Open AccessTop-level physics requirements and simulated performance of the MRSt on the National Ignition Facility
Author(s) -
J. H. Kunimune,
J. A. Frenje,
G.P.A. Berg,
C. Trosseille,
R. Nora,
C. Waltz,
A. S. Moore,
J. D. Kilkenny,
A. J. Mackin
Publication year - 2021
Publication title -
review of scientific instruments
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.605
H-Index - 165
eISSN - 1089-7623
pISSN - 0034-6748
DOI - 10.1063/5.0040745
Subject(s) - national ignition facility , implosion , inertial confinement fusion , neutron , physics , national laboratory , spectrometer , nuclear engineering , nuclear physics , monte carlo method , recoil , ignition system , area density , plasma , optics , thermodynamics , engineering , statistics , mathematics , engineering physics
The time-resolving Magnetic Recoil Spectrometer (MRSt) for the National Ignition Facility (NIF) has been identified by the US National Diagnostic Working Group as one of the transformational diagnostics that will reshape the way inertial confinement fusion (ICF) implosions are diagnosed. The MRSt will measure the time-resolved neutron spectrum of an implosion, from which the time-resolved ion temperature, areal density, and yield will be inferred. Top-level physics requirements for the MRSt were determined based on simulations of numerous ICF implosions with varying degrees of alpha heating, P2 asymmetry, and mix. Synthetic MRSt data were subsequently generated for different configurations using Monte-Carlo methods to determine its performance in relation to the requirements. The system was found to meet most requirements at current neutron yields at the NIF. This work was supported by the DOE and LLNL.
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