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

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 × 10 6 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 He α or K α 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 tomore » date.« less
Authors:
ORCiD logo [1] ;  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Report Number(s):
SAND-2016-12387J
Journal ID: ISSN 0034-6748; 649751; TRN: US1701072
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 12; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION
OSTI Identifier:
1340260
Alternate Identifier(s):
OSTI ID: 1364067

Schollmeier, Marius S., and Loisel, Guillaume P.. Systematic search for spherical crystal X-ray microscopes matching 1–25 keV spectral line sources. United States: N. p., Web. doi:10.1063/1.4972248.
Schollmeier, Marius S., & Loisel, Guillaume P.. Systematic search for spherical crystal X-ray microscopes matching 1–25 keV spectral line sources. United States. doi:10.1063/1.4972248.
Schollmeier, Marius S., and Loisel, Guillaume P.. 2016. "Systematic search for spherical crystal X-ray microscopes matching 1–25 keV spectral line sources". United States. doi:10.1063/1.4972248. https://www.osti.gov/servlets/purl/1340260.
@article{osti_1340260,
title = {Systematic search for spherical crystal X-ray microscopes matching 1–25 keV spectral line sources},
author = {Schollmeier, Marius S. and Loisel, Guillaume P.},
abstractNote = {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.},
doi = {10.1063/1.4972248},
journal = {Review of Scientific Instruments},
number = 12,
volume = 87,
place = {United States},
year = {2016},
month = {12}
}

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