Measurements of fuel and ablator ρR in Symmetry-Capsule implosions with the Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility

Frenje, J. A.; Li, C. K.; Séguin, F. H.; Petrasso, R. D.; Bionta, R. M.; Casey, D. T.; Caggiano, J. A.; Hatarik, R.; Khater, H. Y.; Sayre, D. B.; Knauer, J. P.; Sangster, T. C.; Herrmann, H. W.; Kilkenny, J. D.

doi:10.1063/1.4886418

Measurements of fuel and ablator ρR in Symmetry-Capsule implosions with the Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility

Journal Article · Sat Nov 15 04:00:00 EST 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4886418· OSTI ID:22308797

Frenje, J. A.; Li, C. K.; Séguin, F. H.; Petrasso, R. D. ^[1]; Bionta, R. M.; Casey, D. T.; Caggiano, J. A.; Hatarik, R.; Khater, H. Y.; Sayre, D. B. ^[2]; Knauer, J. P.; Sangster, T. C. ^[3]; Herrmann, H. W. ^[4]; Kilkenny, J. D. ^[5]

Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)
Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
General Atomics, San Diego, California 92186 (United States)

The Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility (NIF) measures the neutron spectrum in the energy range of 4–20 MeV. This paper describes MRS measurements of DT-fuel and CH-ablator ρR in DT gas-filled symmetry-capsule implosions at the NIF. DT-fuel ρR's of 80–140 mg/cm{sup 2} and CH-ablator ρR's of 400–680 mg/cm{sup 2} are inferred from MRS data. The measurements were facilitated by an improved correction of neutron-induced background in the low-energy part of the MRS spectrum. This work demonstrates the accurate utilization of the complete MRS-measured neutron spectrum for diagnosing NIF DT implosions.

OSTI ID:: 22308797

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 11 Vol. 85; ISSN 0034-6748; ISSN RSINAK

Country of Publication:: United States

Language:: English

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Dynamic high energy density plasma environments at the National Ignition Facility for nuclear science research Cerjan, Ch J.; Bernstein, L.; Hopkins, L. Berzak Journal of Physics G: Nuclear and Particle Physics, Vol. 45, Issue 3 https://doi.org/10.1088/1361-6471/aa8693	journal	February 2018
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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Measurements of fuel and ablator ρR in Symmetry-Capsule implosions with the Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility

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