Impeding Hohlraum Plasma Stagnation in Inertial-Confinement Fusion
Author(s)
Li, C. K.; Seguin, Fredrick Hampton; Frenje, Johan A.; Rosenberg, Michael Jonathan; Rinderknecht, Hans George; Zylstra, Alex Bennett; Petrasso, Richard D.; Amendt, P. A.; Landen, O. L.; Mackinnon, A. J.; Town, R. P. J.; Wilks, S. C.; Betti, R.; Meyerhofer, D. D.; Soures, J. M.; ... Show more Show less
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This Letter reports the first time-gated proton radiography of the spatial structure and temporal evolution of how the fill gas compresses the wall blowoff, inhibits plasma jet formation, and impedes plasma stagnation in the hohlraum interior. The potential roles of spontaneously generated electric and magnetic fields in the hohlraum dynamics and capsule implosion are discussed. It is shown that interpenetration of the two materials could result from the classical Rayleigh-Taylor instability occurring as the lighter, decelerating ionized fill gas pushes against the heavier, expanding gold wall blowoff. This experiment showed new observations of the effects of the fill gas on x-ray driven implosions, and an improved understanding of these results could impact the ongoing ignition experiments at the National Ignition Facility.
Date issued
2012-01Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Plasma Science and Fusion CenterJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Li, C. et al. “Impeding Hohlraum Plasma Stagnation in Inertial-Confinement Fusion.” Physical Review Letters 108.2 (2012). © 2012 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114