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

Johnson, M. Gatu; Frenje, J. A.; LI, C. K.; Seguin, 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

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

Journal Article · Fri Jul 11 00:00:00 EDT 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4886418· OSTI ID:1894557

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

Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
University of Rochester, NY (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
General Atomics, San Diego, CA (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/cm² and CH-ablator ρR's of 400–680 mg/cm² 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.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

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

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

OSTI ID:: 1894557

Alternate ID(s):: OSTI ID: 1557850

Report Number(s):: LLNL-JRNL-841390; 1061197; TRN: US2310428

Journal Information:: Review of Scientific Instruments, Vol. 85, Issue no. 11; ISSN 0034-6748

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

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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References (11)

Probing high areal-density cryogenic deuterium-tritium implosions using downscattered neutron spectra measured by the magnetic recoil spectrometer Frenje, J. A.; Casey, D. T.; Li, C. K. Physics of Plasmas, Vol. 17, Issue 5 https://doi.org/10.1063/1.3304475	journal	May 2010
First measurements of the absolute neutron spectrum using the magnetic recoil spectrometer at OMEGA (invited) Frenje, J. A.; Casey, D. T.; Li, C. K. Review of Scientific Instruments, Vol. 79, Issue 10 https://doi.org/10.1063/1.2956837	journal	October 2008
Neutron spectrometry—An essential tool for diagnosing implosions at the National Ignition Facility (invited) Johnson, M. Gatu; Frenje, J. A.; Casey, D. T. Review of Scientific Instruments, Vol. 83, Issue 10 https://doi.org/10.1063/1.4728095	journal	October 2012
Multi-shot analysis of the gamma reaction history diagnostic Sayre, D. B.; Bernstein, L. A.; Church, J. A. Review of Scientific Instruments, Vol. 83, Issue 10 https://doi.org/10.1063/1.4729492	journal	October 2012
Relativistic calculation of fusion product spectra for thermonuclear plasmas Ballabio, L.; Källne, J.; Gorini, G. Nuclear Fusion, Vol. 38, Issue 11 https://doi.org/10.1088/0029-5515/38/11/310	journal	November 1998
A neutron spectrometer for precise measurements of DT neutrons from 10 to 18 MeV at OMEGA and the National Ignition Facility Frenje, J. A.; Green, K. M.; Hicks, D. G. Review of Scientific Instruments, Vol. 72, Issue 1 https://doi.org/10.1063/1.1323243	journal	January 2001
Absolute measurements of neutron yields from DD and DT implosions at the OMEGA laser facility using CR-39 track detectors Frenje, J. A.; Li, C. K.; Séguin, F. H. Review of Scientific Instruments, Vol. 73, Issue 7 https://doi.org/10.1063/1.1487889	journal	July 2002
The coincidence counting technique for orders of magnitude background reduction in data obtained with the magnetic recoil spectrometer at OMEGA and the NIF Casey, D. T.; Frenje, J. A.; Séguin, F. H. Review of Scientific Instruments, Vol. 82, Issue 7 https://doi.org/10.1063/1.3605483	journal	July 2011
The magnetic recoil spectrometer for measurements of the absolute neutron spectrum at OMEGA and the NIF Casey, D. T.; Frenje, J. A.; Gatu Johnson, M. Review of Scientific Instruments, Vol. 84, Issue 4 https://doi.org/10.1063/1.4796042	journal	April 2013
Measurement of the $T + T$ Neutron Spectrum Using the National Ignition Facility Sayre, D. B.; Brune, C. R.; Caggiano, J. A. Physical Review Letters, Vol. 111, Issue 5 https://doi.org/10.1103/PhysRevLett.111.052501	journal	August 2013
Measurements of the Differential Cross Sections for the Elastic $n − {}^{3}H$ and $n − {}^{2}H$ Scattering at 14.1 MeV by Using an Inertial Confinement Fusion Facility Frenje, J. A.; Li, C. K.; Seguin, F. H. Physical Review Letters, Vol. 107, Issue 12 https://doi.org/10.1103/PhysRevLett.107.122502	journal	September 2011

Cited By (3)

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
Gamma Reaction History ablator areal density constraints upon correlated diagnostic modeling of National Ignition Facility implosion experiments Cerjan, C.; Sayre, D. B.; Landen, O. L. Physics of Plasmas, Vol. 22, Issue 3 https://doi.org/10.1063/1.4916124	journal	March 2015

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