skip to main content

SciTech ConnectSciTech Connect

Title: Bent crystal spectrometer for both frequency and wavenumber resolved x-ray scattering at a seeded free-electron laser

We present a cylindrically curved GaAs x-ray spectrometer with energy resolution ΔE/E = 1.1 × 10{sup −4} and wave-number resolution of Δk/k = 3 × 10{sup −3}, allowing plasmon scattering at the resolution limits of the Linac Coherent Light Source (LCLS) x-ray free-electron laser. It spans scattering wavenumbers of 3.6 to 5.2/Å in 100 separate bins, with only 0.34% wavenumber blurring. The dispersion of 0.418 eV/13.5 μm agrees with predictions within 1.3%. The reflection homogeneity over the entire wavenumber range was measured and used to normalize the amplitude of scattering spectra. The proposed spectrometer is superior to a mosaic highly annealed pyrolytic graphite spectrometer when the energy resolution needs to be comparable to the LCLS seeded bandwidth of 1 eV and a significant range of wavenumbers must be covered in one exposure.
Authors:
 [1] ;  [2] ; ; ; ; ; ; ; ;  [3] ;  [1] ;  [4] ; ;  [1]
  1. Institute of Optics and Quantum Electronics, Friedrich-Schiller University Jena, Max-Wien-Platz 1, 07743 Jena (Germany)
  2. (SLAC), 2575 Sand Hill Road, Menlo Park, California 94025 (United States)
  3. Stanford Linear Accelerator Center (SLAC), 2575 Sand Hill Road, Menlo Park, California 94025 (United States)
  4. (Germany)
Publication Date:
OSTI Identifier:
22314443
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 9; Other Information: (c) 2014 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; ANNEALING; CRYSTALS; ENERGY RESOLUTION; EV RANGE; FREE ELECTRON LASERS; GALLIUM ARSENIDES; GRAPHITE; LIGHT SOURCES; LINEAR ACCELERATORS; PYROLYTIC CARBON; REFLECTION; X RADIATION; X-RAY DIFFRACTION; X-RAY SPECTROMETERS