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Crystal response measurement of the x-ray transmission crystals used by the Imaging Spectroscopy Snout at the National Ignition Facility.
Dozieres, M; Krauland, C M; Stoupin, S; Ayers, J; Thompson, N; Castaneda, J; McCarville, T; Tabimina, J A; Huckins, J; Beach, M; Rekow, V; Seely, John; Schneider, M B.
Affiliation
  • Dozieres M; General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA.
  • Krauland CM; General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA.
  • Stoupin S; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
  • Ayers J; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
  • Thompson N; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
  • Castaneda J; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
  • McCarville T; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
  • Tabimina JA; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
  • Huckins J; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
  • Beach M; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
  • Rekow V; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
  • Seely J; Syntek Technologies, Inc., Fairfax, Virginia 22031, USA.
  • Schneider MB; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Rev Sci Instrum ; 93(11): 113520, 2022 Nov 01.
Article in En | MEDLINE | ID: mdl-36461491
ABSTRACT
The Imaging Spectroscopy Snout (ISS) used at the National Ignition Facility is able to simultaneously collect neutron pinhole images, 1D spatially resolved x-ray spectra, and time resolved x-ray pinhole images. To measure the x-ray spectra, the ISS can be equipped with up to four different transmission crystals, each offering different energy ranges from ∼7.5 to ∼12 keV and different resolutions. Characterizing and calibrating such instruments is of paramount importance in order to extract meaningful results from experiments. More specifically, we characterized different ISS transmission-type alpha-Quartz crystals by measuring their responses as a function of photon energy, from which we inferred the angle-integrated reflectivity for each crystal's working reflections. These measurements were made at the Lawrence Livermore National Laboratory calibration station dedicated to the characterization of x-ray spectrometers. The sources used covered a wide x-ray range-from a few to 30 keV; the source diameter was ∼0.6 mm. The experimental results are discussed alongside theoretical calculations using the pyTTE model.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Rev Sci Instrum Year: 2022 Type: Article Affiliation country: United States
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PubMed Links
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Rev Sci Instrum Year: 2022 Type: Article Affiliation country: United States