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01903 am a22002773u 4500 |
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|a Forrest, C. J.
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|a Gatu Johnson, Maria
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|a Radha, P. B.
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|a Knauer, J. P.
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|a Glebov, V. Yu.
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|a Goncharov, V. N.
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|a Regan, S. P.
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|a Rosenberg, M. J.
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|a Sangster, T. C.
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|a Shmayda, W. T.
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|a Stoeckl, C.
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|a Gatu Johnson, Maria
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|a First Measurements of Deuterium-Tritium and Deuterium-Deuterium Fusion Reaction Yields in Ignition-Scalable Direct-Drive Implosions
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|b American Physical Society,
|c 2017-03-07T15:27:18Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/107203
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|a 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.
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|a en
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|a Article
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|t Physical Review Letters
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