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Title: Gamma ray measurements at OMEGA with the newest gas Cherenkov Detector “GCD-3”

Abstract

Initial results from the newest Gas Cherenkov Detector (GCD-3) are reported demonstrating improved performance over previous GCD iterations. Increased shielding and lengthening of the Cherenkov photon optical path have resulted in a diminished precursor signal with increased temporal separation between the precursor and the primary DT Cherenkov signal. Design changes resulted in a measured GCD-3 sensitivity comparable to GCD-1 at identical 100 psia CO2 operation. All metal gasket seals and pressure vessel certification to 400 psia operation allow for a GCD-3 lower Cherenkov threshold of 1.8 MeV using the fluorinated gas C2F6 as compared to the 6.3 MeV lower limit of GCD-1 and GCD-2. Calibration data will be used to benchmark GEANT4 and ACCEPT detector models. Lastly, the GCD-3 acts as a prototype for the Super GCD being fielded at the National Ignition Facility (NIF) as part of the National Diagnostics Plan and will be installed at NIF in early 2016.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [3];  [3];  [3];  [4];  [5];  [6];  [1]
+ Show Author Affiliations
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. National Security Technologies, Los Alamos, NM (United States)
  3. Atomic Weapons Establishment, Reading (United Kingdom)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  5. MIT Plasma Science and Fusion Center, Cambridge, MA (United States)
  6. Lab. for Laser Energetics, Rochester, NY (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1258456
Report Number(s):
LA-UR-16-20096
Journal ID: ISSN 1742-6588
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series
Additional Journal Information:
Journal Volume: 717; Journal ID: ISSN 1742-6588
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

McEvoy, A. M., Herrmann, H. W., Kim, Y., Zylstra, A. B., Young, C. S., Fatherley, V. E., Lopez, F. E., Oertel, J. A., Sedillo, T. J., Archuleta, T. N., Aragonez, R. J., Malone, R. M., Horsfield, C. J., Rubery, M., Gales, S., Leatherland, A., Stoeffl, W., Johnson, M. Gatu, Shmayda, W. T., and Batha, S. H.. Gamma ray measurements at OMEGA with the newest gas Cherenkov Detector “GCD-3”. United States: N. p., 2016. Web. doi:10.1088/1742-6596/717/1/012109.
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McEvoy, A. M., Herrmann, H. W., Kim, Y., Zylstra, A. B., Young, C. S., Fatherley, V. E., Lopez, F. E., Oertel, J. A., Sedillo, T. J., Archuleta, T. N., Aragonez, R. J., Malone, R. M., Horsfield, C. J., Rubery, M., Gales, S., Leatherland, A., Stoeffl, W., Johnson, M. Gatu, Shmayda, W. T., & Batha, S. H.. Gamma ray measurements at OMEGA with the newest gas Cherenkov Detector “GCD-3”. United States. https://doi.org/10.1088/1742-6596/717/1/012109
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McEvoy, A. M., Herrmann, H. W., Kim, Y., Zylstra, A. B., Young, C. S., Fatherley, V. E., Lopez, F. E., Oertel, J. A., Sedillo, T. J., Archuleta, T. N., Aragonez, R. J., Malone, R. M., Horsfield, C. J., Rubery, M., Gales, S., Leatherland, A., Stoeffl, W., Johnson, M. Gatu, Shmayda, W. T., and Batha, S. H.. Thu . "Gamma ray measurements at OMEGA with the newest gas Cherenkov Detector “GCD-3”". United States. https://doi.org/10.1088/1742-6596/717/1/012109. https://www.osti.gov/servlets/purl/1258456.
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@article{osti_1258456,
title = {Gamma ray measurements at OMEGA with the newest gas Cherenkov Detector “GCD-3”},
author = {McEvoy, A. M. and Herrmann, H. W. and Kim, Y. and Zylstra, A. B. and Young, C. S. and Fatherley, V. E. and Lopez, F. E. and Oertel, J. A. and Sedillo, T. J. and Archuleta, T. N. and Aragonez, R. J. and Malone, R. M. and Horsfield, C. J. and Rubery, M. and Gales, S. and Leatherland, A. and Stoeffl, W. and Johnson, M. Gatu and Shmayda, W. T. and Batha, S. H.},
abstractNote = {Initial results from the newest Gas Cherenkov Detector (GCD-3) are reported demonstrating improved performance over previous GCD iterations. Increased shielding and lengthening of the Cherenkov photon optical path have resulted in a diminished precursor signal with increased temporal separation between the precursor and the primary DT Cherenkov signal. Design changes resulted in a measured GCD-3 sensitivity comparable to GCD-1 at identical 100 psia CO2 operation. All metal gasket seals and pressure vessel certification to 400 psia operation allow for a GCD-3 lower Cherenkov threshold of 1.8 MeV using the fluorinated gas C2F6 as compared to the 6.3 MeV lower limit of GCD-1 and GCD-2. Calibration data will be used to benchmark GEANT4 and ACCEPT detector models. Lastly, the GCD-3 acts as a prototype for the Super GCD being fielded at the National Ignition Facility (NIF) as part of the National Diagnostics Plan and will be installed at NIF in early 2016.},
doi = {10.1088/1742-6596/717/1/012109},
journal = {Journal of Physics. Conference Series},
number = ,
volume = 717,
place = {United States},
year = {2016},
month = {5}
}
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https://doi.org/10.1088/1742-6596/717/1/012109
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Works referenced in this record:

