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Developing a high-flux, high-energy continuum backlighter for extended x-ray absorption fine structure measurements at the National Ignition Facility.
Krygier, A; Coppari, F; Kemp, G E; Thorn, D B; Craxton, R S; Eggert, J H; Garcia, E M; McNaney, J M; Park, H-S; Ping, Y; Remington, B A; Schneider, M B.
Affiliation
  • Krygier A; Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
  • Coppari F; Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
  • Kemp GE; Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
  • Thorn DB; Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
  • Craxton RS; Laboratory for Laser Energetics, University of Rochester, 250 E. River Rd., Rochester, New York 14623-1299, USA.
  • Eggert JH; Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
  • Garcia EM; Laboratory for Laser Energetics, University of Rochester, 250 E. River Rd., Rochester, New York 14623-1299, USA.
  • McNaney JM; Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
  • Park HS; Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
  • Ping Y; Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
  • Remington BA; Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
  • Schneider MB; Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
Rev Sci Instrum ; 89(10): 10F114, 2018 Oct.
Article in En | MEDLINE | ID: mdl-30399955
ABSTRACT
Extended X-ray absorption fine structure (EXAFS) spectroscopy is a powerful tool for in situ characterization of matter in the high energy density regime. An EXAFS platform is currently being developed on the National Ignition Facility. Development of a suitable X-ray backlighter involves minimizing the temporal duration and source size while maximizing spectral smoothness and brightness. One approach involves imploding a spherical shell, which generates a high-flux X-ray flash at stagnation. We present results from a series of experiments comparing the X-ray source properties produced by imploded empty and Ar-filled capsules.

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Rev Sci Instrum Year: 2018 Document type: Article Affiliation country: United States

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Rev Sci Instrum Year: 2018 Document type: Article Affiliation country: United States