Improvements in Fabrication of Elastic Scattering Foils Used to Measure Neutron Yield by the Magnetic Recoil Spectrometer

Reynolds, H. G.; Schoff, M. E.; Farrell, M. P.; Gatu Johnson, M.; Bionta, R. M.; Frenje, J. A.

doi:10.13182/FST15-235

Improvements in Fabrication of Elastic Scattering Foils Used to Measure Neutron Yield by the Magnetic Recoil Spectrometer

Journal Article · Thu Mar 23 00:00:00 EDT 2017 · Fusion Science and Technology

DOI:https://doi.org/10.13182/FST15-235· OSTI ID:1311873

Reynolds, H. G. ^[1]; Schoff, M. E. ^[2]; Farrell, M. P. ^[2]; Gatu Johnson, M. ^[3]; Bionta, R. M. ^[4]; Frenje, J. A. ^[3]

General Atomics, San Diego, CA (United States); HEDP DIVISION, MIT PLASMA SCIENCE AND FUSION CENTER
General Atomics, San Diego, CA (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

The magnetic recoil spectrometer uses a deuterated polyethylene polymer (CD₂) foil to measure neutron yield in inertial confinement fusion experiments. Higher neutron yields in recent experiments have resulted in primary signal saturation in the detector CR-39 foils, necessitating the fabrication of thinner CD₂ foils than established methods could provide. A novel method of fabricating deuterated polymer foils is described. The resulting foils are thinner, smoother, and more uniform in thickness than the foils produced by previous methods. Here, these new foils have successfully been deployed at the National Ignition Facility, enabling higher neutron yield measurements than previous foils, with no primary signal saturation.

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center, HEPD

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

Grant/Contract Number:: AC52-07NA27344; NA0001857; NA0002949

OSTI ID:: 1311873

Alternate ID(s):: OSTI ID: 1389993

Report Number(s):: LLNL-JRNL--737387

Journal Information:: Fusion Science and Technology, Journal Name: Fusion Science and Technology Journal Issue: 2 Vol. 70; ISSN 1536-1055

Publisher:: American Nuclear SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited By (1)

Implementation of the foil-on-hohlraum technique for the magnetic recoil spectrometer for time-resolved neutron measurements at the National Ignition Facility Parker, C. E.; Frenje, J. A.; Johnson, M. Gatu Review of Scientific Instruments, Vol. 89, Issue 11 https://doi.org/10.1063/1.5052184	journal	November 2018

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
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Improvements in Fabrication of Elastic Scattering Foils Used to Measure Neutron Yield by the Magnetic Recoil Spectrometer

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References (14)

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