Measuring the absolute DT neutron yield using the Magnetic Recoil Spectrometer at OMEGA and the NIF

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A Magnetic Recoil Spectrometer (MRS) has been installed and extensively used on OMEGA and the National Ignition Facility (NIF) for measurements of the absolute neutron spectrum from inertial confinement fusion (ICF) implosions. From the neutron spectrum measured with the MRS, many critical implosion parameters are determined including the primary DT neutron yield, the ion temperature, and the down-scattered neutron yield. As the MRS detection efficiency is determined from first principles, the absolute DT neutron yield is obtained without cross-calibration to other techniques. The MRS primary DT neutron measurements at OMEGA and the NIF are shown to be in excellent agreement ... continued below

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5 p. (0.2 MB)

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Mackinnon, A; Casey, D; Frenje, J A; Johnson, M G; Seguin, F H; Li, C K et al. May 3, 2012.

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A Magnetic Recoil Spectrometer (MRS) has been installed and extensively used on OMEGA and the National Ignition Facility (NIF) for measurements of the absolute neutron spectrum from inertial confinement fusion (ICF) implosions. From the neutron spectrum measured with the MRS, many critical implosion parameters are determined including the primary DT neutron yield, the ion temperature, and the down-scattered neutron yield. As the MRS detection efficiency is determined from first principles, the absolute DT neutron yield is obtained without cross-calibration to other techniques. The MRS primary DT neutron measurements at OMEGA and the NIF are shown to be in excellent agreement with previously established yield diagnostics on OMEGA, and with the newly commissioned nuclear activation diagnostics on the NIF.

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5 p. (0.2 MB)

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PDF-file: 5 pages; size: 0.2 Mbytes

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  • Presented at: 19th Topical Conference High-Temperature Plasma Diagnostics, Monterey, CA, United States, May 06 - May 10, 2012

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  • Report No.: LLNL-CONF-555812
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1043652
  • Archival Resource Key: ark:/67531/metadc833761

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Office of Scientific & Technical Information Technical Reports

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  • May 3, 2012

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  • May 19, 2016, 3:16 p.m.

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  • April 13, 2017, 6:12 p.m.

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Mackinnon, A; Casey, D; Frenje, J A; Johnson, M G; Seguin, F H; Li, C K et al. Measuring the absolute DT neutron yield using the Magnetic Recoil Spectrometer at OMEGA and the NIF, article, May 3, 2012; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc833761/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.