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Title: ATHENA: A unique radiation environment platform at the National Ignition Facility

Abstract

This paper describes the ATHENA platform, an energy tuning assembly, which was developed to spectrally shape the National Ignition Facility (NIF) deuterium–tritium fusion neutron source to a thermonuclear (fusion) plus prompt fission neutron spectrum with a capability to act as a short-pulse neutron source. This unique, otherwise inaccessible radiation environment complements existing experimental facilities and capabilities. Here, the flexible ATHENA irradiation positions were modeled using an ensemble of Monte Carlo simulations with stochastic sampling of the nuclear cross-sections to characterize the radiation environments and uncertainty for the platform. Validation of the internal neutron spectrum produced from fielding ATHENA at NIF occurred through neutron flux unfolding with 20 measured activation products.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [1];  [2];  [3];  [3]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Air Force Institute of Technology, Wright-Patterson AFB, OH (United States)
  2. Air Force Institute of Technology, Wright-Patterson AFB, OH (United States); Wright State Univ., Dayton, OH (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
OSTI Identifier:
1881623
Alternate Identifier(s):
OSTI ID: 1868666
Report Number(s):
LLNL-JRNL-838442
Journal ID: ISSN 0168-9002; 1057728; TRN: US2307861
Grant/Contract Number:  
AC52-07NA27344; NA000103
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 1016; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; Short-pulse neutron source; Neutron energy tuning; Radiation effects experiment; Neutron spectrum unfolding

Citation Formats

Quartemont, Nicholas J., Peterson, George, Moran, Colton, Samin, Adib, Wang, Buguo, Yeamans, Charles, Woodworth, Brandon, Holland, Darren, Petrosky, James C., and Bevins, James E. ATHENA: A unique radiation environment platform at the National Ignition Facility. United States: N. p., 2021. Web. doi:10.1016/j.nima.2021.165777.
Quartemont, Nicholas J., Peterson, George, Moran, Colton, Samin, Adib, Wang, Buguo, Yeamans, Charles, Woodworth, Brandon, Holland, Darren, Petrosky, James C., & Bevins, James E. ATHENA: A unique radiation environment platform at the National Ignition Facility. United States. https://doi.org/10.1016/j.nima.2021.165777
Quartemont, Nicholas J., Peterson, George, Moran, Colton, Samin, Adib, Wang, Buguo, Yeamans, Charles, Woodworth, Brandon, Holland, Darren, Petrosky, James C., and Bevins, James E. Tue . "ATHENA: A unique radiation environment platform at the National Ignition Facility". United States. https://doi.org/10.1016/j.nima.2021.165777. https://www.osti.gov/servlets/purl/1881623.
@article{osti_1881623,
title = {ATHENA: A unique radiation environment platform at the National Ignition Facility},
author = {Quartemont, Nicholas J. and Peterson, George and Moran, Colton and Samin, Adib and Wang, Buguo and Yeamans, Charles and Woodworth, Brandon and Holland, Darren and Petrosky, James C. and Bevins, James E.},
abstractNote = {This paper describes the ATHENA platform, an energy tuning assembly, which was developed to spectrally shape the National Ignition Facility (NIF) deuterium–tritium fusion neutron source to a thermonuclear (fusion) plus prompt fission neutron spectrum with a capability to act as a short-pulse neutron source. This unique, otherwise inaccessible radiation environment complements existing experimental facilities and capabilities. Here, the flexible ATHENA irradiation positions were modeled using an ensemble of Monte Carlo simulations with stochastic sampling of the nuclear cross-sections to characterize the radiation environments and uncertainty for the platform. Validation of the internal neutron spectrum produced from fielding ATHENA at NIF occurred through neutron flux unfolding with 20 measured activation products.},
doi = {10.1016/j.nima.2021.165777},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = ,
volume = 1016,
place = {United States},
year = {Tue Sep 07 00:00:00 EDT 2021},
month = {Tue Sep 07 00:00:00 EDT 2021}
}

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