The NIF 4.5-m nTOF Detectors

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The first several campaigns of laser fusion experiments at the National Ignition Facility (NIF) included a family of high-sensitivity scintillator/photodetector neutron-time-of-flight (nTOF) detectors for measuring DD and DT neutron yields. The detectors provided consistent neutron yield benchmarks from below 1E9 (DD) to nearly 1E15 (DT). The detectors demonstrated DT yield measurement precisions better than 5%, but the absolute accuracy relies on cross calibration with independent measurements of absolute neutron yield. The 4.5-m nTOF data have provided a useful testbed for testing improvements in nTOF data processing, especially with respect to improving the accuracies of the detector impulse response functions. The ... continued below

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Moran, M J; Bond, E J; Clancy, T J; Eckart, M J; Khater, H Y & Glebov, V Y May 7, 2012.

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The first several campaigns of laser fusion experiments at the National Ignition Facility (NIF) included a family of high-sensitivity scintillator/photodetector neutron-time-of-flight (nTOF) detectors for measuring DD and DT neutron yields. The detectors provided consistent neutron yield benchmarks from below 1E9 (DD) to nearly 1E15 (DT). The detectors demonstrated DT yield measurement precisions better than 5%, but the absolute accuracy relies on cross calibration with independent measurements of absolute neutron yield. The 4.5-m nTOF data have provided a useful testbed for testing improvements in nTOF data processing, especially with respect to improving the accuracies of the detector impulse response functions. The resulting improvements in data analysis methods have produced more accurate results. In summary, results from the NIF 4.5-m nTOF detectors have provided consistent measurements of DD and DT neutron yields from laser-fusion implosions.

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PDF-file: 16 pages; size: 0.5 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-557603
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1043655
  • Archival Resource Key: ark:/67531/metadc841885

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  • May 7, 2012

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  • May 19, 2016, 3:16 p.m.

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  • Nov. 30, 2016, 12:59 p.m.

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Moran, M J; Bond, E J; Clancy, T J; Eckart, M J; Khater, H Y & Glebov, V Y. The NIF 4.5-m nTOF Detectors, article, May 7, 2012; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc841885/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.