First Measurements of Deuterium-Tritium and Deuterium-Deuterium Fusion Reaction Yields in Ignition-Scalable Direct-Drive Implosions
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PhysRevLett.118.095002.pdf
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Author(s)
Forrest, C. J.
Radha, P. B.
Knauer, J. P.
Glebov, V. Yu.
Goncharov, V. N.
Regan, S. P.
Rosenberg, M. J.
Sangster, T. C.
Shmayda, W. T.
Stoeckl, C.
Date Issued
March 2017
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Forrest, C. J. et al. “First Measurements of Deuterium-Tritium and Deuterium-Deuterium Fusion Reaction Yields in Ignition-Scalable Direct-Drive Implosions.” Physical Review Letters 118.9 (2017): n. pag. © 2017 American Physical Society
Version
Final published version
Abstract
The deuterium-tritium (D-T) and deuterium-deuterium neutron yield ratio in cryogenic inertial confinement fusion (ICF) experiments is used to examine multifluid effects, traditionally not included in ICF modeling. This ratio has been measured for ignition-scalable direct-drive cryogenic DT implosions at the Omega Laser Facility [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] using a high-dynamic-range neutron time-of-flight spectrometer. The experimentally inferred yield ratio is consistent with both the calculated values of the nuclear reaction rates and the measured preshot target-fuel composition. These observations indicate that the physical mechanisms that have been proposed to alter the fuel composition, such as species separation of the hydrogen isotopes [D. T. Casey et al., Phys. Rev. Lett. 108, 075002 (2012)], are not significant during the period of peak neutron production in ignition-scalable cryogenic direct-drive DT implosions.
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.118.095002
