hkl) have to be matched such that the resulting lattice spacing d is close to half the spectral wavelength used for imaging, to fulfill the Bragg equation with a Bragg angle near 90° which reduces astigmatism. Only a few suitable crystal and spectral-line combinations have been identified for applications in the literature, suggesting that x-ray imaging using spherical crystals is constrained to a few chance matches. In this paper, after performing a systematic, automated search over more than 9 × 106 possible combinations for x-ray energies between 1 and 25 keV, for six crystals with arbitrary Miller-index combinations hkl between 0 and 20, we show that a matching, efficient crystal and spectral-line pair can be found for almost every Heα or Kα x-ray source for the elements Ne to Sn. Finally, using the data presented here it should be possible to find a suitable imaging combination using an x-ray source that is specifically selected for a particular purpose, instead of relying on the limited number of existing crystal imaging systems that have been identified to date.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1340260
Alternate ID(s):
OSTI ID: 1364067
Report Number(s):
SAND-2016-12387J; 649751; TRN: US1701072
Journal Information:
Review of Scientific Instruments, Vol. 87, Issue 12; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

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Cited By (3)

Characterization of shaped Bragg crystal assemblies for narrowband x-ray imaging journal October 2018
The Crystal Backlighter Imager: A spherically bent crystal imager for radiography on the National Ignition Facility journal January 2019
Development of broadband x-ray radiography for diagnosing magnetically driven cylindrically compressed matter journal August 2019

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