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Title: Characterization of the Mercury pulsed power x-ray source spectrum using multichannel density aerogel Cherenkov detectors

Abstract

The Aerogel Cherenkov Detector for Cygnus (ACD/C) is a time-dependent, x-ray spectral detector that uses SiO 2 aerogels spanning an index of refraction (n = 1.02–1.07) corresponding to a 1.1–2.3 MeV x-ray energy threshold. The ACD/C was developed for pulsed power x-ray sources like Cygnus located at the Nevada National Site and Mercury located at the Naval Research Laboratory (NRL). Aerogels sit between the measurement capabilities of gas (>2 MeV) and solids such as fused silica (>0.3 MeV). The detector uses an aluminum converter to Compton scatter incoming x-rays and create relativistic electrons, which produce Cherenkov light in an aerogel or a fused silica medium. The ACD/C was fielded at the NRL when Mercury was tuned to produce up to 4.8 MeV endpoint bremsstrahlung. Despite a high radiation and electromagnetic interference background, the ACD/C was able to achieve high signal over noise across five aerogel densities and fused silica, including a signal to noise for a 1.1 MeV aerogel threshold. Previous experiments at Cygnus observed a signal that was comparable to the noise (1×) at the same threshold. The ACD/C observed time-resolved rise and fall times for different energy thresholds of the photon spectrum. Finally, Monte Carlo simulations of themore » ACD/C’s aerogel response curves were folded with a simulation of Mercury’s photon energy spectrum and agree within the error to the observed result.« less

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2]; ORCiD logo [2];  [2];  [2]; ORCiD logo [2];  [2]; ORCiD logo [3];  [3];  [3];  [3]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Mission Support and Test Services, Las Vegas, NV (United States)
  3. Naval Research Lab. (NRL), Washington, DC (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1479994
Alternate Identifier(s):
OSTI ID: 1476132
Report Number(s):
LA-UR-18-23983
Journal ID: ISSN 0034-6748
Grant/Contract Number:  
AC52-06NA25396; NA0003624
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 89; Journal Issue: 10; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; photon spectra; aerogel; Cherenkov detectors; Cygnus; bremsstrahlung; X-ray spectroscopy

Citation Formats

Meaney, K. D., Kim, Y., Herrmann, H. W., Young, C. Y., Archuleta, T. A., Hamilton, C. E., Duke, D. L., Haines, T. J., Corredor, A. C., Green, J. A., Fegenbush, L., Kaufman, M. I., Malone, R. M., Baker, S. A., Richardson, S., Zier, J., Engelbrecht, J., and Culver, A. Characterization of the Mercury pulsed power x-ray source spectrum using multichannel density aerogel Cherenkov detectors. United States: N. p., 2018. Web. doi:10.1063/1.5038745.
Meaney, K. D., Kim, Y., Herrmann, H. W., Young, C. Y., Archuleta, T. A., Hamilton, C. E., Duke, D. L., Haines, T. J., Corredor, A. C., Green, J. A., Fegenbush, L., Kaufman, M. I., Malone, R. M., Baker, S. A., Richardson, S., Zier, J., Engelbrecht, J., & Culver, A. Characterization of the Mercury pulsed power x-ray source spectrum using multichannel density aerogel Cherenkov detectors. United States. doi:10.1063/1.5038745.
Meaney, K. D., Kim, Y., Herrmann, H. W., Young, C. Y., Archuleta, T. A., Hamilton, C. E., Duke, D. L., Haines, T. J., Corredor, A. C., Green, J. A., Fegenbush, L., Kaufman, M. I., Malone, R. M., Baker, S. A., Richardson, S., Zier, J., Engelbrecht, J., and Culver, A. Thu . "Characterization of the Mercury pulsed power x-ray source spectrum using multichannel density aerogel Cherenkov detectors". United States. doi:10.1063/1.5038745. https://www.osti.gov/servlets/purl/1479994.
@article{osti_1479994,
title = {Characterization of the Mercury pulsed power x-ray source spectrum using multichannel density aerogel Cherenkov detectors},
author = {Meaney, K. D. and Kim, Y. and Herrmann, H. W. and Young, C. Y. and Archuleta, T. A. and Hamilton, C. E. and Duke, D. L. and Haines, T. J. and Corredor, A. C. and Green, J. A. and Fegenbush, L. and Kaufman, M. I. and Malone, R. M. and Baker, S. A. and Richardson, S. and Zier, J. and Engelbrecht, J. and Culver, A.},
abstractNote = {The Aerogel Cherenkov Detector for Cygnus (ACD/C) is a time-dependent, x-ray spectral detector that uses SiO2 aerogels spanning an index of refraction (n = 1.02–1.07) corresponding to a 1.1–2.3 MeV x-ray energy threshold. The ACD/C was developed for pulsed power x-ray sources like Cygnus located at the Nevada National Site and Mercury located at the Naval Research Laboratory (NRL). Aerogels sit between the measurement capabilities of gas (>2 MeV) and solids such as fused silica (>0.3 MeV). The detector uses an aluminum converter to Compton scatter incoming x-rays and create relativistic electrons, which produce Cherenkov light in an aerogel or a fused silica medium. The ACD/C was fielded at the NRL when Mercury was tuned to produce up to 4.8 MeV endpoint bremsstrahlung. Despite a high radiation and electromagnetic interference background, the ACD/C was able to achieve high signal over noise across five aerogel densities and fused silica, including a signal to noise for a 1.1 MeV aerogel threshold. Previous experiments at Cygnus observed a signal that was comparable to the noise (1×) at the same threshold. The ACD/C observed time-resolved rise and fall times for different energy thresholds of the photon spectrum. Finally, Monte Carlo simulations of the ACD/C’s aerogel response curves were folded with a simulation of Mercury’s photon energy spectrum and agree within the error to the observed result.},
doi = {10.1063/1.5038745},
journal = {Review of Scientific Instruments},
number = 10,
volume = 89,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
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Figures / Tables:

Figure 1 Figure 1: Cartoon layout of Mercury and ACD/C set up with a detailed diagram of ACD/C itself, not to scale.

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Works referenced in this record:

Photo-Neutron Thresholds of Beryllium and Deuterium
journal, November 1950


Gamma Ray Measurements at OMEGA with the Newest Gas Cherenkov Detector “GCD-3”
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Aerogel Cherenkov detectors in colliding beam experiments
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