Observation of d–t fusion gamma rays (invited)
journal, March 2003

  • Caldwell, S. E.; Berggren, R. R.; Davis, B. A.
  • Review of Scientific Instruments, Vol. 74, Issue 3
  • DOI: 10.1063/1.1534932

Extended performance gas Cherenkov detector for gamma-ray detection in high-energy density experiments
journal, November 2014

  • Herrmann, H. W.; Kim, Y. H.; Young, C. S.
  • Review of Scientific Instruments, Vol. 85, Issue 11
  • DOI: 10.1063/1.4892553

Using gamma-ray emission to measure areal density of inertial confinement fusion capsules
journal, October 2010

  • Hoffman, N. M.; Wilson, D. C.; Herrmann, H. W.
  • Review of Scientific Instruments, Vol. 81, Issue 10
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Measurement of areal density in the ablators of inertial-confinement-fusion capsules via detection of ablator (n, n′γ) gamma-ray emission
journal, April 2013

  • Hoffman, N. M.; Herrmann, H. W.; Kim, Y. H.
  • Physics of Plasmas, Vol. 20, Issue 4
  • DOI: 10.1063/1.4799799

In situ calibration of the Gamma Reaction History instrument using reference samples (“pucks”) for areal density measurements
journal, January 2013

Monte Carlo validation experiments for the gas Cherenkov detectors at the National Ignition Facility and Omega
journal, July 2013

  • Rubery, M. S.; Horsfield, C. J.; Herrmann, H.
  • Review of Scientific Instruments, Vol. 84, Issue 7
  • DOI: 10.1063/1.4812572
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    Works referencing / citing this record:

    Characterization of the Mercury pulsed power x-ray source spectrum using multichannel density aerogel Cherenkov detectors
    journal, October 2018

    • Meaney, K. D.; Kim, Y.; Herrmann, H. W.
    • Review of Scientific Instruments, Vol. 89, Issue 10
    • DOI: 10.1063/1.5038745

    Progress on next generation gamma-ray Cherenkov detectors for the National Ignition Facility
    journal, October 2018

    • Herrmann, H. W.; Kim, Y. H.; Zylstra, A. B.
    • Review of Scientific Instruments, Vol. 89, Issue 10
    • DOI: 10.1063/1.5039378

    Improved calibration of the OMEGA gas Cherenkov detector
    journal, December 2019

    • Zylstra, A. B.; Herrmann, H. W.; Kim, Y. H.
    • Review of Scientific Instruments, Vol. 90, Issue 12
    • DOI: 10.1063/1.5128765
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