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

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.

doi:10.1088/1742-6596/717/1/012109

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

Journal Article · Thu May 26 00:00:00 EDT 2016 · Journal of Physics. Conference Series

DOI:https://doi.org/10.1088/1742-6596/717/1/012109· OSTI ID:1258456

McEvoy, A. M. ^[1]; Herrmann, H. W. ^[1]; Kim, Y. ^[1]; Zylstra, A. B. ^[1]; Young, C. S. ^[1]; Fatherley, V. E. ^[1]; Lopez, F. E. ^[1]; Oertel, J. A. ^[1]; Sedillo, T. J. ^[1]; Archuleta, T. N. ^[1]; Aragonez, R. J. ^[1]; Malone, R. M. ^[2]; Horsfield, C. J. ^[3]; Rubery, M. ^[3]; Gales, S. ^[3]; Leatherland, A. ^[3]; Stoeffl, W. ^[4]; Johnson, M. Gatu ^[5]; Shmayda, W. T. ^[6]; Batha, S. H. ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
National Security Technologies, Los Alamos, NM (United States)
Atomic Weapons Establishment, Reading (United Kingdom)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
MIT Plasma Science and Fusion Center, Cambridge, MA (United States)
Lab. for Laser Energetics, Rochester, NY (United States)

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.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1258456

Report Number(s):: LA-UR-16-20096

Journal Information:: Journal of Physics. Conference Series, Vol. 717; ISSN 1742-6588

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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References (7)

Observation of d–t fusion gamma rays (invited) Caldwell, S. E.; Berggren, R. R.; Davis, B. A. Review of Scientific Instruments, Vol. 74, Issue 3 https://doi.org/10.1063/1.1534932	journal	March 2003
Extended performance gas Cherenkov detector for gamma-ray detection in high-energy density experiments Herrmann, H. W.; Kim, Y. H.; Young, C. S. Review of Scientific Instruments, Vol. 85, Issue 11 https://doi.org/10.1063/1.4892553	journal	November 2014
Using gamma-ray emission to measure areal density of inertial confinement fusion capsules Hoffman, N. M.; Wilson, D. C.; Herrmann, H. W. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3478690	journal	October 2010
Measurement of areal density in the ablators of inertial-confinement-fusion capsules via detection of ablator (n, n′γ) gamma-ray emission Hoffman, N. M.; Herrmann, H. W.; Kim, Y. H. Physics of Plasmas, Vol. 20, Issue 4 https://doi.org/10.1063/1.4799799	journal	April 2013
Gamma Reaction History ablator areal density constraints upon correlated diagnostic modeling of National Ignition Facility implosion experiments Cerjan, C.; Sayre, D. B.; Landen, O. L. Physics of Plasmas, Vol. 22, Issue 3 https://doi.org/10.1063/1.4916124	journal	March 2015
In situ calibration of the Gamma Reaction History instrument using reference samples (“pucks”) for areal density measurements Hoffman, N. M.; Herrmann, H. W.; Kim, Y. H. EPJ Web of Conferences, Vol. 59 https://doi.org/10.1051/epjconf/20135913019	journal	January 2013
Monte Carlo validation experiments for the gas Cherenkov detectors at the National Ignition Facility and Omega Rubery, M. S.; Horsfield, C. J.; Herrmann, H. Review of Scientific Instruments, Vol. 84, Issue 7 https://doi.org/10.1063/1.4812572	journal	July 2013

Cited By (3)

Characterization of the Mercury pulsed power x-ray source spectrum using multichannel density aerogel Cherenkov detectors Meaney, K. D.; Kim, Y.; Herrmann, H. W. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038745	journal	October 2018
Progress on next generation gamma-ray Cherenkov detectors for the National Ignition Facility Herrmann, H. W.; Kim, Y. H.; Zylstra, A. B. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5039378	journal	October 2018
Improved calibration of the OMEGA gas Cherenkov detector Zylstra, A. B.; Herrmann, H. W.; Kim, Y. H. Review of Scientific Instruments, Vol. 90, Issue 12 https://doi.org/10.1063/1.5128765	journal	December 2019

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