High-resolution measurements of the DT neutron spectrum using new CD foils in the Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility

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

DOI:https://doi.org/10.1063/1.4959946· OSTI ID:22596537

Frenje, J. A.; Li, C. K.; Petrasso, R. D.; Séguin, F. H. ^[1]; Bionta, R. M.; Casey, D. T.; Eckart, M. J.; Grim, G. P.; Hartouni, E. P.; Hatarik, R.; Sayre, D. B.; Skulina, K.; Yeamans, C. B. ^[2]; Farrell, M. P.; Hoppe, M.; Kilkenny, J. D.; Reynolds, H. G.; Schoff, M. E. ^[3]

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1. Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
2. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
3. General Atomics, San Diego, California 92186 (United States)

The Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility measures the DT neutron spectrum from cryogenically layered inertial confinement fusion implosions. Yield, areal density, apparent ion temperature, and directional fluid flow are inferred from the MRS data. This paper describes recent advances in MRS measurements of the primary peak using new, thinner, reduced-area deuterated plastic (CD) conversion foils. The new foils allow operation of MRS at yields 2 orders of magnitude higher than previously possible, at a resolution down to ∼200 keV FWHM.

• OSTI ID: 22596537
• 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
DENSITY
FLUID FLOW
FOILS
IGNITION
IMPLOSIONS
INERTIAL CONFINEMENT
ION TEMPERATURE
KEV RANGE 100-1000
NEUTRON SPECTRA
NEUTRON SPECTROMETERS
NEUTRONS
PLASTICS
RECOILS
RESOLUTION
US NATIONAL IGNITION FACILITY