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

Journal Article · Tue Nov 15 04:00:00 EST 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4958910· OSTI ID:22596622

Milanese, L. M.; Han, W.; Gatu Johnson, M.; Séguin, F. H.; Frenje, J. A.; Petrasso, R. D. ^[1]; Hahn, K. D.; Jones, B. ^[2]

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1. Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
2. Sandia National Laboratory, Albuquerque, New Mexico 87123 (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. These results are in excellent agreement with previous work applied to DT neutrons.

• OSTI ID: 22596622
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 11 Vol. 87; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACCELERATOR EXPERIMENTAL FACILITIES
ACCELERATORS
COINCIDENCE METHODS
FOILS
MEV RANGE
NEUTRON SPECTRA
NEUTRON SPECTROMETERS
NEUTRON SPECTROSCOPY
NEUTRONS
PARTICLE TRACKS
PROTONS
RECOILS
SIGNALS
US NATIONAL IGNITION FACILITY