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Title: Extension of the neutron scatter camera sensitivity to the ~10–200 MeV neutron energy range

Abstract

The Neutron Scatter Camera (NSC) is a neutron spectrometer and imager that has been developed and improved by the Sandia National Laboratories for several years. Built for special nuclear material searches, the instrument was configured by the design to reconstruct neutron sources within the fission energy range 1–10 MeV. In this work, we present modifications that attempt to extend the NSC sensitivity to neutron energies in the range ~10–200 MeV and discuss the corresponding consequences for the event processing. We present simulation results that manifest important aspects of the NSC response to those intermediate energy neutrons. The simulation results also evidence that the instrument’s spectroscopic capabilities severely deteriorate at those energies, mainly due to the uncertainties in measuring energy, time, and distance between the two neutron scattering interactions. Furthermore, this work is motivated by the need to characterize neutron fluxes at particle accelerators as they may represent important backgrounds for neutrino experiments.

Authors:
 [1]; ORCiD logo [1];  [1];  [1]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1529301
Alternate Identifier(s):
OSTI ID: 1515589
Report Number(s):
SAND-2018-11278J
Journal ID: ISSN 0034-6748; 669547
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 90; Journal Issue: 5; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Palmer, Belkis Cabrera, Brubaker, Erik, Gerling, Mark D., and Reyna, David. Extension of the neutron scatter camera sensitivity to the ~10–200 MeV neutron energy range. United States: N. p., 2019. Web. doi:10.1063/1.5091715.
Palmer, Belkis Cabrera, Brubaker, Erik, Gerling, Mark D., & Reyna, David. Extension of the neutron scatter camera sensitivity to the ~10–200 MeV neutron energy range. United States. doi:10.1063/1.5091715.
Palmer, Belkis Cabrera, Brubaker, Erik, Gerling, Mark D., and Reyna, David. Fri . "Extension of the neutron scatter camera sensitivity to the ~10–200 MeV neutron energy range". United States. doi:10.1063/1.5091715.
@article{osti_1529301,
title = {Extension of the neutron scatter camera sensitivity to the ~10–200 MeV neutron energy range},
author = {Palmer, Belkis Cabrera and Brubaker, Erik and Gerling, Mark D. and Reyna, David},
abstractNote = {The Neutron Scatter Camera (NSC) is a neutron spectrometer and imager that has been developed and improved by the Sandia National Laboratories for several years. Built for special nuclear material searches, the instrument was configured by the design to reconstruct neutron sources within the fission energy range 1–10 MeV. In this work, we present modifications that attempt to extend the NSC sensitivity to neutron energies in the range ~10–200 MeV and discuss the corresponding consequences for the event processing. We present simulation results that manifest important aspects of the NSC response to those intermediate energy neutrons. The simulation results also evidence that the instrument’s spectroscopic capabilities severely deteriorate at those energies, mainly due to the uncertainties in measuring energy, time, and distance between the two neutron scattering interactions. Furthermore, this work is motivated by the need to characterize neutron fluxes at particle accelerators as they may represent important backgrounds for neutrino experiments.},
doi = {10.1063/1.5091715},
journal = {Review of Scientific Instruments},
number = 5,
volume = 90,
place = {United States},
year = {2019},
month = {5}
}

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