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Title: One dimensional imager of neutrons on the Z machine

Abstract

We recently developed a one-dimensional imager of neutrons on the Z facility. The instrument is designed for Magnetized Liner Inertial Fusion (MagLIF) experiments, which produce D-D neutrons yields of ~3 × 10 12. X-ray imaging indicates that the MagLIF stagnation region is a 10-mm long, ~100-μm diameter column. The small radial extents and present yields precluded useful radial resolution, so a one-dimensional imager was developed. The imaging component is a 100-mm thick tungsten slit; a rolled-edge slit limits variations in the acceptance angle along the source. CR39 was chosen as a detector due to its negligible sensitivity to the bright x-ray environment in Z. A layer of high density poly-ethylene is used to enhance the sensitivity of CR39. Finally, we present data from fielding the instrument on Z, demonstrating reliable imaging and track densities consistent with diagnosed yields. For yields ~3 × 10 12, we obtain resolutions of ~500 μm.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [2];  [3];  [1]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [4];  [1];  [1]; ORCiD logo [1];  [1];  [1];  [1];  [1];  [5];  [1];  [1];  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  5. Univ. of New Mexico, Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1483980
Alternate Identifier(s):
OSTI ID: 1477212
Report Number(s):
SAND-2018-13169J
Journal ID: ISSN 0034-6748; 670012
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article: 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

Citation Formats

Ampleford, David J., Ruiz, Carlos L., Fittinghoff, David N., Vaughan, Jeremy D., Hahn, Kelly, Lahmann, Brandon, Gatu-Johnson, Maria, Frenje, Johan, Petrasso, Richard, Ball, Christopher R., Maurer, Andrew J., Knapp, Patrick F., Harvey-Thompson, Adam J., Fisher, John, Alberto, Perry, Torres, Jose A., Cooper, Gary, Jones, Brent, Rochau, Gregory A., and May, Mark J. One dimensional imager of neutrons on the Z machine. United States: N. p., 2018. Web. doi:10.1063/1.5038118.
Ampleford, David J., Ruiz, Carlos L., Fittinghoff, David N., Vaughan, Jeremy D., Hahn, Kelly, Lahmann, Brandon, Gatu-Johnson, Maria, Frenje, Johan, Petrasso, Richard, Ball, Christopher R., Maurer, Andrew J., Knapp, Patrick F., Harvey-Thompson, Adam J., Fisher, John, Alberto, Perry, Torres, Jose A., Cooper, Gary, Jones, Brent, Rochau, Gregory A., & May, Mark J. One dimensional imager of neutrons on the Z machine. United States. doi:10.1063/1.5038118.
Ampleford, David J., Ruiz, Carlos L., Fittinghoff, David N., Vaughan, Jeremy D., Hahn, Kelly, Lahmann, Brandon, Gatu-Johnson, Maria, Frenje, Johan, Petrasso, Richard, Ball, Christopher R., Maurer, Andrew J., Knapp, Patrick F., Harvey-Thompson, Adam J., Fisher, John, Alberto, Perry, Torres, Jose A., Cooper, Gary, Jones, Brent, Rochau, Gregory A., and May, Mark J. Fri . "One dimensional imager of neutrons on the Z machine". United States. doi:10.1063/1.5038118. https://www.osti.gov/servlets/purl/1483980.
@article{osti_1483980,
title = {One dimensional imager of neutrons on the Z machine},
author = {Ampleford, David J. and Ruiz, Carlos L. and Fittinghoff, David N. and Vaughan, Jeremy D. and Hahn, Kelly and Lahmann, Brandon and Gatu-Johnson, Maria and Frenje, Johan and Petrasso, Richard and Ball, Christopher R. and Maurer, Andrew J. and Knapp, Patrick F. and Harvey-Thompson, Adam J. and Fisher, John and Alberto, Perry and Torres, Jose A. and Cooper, Gary and Jones, Brent and Rochau, Gregory A. and May, Mark J.},
abstractNote = {We recently developed a one-dimensional imager of neutrons on the Z facility. The instrument is designed for Magnetized Liner Inertial Fusion (MagLIF) experiments, which produce D-D neutrons yields of ~3 × 1012. X-ray imaging indicates that the MagLIF stagnation region is a 10-mm long, ~100-μm diameter column. The small radial extents and present yields precluded useful radial resolution, so a one-dimensional imager was developed. The imaging component is a 100-mm thick tungsten slit; a rolled-edge slit limits variations in the acceptance angle along the source. CR39 was chosen as a detector due to its negligible sensitivity to the bright x-ray environment in Z. A layer of high density poly-ethylene is used to enhance the sensitivity of CR39. Finally, we present data from fielding the instrument on Z, demonstrating reliable imaging and track densities consistent with diagnosed yields. For yields ~3 × 1012, we obtain resolutions of ~500 μm.},
doi = {10.1063/1.5038118},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 10,
volume = 89,
place = {United States},
year = {2018},
month = {10}
}

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