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Title: Improvements in Fabrication of Elastic Scattering Foils Used to Measure Neutron Yield by the Magnetic Recoil Spectrometer

Abstract

The magnetic recoil spectrometer uses a deuterated polyethylene polymer (CD 2) foil to measure neutron yield in inertial confinement fusion experiments. Higher neutron yields in recent experiments have resulted in primary signal saturation in the detector CR-39 foils, necessitating the fabrication of thinner CD 2 foils than established methods could provide. A novel method of fabricating deuterated polymer foils is described. The resulting foils are thinner, smoother, and more uniform in thickness than the foils produced by previous methods. Here, these new foils have successfully been deployed at the National Ignition Facility, enabling higher neutron yield measurements than previous foils, with no primary signal saturation.

Authors:
 [1];  [1];  [1];  [2];  [3];  [2]
  1. General Atomics, San Diego, CA (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center, High Energy Density Physics Div.; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1311873
Alternate Identifier(s):
OSTI ID: 1389993
Report Number(s):
LLNL-JRNL-737387
Journal ID: ISSN 1536-1055; TRN: US1700089
Grant/Contract Number:  
NA0002949; NA0001857; AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Fusion Science and Technology
Additional Journal Information:
Journal Volume: 70; Journal Issue: 2; Journal ID: ISSN 1536-1055
Publisher:
American Nuclear Society
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; deuterated polymer; magnetic recoil spectrometer; glow discharge polymer; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Reynolds, H. G., Schoff, M. E., Farrell, M. P., Gatu Johnson, M., Bionta, R. M., and Frenje, J. A. Improvements in Fabrication of Elastic Scattering Foils Used to Measure Neutron Yield by the Magnetic Recoil Spectrometer. United States: N. p., 2017. Web. doi:10.13182/FST15-235.
Reynolds, H. G., Schoff, M. E., Farrell, M. P., Gatu Johnson, M., Bionta, R. M., & Frenje, J. A. Improvements in Fabrication of Elastic Scattering Foils Used to Measure Neutron Yield by the Magnetic Recoil Spectrometer. United States. doi:10.13182/FST15-235.
Reynolds, H. G., Schoff, M. E., Farrell, M. P., Gatu Johnson, M., Bionta, R. M., and Frenje, J. A. Thu . "Improvements in Fabrication of Elastic Scattering Foils Used to Measure Neutron Yield by the Magnetic Recoil Spectrometer". United States. doi:10.13182/FST15-235. https://www.osti.gov/servlets/purl/1311873.
@article{osti_1311873,
title = {Improvements in Fabrication of Elastic Scattering Foils Used to Measure Neutron Yield by the Magnetic Recoil Spectrometer},
author = {Reynolds, H. G. and Schoff, M. E. and Farrell, M. P. and Gatu Johnson, M. and Bionta, R. M. and Frenje, J. A.},
abstractNote = {The magnetic recoil spectrometer uses a deuterated polyethylene polymer (CD2) foil to measure neutron yield in inertial confinement fusion experiments. Higher neutron yields in recent experiments have resulted in primary signal saturation in the detector CR-39 foils, necessitating the fabrication of thinner CD2 foils than established methods could provide. A novel method of fabricating deuterated polymer foils is described. The resulting foils are thinner, smoother, and more uniform in thickness than the foils produced by previous methods. Here, these new foils have successfully been deployed at the National Ignition Facility, enabling higher neutron yield measurements than previous foils, with no primary signal saturation.},
doi = {10.13182/FST15-235},
journal = {Fusion Science and Technology},
issn = {1536-1055},
number = 2,
volume = 70,
place = {United States},
year = {2017},
month = {3}
}

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Works referenced in this record:

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