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Title: High-resolution measurements of the DT neutron spectrum using new CD foils in the Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility

The Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility measures the DT neutron spectrum from cryogenically layered inertial confinement fusion implosions. Yield, areal density, apparent ion temperature, and directional fluid flow are inferred from the MRS data. Here, this paper describes recent advances in MRS measurements of the primary peak using new, thinner, reduced-area deuterated plastic (CD) conversion foils. The new foils allow operation of MRS at yields 2 orders of magnitude higher than previously possible, at a resolution down to ~200 keV FWHM.
Authors:
 [1] ; ORCiD logo [1] ;  [2] ;  [2] ;  [2] ; ORCiD logo [3] ;  [2] ; ORCiD logo [2] ;  [2] ;  [3] ;  [3] ;  [1] ; ORCiD logo [1] ; ORCiD logo [3] ;  [2] ;  [3] ;  [1] ;  [2] ; ORCiD logo [2]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. General Atomics, San Diego, CA (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-745982
Journal ID: ISSN 0034-6748; RSINAK
Grant/Contract Number:
AC52-07NA27344; NA0001857; NA0001808
Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 11; Conference: 21. Topical Conference on High Temperature Plasma Diagnostics (HTPD 2016), Madison, WI (United States), 5-9 Jun 2016; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Research Org:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center, High Energy Density Physics Div.; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Neutrons; Magnetoresistance; Lasers
OSTI Identifier:
1312738
Alternate Identifier(s):
OSTI ID: 1466960

Gatu Johnson, M., Frenje, J. A., Bionta, R. M., Casey, D. T., Eckart, M. J., Farrell, M. P., Grim, G. P., Hartouni, E. P., Hatarik, R., Hoppe, M., Kilkenny, J. D., Li, C. K., Petrasso, R. D., Reynolds, H. G., Sayre, D. B., Schoff, M. E., Séguin, F. H., Skulina, K., and Yeamans, C. B.. High-resolution measurements of the DT neutron spectrum using new CD foils in the Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility. United States: N. p., Web. doi:10.1063/1.4959946.
Gatu Johnson, M., Frenje, J. A., Bionta, R. M., Casey, D. T., Eckart, M. J., Farrell, M. P., Grim, G. P., Hartouni, E. P., Hatarik, R., Hoppe, M., Kilkenny, J. D., Li, C. K., Petrasso, R. D., Reynolds, H. G., Sayre, D. B., Schoff, M. E., Séguin, F. H., Skulina, K., & Yeamans, C. B.. High-resolution measurements of the DT neutron spectrum using new CD foils in the Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility. United States. doi:10.1063/1.4959946.
Gatu Johnson, M., Frenje, J. A., Bionta, R. M., Casey, D. T., Eckart, M. J., Farrell, M. P., Grim, G. P., Hartouni, E. P., Hatarik, R., Hoppe, M., Kilkenny, J. D., Li, C. K., Petrasso, R. D., Reynolds, H. G., Sayre, D. B., Schoff, M. E., Séguin, F. H., Skulina, K., and Yeamans, C. B.. 2016. "High-resolution measurements of the DT neutron spectrum using new CD foils in the Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility". United States. doi:10.1063/1.4959946. https://www.osti.gov/servlets/purl/1312738.
@article{osti_1312738,
title = {High-resolution measurements of the DT neutron spectrum using new CD foils in the Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility},
author = {Gatu Johnson, M. and Frenje, J. A. and Bionta, R. M. and Casey, D. T. and Eckart, M. J. and Farrell, M. P. and Grim, G. P. and Hartouni, E. P. and Hatarik, R. and Hoppe, M. and Kilkenny, J. D. and Li, C. K. and Petrasso, R. D. and Reynolds, H. G. and Sayre, D. B. and Schoff, M. E. and Séguin, F. H. and Skulina, K. and Yeamans, C. B.},
abstractNote = {The Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility measures the DT neutron spectrum from cryogenically layered inertial confinement fusion implosions. Yield, areal density, apparent ion temperature, and directional fluid flow are inferred from the MRS data. Here, this paper describes recent advances in MRS measurements of the primary peak using new, thinner, reduced-area deuterated plastic (CD) conversion foils. The new foils allow operation of MRS at yields 2 orders of magnitude higher than previously possible, at a resolution down to ~200 keV FWHM.},
doi = {10.1063/1.4959946},
journal = {Review of Scientific Instruments},
number = 11,
volume = 87,
place = {United States},
year = {2016},
month = {8}
}