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Title: The magnetic recoil spectrometer for measurements of the absolute neutron spectrum at OMEGA and the NIF

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.4796042· OSTI ID:1172369
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  1. MIT, Cambridge, MA (United States). Plasma Science and Fusion Center
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energitics
  3. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  4. Sandia National Laboratories, Albuquerque, NM (United States)
  5. State Univ. of New York at Geneseo, NY (United States)
  6. General Atomics, San Diego, CA (United States)

The neutron spectrum produced by deuterium-tritium (DT) inertial confinement fusion implosions contains a wealth of information about implosion performance including the DT yield, iontemperature, and areal-density. The Magnetic Recoil Spectrometer (MRS) has been used at both the OMEGA laser facility and the National Ignition Facility (NIF) to measure the absolute neutron spectrum from 3 to 30 MeV at OMEGA and 3 to 36 MeV at the NIF. These measurements have been used to diagnose the performance of cryogenic target implosions to unprecedented accuracy. Interpretation of MRS data requires a detailed understanding of the MRS response and background. This paper describes ab initio characterization of the system involving Monte Carlo simulations of the MRS response in addition to the commission experiments for in situ calibration of the systems on OMEGA and the NIF.

Research Organization:
Massachusetts Institute of Technology (MIT), Cambridge, MA (United States). High Energy Density Physics Div., Plasma Science and Fusion Center
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0002035
OSTI ID:
1172369
Journal Information:
Review of Scientific Instruments, Vol. 84, Issue 4; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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Cited By (15)

Inertial-confinement fusion with lasers journal May 2016
Tripled yield in direct-drive laser fusion through statistical modelling journal January 2019
Measurements of collective fuel velocities in deuterium-tritium exploding pusher and cryogenically layered deuterium-tritium implosions on the NIF journal April 2013
Review of the National Ignition Campaign 2009-2012 journal February 2014
Development of the CD Symcap platform to study gas-shell mix in implosions at the National Ignition Facility journal September 2014
Investigation of ion kinetic effects in direct-drive exploding-pusher implosions at the NIF journal December 2014
Using multiple secondary fusion products to evaluate fuel ρR, electron temperature, and mix in deuterium-filled implosions at the NIF journal August 2015
A neutron activation spectrometer and neutronic experimental platform for the National Ignition Facility (invited) journal September 2016
Optimization of a high-yield, low-areal-density fusion product source at the National Ignition Facility with applications in nucleosynthesis experiments journal May 2018
Synthetic nuclear diagnostics for inferring plasma properties of inertial confinement fusion implosions journal December 2018
Measurement of apparent ion temperature using the magnetic recoil spectrometer at the OMEGA laser facility journal October 2018
Implementation of the foil-on-hohlraum technique for the magnetic recoil spectrometer for time-resolved neutron measurements at the National Ignition Facility journal November 2018
Impact of imposed mode 2 laser drive asymmetry on inertial confinement fusion implosions journal January 2019
First demonstration of ARC-accelerated proton beams at the National Ignition Facility journal April 2019
Dynamic high energy density plasma environments at the National Ignition Facility for nuclear science research journal February 2018

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