Development of a high resolution x-ray spectrometer for the National Ignition Facility (NIF)

Hill, K. W.; Bitter, M.; Delgado-Aparicio, L.; Efthimion, P. C.; Ellis, R.; Gao, L.; Maddox, J.; Pablant, N. A.; Schneider, M. B.; Chen, H.; Ayers, S.; Kauffman, R. L.; MacPhee, A. G.; Beiersdorfer, P.; Bettencourt, R.; Ma, T.; Nora, R. C.; Scott, H. A.; Thorn, D. B.; Kilkenny, J. D.; Nelson, D.; Shoup, III, M.; Maron, Y.

doi:10.1063/1.4962053

Title: Development of a high resolution x-ray spectrometer for the National Ignition Facility (NIF)

Journal Article · Wed Sep 28 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4962053· OSTI ID:1340106

Hill, K. W. ^[1]; Bitter, M. ^[1];

^[1]; Efthimion, P. C. ^[1]; Ellis, R. ^[1];

^[1];

^[1]; Pablant, N. A. ^[1];

^[2]; Chen, H. ^[2]; Ayers, S. ^[2];

^[2];

^[2]; Bettencourt, R. ^[2]; Ma, T. ^[2];

^[2]; Scott, H. A. ^[2]; Thorn, D. B. ^[2]; Kilkenny, J. D. ^[3] more »

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
General Atomics, San Diego, CA (United States)
Univ. of Rochester, Rochester, NY (United States)
Weizmann Institute of Science, Rehovot (Israel)

A high resolution (E/ΔE = 1200-1800) Bragg crystal x-ray spectrometer is being developed to measure plasma parameters in National Ignition Facility experiments. The instrument will be a diagnostic instrument manipulator positioned cassette designed mainly to infer electron density in compressed capsules from Stark broadening of the helium-β (1s²-1s3p) lines of krypton and electron temperature from the relative intensities of dielectronic satellites. Two conically shaped crystals will diffract and focus (1) the Kr Heβ complex and (2) the Heα (1s²-1s2p) and Lyα (1s-2p) complexes onto a streak camera photocathode for time resolved measurement, and a third cylindrical or conical crystal will focus the full Heα to Heβ spectral range onto an image plate to provide a time integrated calibration spectrum. Calculations of source x-ray intensity, spectrometer throughput, and spectral resolution are presented. Furthermore, details of the conical-crystal focusing properties as well as the status of the instrumental design are also presented.

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Research Organization:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Contributing Organization:: Lawrence Livermore National Laboratory, Livermore, California 94551, USA General Atomics, San Diego, California 92121, USA Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA Weizmann Institute of Science, Rehovot 76100, Israel

Grant/Contract Number:: AC02-09CH11466; AC52-07NA27344

OSTI ID:: 1340106

Journal Information:: Review of Scientific Instruments, Vol. 87, Issue 11; Conference: 21st Topical Conference on High-Temperature Plasma Diagnostics, Madison, WI (United States), 5-9 Jun 2016; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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References (9)

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