skip to main content

SciTech ConnectSciTech Connect

Title: A versatile medium-resolution x-ray emission spectrometer for diamond anvil cell applications

We present design and performance details for a polycapillary-coupled x-ray spectrometer that provides very high collection efficiency at a moderate energy resolution suitable for many studies of nonresonant x-ray emission spectroscopy, especially for samples of heavy elements under high pressures. Using a single Bragg analyzer operating close to backscattering geometry so as to minimize the effect of the weak divergence of the quasicollimated exit beam from the polycapillary optic, this instrument can maintain a typical energy resolution of 5 eV over photon energies from 5 keV to 10 keV. We find dramatically improved count rates as compared to a traditional higher-resolution instrument based on a single spherically bent crystal analyzer.
Authors:
;  [1] ; ; ;  [2] ; ; ;  [3] ;  [4]
  1. Physics Department, University of Washington, Seattle, Washington 98195-1560 (United States)
  2. Condensed Matter and Materials Division, Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
  3. HPCAT, Carnegie Institution of Washington, Argonne, Illinois 60439 (United States)
  4. Pacific Northwest National Laboratory, Richland, Washington 99354 (United States)
Publication Date:
OSTI Identifier:
22220472
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 84; Journal Issue: 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BACKSCATTERING; BEAMS; COUNTING RATES; CRYSTALS; DESIGN; DIAMONDS; EFFICIENCY; EMISSION; EMISSION SPECTROSCOPY; ENERGY RESOLUTION; EV RANGE; KEV RANGE; PHOTONS; SPHERICAL CONFIGURATION; X RADIATION; X-RAY SPECTROMETERS