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

doi:10.1063/1.4958910

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

Abstract

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. In conclusion, these results are in excellent agreement with previous work applied to DT neutrons.

Authors:

^[1];

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

^[1];

^[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)

Publication Date:: 2016-07-20

Research Org.:: 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 Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1285035

Alternate Identifier(s):: OSTI ID: 1338308

Report Number(s):: SAND-2016-6470J
Journal ID: ISSN 0034-6748; RSINAK

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

Resource Type:: Accepted Manuscript

Journal Name:: Review of Scientific Instruments

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

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; neutron; protons; etching; inertial confinement

Citation Formats


                    Lahmann, B., Milanese, L. M., Han, W., Gatu Johnson, M., Séguin, F. H., Frenje, J. A., Petrasso, R. D., Hahn, K. D., and Jones, B. Application of the coincidence counting technique to DD neutron spectrometry data at the NIF, OMEGA, and Z.  United States: N. p., 2016. 
        Web.  doi:10.1063/1.4958910.

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                    Lahmann, B., Milanese, L. M., Han, W., Gatu Johnson, M., Séguin, F. H., Frenje, J. A., Petrasso, R. D., Hahn, K. D., & Jones, B. Application of the coincidence counting technique to DD neutron spectrometry data at the NIF, OMEGA, and Z.  United States.  doi:10.1063/1.4958910.

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                    Lahmann, B., Milanese, L. M., Han, W., Gatu Johnson, M., Séguin, F. H., Frenje, J. A., Petrasso, R. D., Hahn, K. D., and Jones, B. Wed .  
        "Application of the coincidence counting technique to DD neutron spectrometry data at the NIF, OMEGA, and Z".  United States.  doi:10.1063/1.4958910.  https://www.osti.gov/servlets/purl/1285035.

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@article{osti_1285035,

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

  author       = {Lahmann, B. and Milanese, L. M. and Han, W. and Gatu Johnson, M. and Séguin, F. H. and Frenje, J. A. and Petrasso, R. D. and Hahn, K. D. and Jones, B.},

  abstractNote = {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. In conclusion, these results are in excellent agreement with previous work applied to DT neutrons.},

  doi          = {10.1063/1.4958910},

  journal      = {Review of Scientific Instruments},

  number       = 11,

  volume       = 87,

  place        = {United States},

  year         = {2016},

  month        = {7}

}

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Works referenced in this record:

A neutron spectrometer for precise measurements of DT neutrons from 10 to 18 MeV at OMEGA and the National Ignition Facility
journal, January 2001

Frenje, J. A.; Green, K. M.; Hicks, D. G.
Review of Scientific Instruments, Vol. 72, Issue 1
DOI: 10.1063/1.1323243

Probing high areal-density cryogenic deuterium-tritium implosions using downscattered neutron spectra measured by the magnetic recoil spectrometer
journal, May 2010

Frenje, J. A.; Casey, D. T.; Li, C. K.
Physics of Plasmas, Vol. 17, Issue 5
DOI: 10.1063/1.3304475

Absolute measurements of neutron yields from DD and DT implosions at the OMEGA laser facility using CR-39 track detectors
journal, July 2002

Frenje, J. A.; Li, C. K.; Séguin, F. H.
Review of Scientific Instruments, Vol. 73, Issue 7
DOI: 10.1063/1.1487889

First measurements of the absolute neutron spectrum using the magnetic recoil spectrometer at OMEGA (invited)
journal, October 2008

Frenje, J. A.; Casey, D. T.; Li, C. K.
Review of Scientific Instruments, Vol. 79, Issue 10
DOI: 10.1063/1.2956837

Upgrade of the MIT Linear Electrostatic Ion Accelerator (LEIA) for nuclear diagnostics development for Omega, Z and the NIF
journal, April 2012

Sinenian, N.; Manuel, M. J. -E.; Zylstra, A. B.
Review of Scientific Instruments, Vol. 83, Issue 4
DOI: 10.1063/1.3703315

Pulsed-power-driven cylindrical liner implosions of laser preheated fuel magnetized with an axial field
journal, May 2010

Slutz, S. A.; Herrmann, M. C.; Vesey, R. A.
Physics of Plasmas, Vol. 17, Issue 5
DOI: 10.1063/1.3333505

The coincidence counting technique for orders of magnitude background reduction in data obtained with the magnetic recoil spectrometer at OMEGA and the NIF
journal, July 2011

Casey, D. T.; Frenje, J. A.; Séguin, F. H.
Review of Scientific Instruments, Vol. 82, Issue 7
DOI: 10.1063/1.3605483

Spectrometry of charged particles from inertial-confinement-fusion plasmas
journal, February 2003

Séguin, F. H.; Frenje, J. A.; Li, C. K.
Review of Scientific Instruments, Vol. 74, Issue 2
DOI: 10.1063/1.1518141

Neutron spectrometry—An essential tool for diagnosing implosions at the National Ignition Facility (invited)
journal, October 2012

Johnson, M. Gatu; Frenje, J. A.; Casey, D. T.
Review of Scientific Instruments, Vol. 83, Issue 10
DOI: 10.1063/1.4728095

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

Abstract

Citation Formats

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The coincidence counting technique for orders of magnitude background reduction in data obtained with the magnetic recoil spectrometer at OMEGA and the NIF journal, July 2011

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Neutron spectrometry—An essential tool for diagnosing implosions at the National Ignition Facility (invited) journal, October 2012

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journal, January 2001

Probing high areal-density cryogenic deuterium-tritium implosions using downscattered neutron spectra measured by the magnetic recoil spectrometer
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