The magnetic recoil spectrometer (MRSt) for time-resolved measurements of the neutron spectrum at the National Ignition Facility (NIF)

Frenje, J. A.; Hilsabeck, T. J.; Wink, C. W.; Bell, P.; Bionta, R.; Cerjan, C.; Gatu Johnson, M.; Kilkenny, J. D.; Li, C. K.; Séguin, F. H.; Petrasso, R. D.

doi:10.1063/1.4959164

The magnetic recoil spectrometer (MRSt) for time-resolved measurements of the neutron spectrum at the National Ignition Facility (NIF)

Journal Article · Tue Aug 02 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4959164· OSTI ID:1285117

^[1]; Hilsabeck, T. J. ^[2]; Wink, C. W. ^[3]; Bell, P. ^[4]; Bionta, R. ^[4]; ^[4]; Gatu Johnson, M. ^[3]; Kilkenny, J. D. ^[2]; Li, C. K. ^[3]; Séguin, F. H. ^[3]; ^[3]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (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 next-generation magnetic recoil spectrometer for time-resolved measurements of the neutron spectrum has been conceptually designed for the National Ignition Facility. This spectrometer, called MRSt, represents a paradigm shift in our thinking about neutron spectrometry for inertial confinement fusion applications, as it will provide simultaneously information about the burn history and time evolution of areal density (ρR), apparent ion temperature (T_i), yield (Y_n), and macroscopic flows during burn. From this type of data, an assessment of the evolution of the fuel assembly, hotspot, and alpha heating can be made. According to simulations, the MRSt will provide accurate data with a time resolution of ~20 ps and energy resolution of ~100 keV for total neutron yields above ~10¹⁶. Lastly, at lower yields, the diagnostic will be operated at a higher-efficiency, lower-energy-resolution mode to provide a time resolution of ~20 ps.

View Accepted Manuscript (DOE)

Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center. HEDP Div.

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

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

OSTI ID:: 1285117

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 11 Vol. 87; ISSN 0034-6748; ISSN RSINAK

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

Country of Publication:: United States

Language:: English

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Cited By (3)

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
Response of a lead-free borosilicate-glass microchannel plate to 14-MeV neutrons and γ-rays Parker, C. E.; Frenje, J. A.; Siegmund, O. H. W. Review of Scientific Instruments, Vol. 90, Issue 10 https://doi.org/10.1063/1.5109103	journal	October 2019
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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