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Title: Simultaneous neutron and x-ray imaging of inertial confinement fusion experiments along a single line of sight at Omega

Abstract

Neutron and x-ray imaging provide critical information about the geometry and hydrodynamics of inertial confinement fusion implosions. However, existing diagnostics at Omega and the National Ignition Facility (NIF) cannot produce images in both neutrons and x-rays along the same line of sight. This leads to difficulty comparing these images, which capture different parts of the plasma geometry, for the asymmetric implosions seen in present experiments. Further, even when opposing port neutron and x-ray images are available, they use different detectors and cannot provide positive information about the relative positions of the neutron and x-ray sources. A technique has been demonstrated on implosions at Omega that can capture x-ray images along the same line of sight as the neutron images. Thus, the technique is described, and data from a set of experiments are presented, along with a discussion of techniques for coregistration of the various images. It is concluded that the technique is viable and could provide valuable information if implemented on NIF in the near future.

Authors:
 [1];  [1];  [2];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
+ Show Author Affiliations
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1233523
Alternate Identifier(s):
OSTI ID: 1228190
Report Number(s):
LA-UR-15-21310
Journal ID: ISSN 0034-6748; RSINAK
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 86; Journal Issue: 4; 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; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; x-ray imaging; neutrons; neutron imaging; image reconstruction; neutron sources

Citation Formats

Danly, C. R., Day, T. H., Fittinghoff, D. N., Herrmann, H., Izumi, N., Kim, Y. H., Martinez, J. I., Merrill, F. E., Schmidt, D. W., Simpson, R. A., Volegov, P. L., and Wilde, C. H. Simultaneous neutron and x-ray imaging of inertial confinement fusion experiments along a single line of sight at Omega. United States: N. p., 2015. Web. doi:10.1063/1.4918285.
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Danly, C. R., Day, T. H., Fittinghoff, D. N., Herrmann, H., Izumi, N., Kim, Y. H., Martinez, J. I., Merrill, F. E., Schmidt, D. W., Simpson, R. A., Volegov, P. L., & Wilde, C. H. Simultaneous neutron and x-ray imaging of inertial confinement fusion experiments along a single line of sight at Omega. United States. https://doi.org/10.1063/1.4918285
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Danly, C. R., Day, T. H., Fittinghoff, D. N., Herrmann, H., Izumi, N., Kim, Y. H., Martinez, J. I., Merrill, F. E., Schmidt, D. W., Simpson, R. A., Volegov, P. L., and Wilde, C. H. Thu . "Simultaneous neutron and x-ray imaging of inertial confinement fusion experiments along a single line of sight at Omega". United States. https://doi.org/10.1063/1.4918285. https://www.osti.gov/servlets/purl/1233523.
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@article{osti_1233523,
title = {Simultaneous neutron and x-ray imaging of inertial confinement fusion experiments along a single line of sight at Omega},
author = {Danly, C. R. and Day, T. H. and Fittinghoff, D. N. and Herrmann, H. and Izumi, N. and Kim, Y. H. and Martinez, J. I. and Merrill, F. E. and Schmidt, D. W. and Simpson, R. A. and Volegov, P. L. and Wilde, C. H.},
abstractNote = {Neutron and x-ray imaging provide critical information about the geometry and hydrodynamics of inertial confinement fusion implosions. However, existing diagnostics at Omega and the National Ignition Facility (NIF) cannot produce images in both neutrons and x-rays along the same line of sight. This leads to difficulty comparing these images, which capture different parts of the plasma geometry, for the asymmetric implosions seen in present experiments. Further, even when opposing port neutron and x-ray images are available, they use different detectors and cannot provide positive information about the relative positions of the neutron and x-ray sources. A technique has been demonstrated on implosions at Omega that can capture x-ray images along the same line of sight as the neutron images. Thus, the technique is described, and data from a set of experiments are presented, along with a discussion of techniques for coregistration of the various images. It is concluded that the technique is viable and could provide valuable information if implemented on NIF in the near future.},
doi = {10.1063/1.4918285},
journal = {Review of Scientific Instruments},
number = 4,
volume = 86,
place = {United States},
year = {Thu Apr 16 00:00:00 EDT 2015},
month = {Thu Apr 16 00:00:00 EDT 2015}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1063/1.4918285
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Works referenced in this record:

A concept to collect neutron and x-ray images on the same line of sight at NIF
journal, November 2014

  • Merrill, F. E.; Danly, C. R.; Izumi, N.
  • Review of Scientific Instruments, Vol. 85, Issue 11
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journal, October 2010

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journal, October 2012

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Self characterization of a coded aperture array for neutron source imaging
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  • DOI: 10.1063/1.4902978

First results of pinhole neutron imaging for inertial confinement fusion
journal, May 2003

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journal, January 1995

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    Works referencing / citing this record:

    Impact of imposed mode 2 laser drive asymmetry on inertial confinement fusion implosions
    journal, January 2019

    • Gatu Johnson, M.; Appelbe, B. D.; Chittenden, J. P.
    • Physics of Plasmas, Vol. 26, Issue 1
    • DOI: 10.1063/1.5066435
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