Characterization of KAP and RbAP Crystals Using Soft X-Rays for NIF Opacity Spectrometer

ORAL

Abstract

Accurate characterization of the Opacity Spectrometer (OpSpec) crystals is paramount in ensuring high-quality data from soft X-ray opacity experiments performed at the National Ignition Facility (NIF). Such data addresses the discrepancy between opacity theory and experiments. The Henke X-ray diffractometer at the Nevada National Security Site is being used for high-fidelity crystal characterization. The procedure provides detailed crystal spectra, accommodating a range of different tests, for advances in crystal and spectrometer design. Potassium acid phthalate (KAP) and rubidium acid phthalate (RbAP) crystals are typically characterized at operating voltage and current of 2.5 kV, 15 mA or 15 kV, 20 mA. Image plates are used to record the spectra and are used for identification of crystal defects both before and after NIF shots. Further characterization improvements are underway regarding crystal shape, anode choice, and analysis procedure.

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Authors

  • AM Durand

    Nevada National Security Site, Lawrence Livermore National Laboratory, Nevada Natl. Security Site

  • R Lara

    Nevada National Security Site, Nevada Natl. Security Site

  • EC Dutra

    Nevada National Security Site, Nevada Natl Security Site, Nevada Natl. Security Site

  • MS Wallace

    Nevada National Security Site, Nevada Natl Security Site, Nevada Natl. Security Site

  • RA Knight

    Nevada National Security Site, Nevada Natl. Security Site

  • JM Heinmiller

    Nevada National Security Site, Nevada Natl Security Site, Nevada Natl. Security Site

  • RF Heeter

    Lawrence Livermore National Laboratory, LLNL, Lawrence Livermore Natl Laboratory, Lawrence Livermore Natl Lab, Lawrence Livermore Natl. Lab

  • J Emig

    LLNL, Lawrence Livermore National Laboratory, Lawrence Livermore Natl Laboratory, Lawrence Livermore Natl. Lab

  • T Archuleta

    Los Alamos Natl Laboratory, Los Alamos Natl. Lab

  • TS Perry

    Los Alamos Natl Laboratory, LANL, Los Alamos Natl Lab, Los Alamos Natl. Lab

  • Kirk Flippo

    Los Alamos National Laboratory, Los Alamos Natl Lab, Los Alamos Natl Laboratory

  • TJ Urbatsch

    Los Alamos National Laboratory, Los Alamos Natl Lab, Los Alamos Natl Laboratory, LANL, Los Alamos Natl. Lab