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Title: A compact filtered x-ray diode array spectrometer for the National Ignition Facility: SENTINEL

Abstract

Sentinel is a 16-channel, filtered x-ray diode array spectrometer that has been developed to measure ∼1 keV–20 keV x-ray emission generated by the National Ignition Facility (NIF) laser. Unlike the large, fixed-port versions of this diagnostic that currently exist on the NIF (known as Dante), Sentinel is a Diagnostic Instrument Manipulator compatible such that it can be fielded along the polar or equatorial lines-of-sight—an essential new capability for characterizing the often anisotropic x-ray emission from laser-driven sources. We present the diagnostic design along with preliminary diode calibrations and performance results. The novel, small-form-factor x-ray diode design allows for ≳5×–25× increased channel areal density over that of Dante, simultaneously enabling improved diagnostic robustness and fidelity of spectral reconstructions. While the Sentinel diagnostic is anticipated to improve line-of-sight spectral characterization of x-ray sources for a wide variety of programs on the NIF, the compact and portable design is also attractive to small- and mid-scale facilities with limited diagnostic real estate.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2];  [1];  [1];  [1];  [2];  [1];  [1];  [3];  [1]
+ Show Author Affiliations
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Nevada National Security Site (NSS), Las Vegas, NV (United States)
  3. Fifth Gait Technologies, Inc., Huntsville, AL (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1736345
Alternate Identifier(s):
OSTI ID: 1970564
Report Number(s):
LLNL-JRNL-813698
Journal ID: ISSN 0034-6748; 1021792; TRN: US2205491
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 91; Journal Issue: 12; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; plasma physics

Citation Formats

Kemp, G. E., May, M. J., MacNeil, L. P., Allen, F. V., Brown, C. G., Christensen, K. S., Dutra, E. C., Esquivel, C. A., Martinez, A. N., Fisher, J. H., and Blue, B. E.. A compact filtered x-ray diode array spectrometer for the National Ignition Facility: SENTINEL. United States: N. p., 2020. Web. doi:10.1063/5.0025841.
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Kemp, G. E., May, M. J., MacNeil, L. P., Allen, F. V., Brown, C. G., Christensen, K. S., Dutra, E. C., Esquivel, C. A., Martinez, A. N., Fisher, J. H., & Blue, B. E.. A compact filtered x-ray diode array spectrometer for the National Ignition Facility: SENTINEL. United States. https://doi.org/10.1063/5.0025841
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Kemp, G. E., May, M. J., MacNeil, L. P., Allen, F. V., Brown, C. G., Christensen, K. S., Dutra, E. C., Esquivel, C. A., Martinez, A. N., Fisher, J. H., and Blue, B. E.. Wed . "A compact filtered x-ray diode array spectrometer for the National Ignition Facility: SENTINEL". United States. https://doi.org/10.1063/5.0025841. https://www.osti.gov/servlets/purl/1736345.
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@article{osti_1736345,
title = {A compact filtered x-ray diode array spectrometer for the National Ignition Facility: SENTINEL},
author = {Kemp, G. E. and May, M. J. and MacNeil, L. P. and Allen, F. V. and Brown, C. G. and Christensen, K. S. and Dutra, E. C. and Esquivel, C. A. and Martinez, A. N. and Fisher, J. H. and Blue, B. E.},
abstractNote = {Sentinel is a 16-channel, filtered x-ray diode array spectrometer that has been developed to measure ∼1 keV–20 keV x-ray emission generated by the National Ignition Facility (NIF) laser. Unlike the large, fixed-port versions of this diagnostic that currently exist on the NIF (known as Dante), Sentinel is a Diagnostic Instrument Manipulator compatible such that it can be fielded along the polar or equatorial lines-of-sight—an essential new capability for characterizing the often anisotropic x-ray emission from laser-driven sources. We present the diagnostic design along with preliminary diode calibrations and performance results. The novel, small-form-factor x-ray diode design allows for ≳5×–25× increased channel areal density over that of Dante, simultaneously enabling improved diagnostic robustness and fidelity of spectral reconstructions. While the Sentinel diagnostic is anticipated to improve line-of-sight spectral characterization of x-ray sources for a wide variety of programs on the NIF, the compact and portable design is also attractive to small- and mid-scale facilities with limited diagnostic real estate.},
doi = {10.1063/5.0025841},
journal = {Review of Scientific Instruments},
number = 12,
volume = 91,
place = {United States},
year = {2020},
month = {12}
}
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https://doi.org/10.1063/5.0025841
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