Application of the coincidence counting technique to DD neutron spectrometry data at the NIF, OMEGA, and Z

Lahmann, B.; Milanese, L. M.; Han, W.; Gatu Johnson, M.; Séguin, F. H.; Frenje, J. A.; Petrasso, R. D.; Hahn, K. D.; Jones, B.

doi:10.1063/1.4958910

Title: Application of the coincidence counting technique to DD neutron spectrometry data at the NIF, OMEGA, and Z

Journal Article · Wed Jul 20 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4958910· OSTI ID:1285035

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^[1]; Gatu Johnson, M. ^[1]; Séguin, F. H. ^[1];

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^[1]; Hahn, K. D. ^[2]; Jones, B. ^[2]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

A compact neutron spectrometer, based on a CH foil for the production of recoil protons and CR-39 detection, is being developed for the measurements of the DD-neutron spectrum at the NIF, OMEGA, and Z facilities. As a CR-39 detector will be used in the spectrometer, the principal sources of background are neutron-induced tracks and intrinsic tracks (defects in the CR-39). To reject the background to the required level for measurements of the down-scattered and primary DD-neutron components in the spectrum, the Coincidence Counting Technique (CCT) must be applied to the data. Using a piece of CR-39 exposed to 2.5-MeV protons at the MIT HEDP accelerator facility and DD-neutrons at Z, a significant improvement of a DD-neutron signal-to-background level has been demonstrated for the first time using the CCT. Furthermore, these results are in excellent agreement with previous work applied to DT neutrons.

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Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center; HEDP Div.; Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0002949; NA0002726; NA0001857; AC04-94AL85000; 1340868

OSTI ID:: 1285035

Alternate ID(s):: OSTI ID: 1338308

Report Number(s):: SAND-2016-6470J; RSINAK

Journal Information:: Review of Scientific Instruments, Vol. 87, Issue 11; Conference: 21. Topical Conference on High Temperature Plasma Diagnostics (HTPD 2016), Madison, WI (United States), 5-9 Jun 2016; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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References (9)

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Probing high areal-density cryogenic deuterium-tritium implosions using downscattered neutron spectra measured by the magnetic recoil spectrometer Frenje, J. A.; Casey, D. T.; Li, C. K. Physics of Plasmas, Vol. 17, Issue 5 https://doi.org/10.1063/1.3304475	journal	May 2010
Absolute measurements of neutron yields from DD and DT implosions at the OMEGA laser facility using CR-39 track detectors Frenje, J. A.; Li, C. K.; Séguin, F. H. Review of Scientific Instruments, Vol. 73, Issue 7 https://doi.org/10.1063/1.1487889	journal	July 2002
First measurements of the absolute neutron spectrum using the magnetic recoil spectrometer at OMEGA (invited) Frenje, J. A.; Casey, D. T.; Li, C. K. Review of Scientific Instruments, Vol. 79, Issue 10 https://doi.org/10.1063/1.2956837	journal	October 2008
Upgrade of the MIT Linear Electrostatic Ion Accelerator (LEIA) for nuclear diagnostics development for Omega, Z and the NIF Sinenian, N.; Manuel, M. J. -E.; Zylstra, A. B. Review of Scientific Instruments, Vol. 83, Issue 4 https://doi.org/10.1063/1.3703315	journal	April 2012
Pulsed-power-driven cylindrical liner implosions of laser preheated fuel magnetized with an axial field Slutz, S. A.; Herrmann, M. C.; Vesey, R. A. Physics of Plasmas, Vol. 17, Issue 5 https://doi.org/10.1063/1.3333505	journal	May 2010
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Spectrometry of charged particles from inertial-confinement-fusion plasmas Séguin, F. H.; Frenje, J. A.; Li, C. K. Review of Scientific Instruments, Vol. 74, Issue 2 https://doi.org/10.1063/1.1518141	journal	February 2003
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Cited By (1)

Nuclear diagnostics for Inertial Confinement Fusion (ICF) plasmas Frenje, J. A. Plasma Physics and Controlled Fusion, Vol. 62, Issue 2 https://doi.org/10.1088/1361-6587/ab5137	journal	January 2020

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