• Matter and Radiation at Extremes
  • Vol. 4, Issue 5, 055401 (2019)
Hong Sio1、a), Chikang Li1, Cody E. Parker1, Brandon Lahmann1, Ari Le2, Stefano Atzeni3, and Richard D. Petrasso1
Author Affiliations
  • 1Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
  • 2Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 3Dipartimento SBAI, Università degli Studi di Roma “La Sapienza,” Via Antonio Scarpa 14, 00161, Roma, Italy
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    DOI: 10.1063/1.5090783 Cite this Article
    Hong Sio, Chikang Li, Cody E. Parker, Brandon Lahmann, Ari Le, Stefano Atzeni, Richard D. Petrasso. Fuel-ion diffusion in shock-driven inertial confinement fusion implosions[J]. Matter and Radiation at Extremes, 2019, 4(5): 055401 Copy Citation Text show less

    Abstract

    The impact of fuel-ion diffusion in inertial confinement fusion implosions is assessed using nuclear reaction yield ratios and reaction histories. In T3He-gas-filled (with trace D) shock-driven implosions, the observed TT/T3He yield ratio is ~2× lower than expected from temperature scaling. In D3He-gas-filled (with trace T) shock-driven implosions, the timing of the D3He reaction history is ~50 ps earlier than those of the DT reaction histories, and average-ion hydrodynamic simulations cannot reconcile this timing difference. Both experimental observations are consistent with reduced T ions in the burn region as predicted by multi-ion diffusion theory and particle-in-cell simulations.
    D+Tα(3.5 MeV)+n(14.1MeV),(1)

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    D+3Heα(3.6 MeV)+p(14.7MeV),(2)

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    T+Tα(6.6 MeV)+2n(≤10.6MeV),(3)

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    T+3Heα(4.8 MeV)+d(9.5MeV)(BR43%).(4)

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    Tfusion,D3He=mDTi,He3+mHe3Ti,DmD+mHe3,(5)

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    Tfusion,DT=mDTi,T+mTTi,DmD+mT.(6)

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    Y12=f1f21+δ12ni2σv12dVdt,(7)

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    Y11Y1212f1f2σv11σv12.(8)

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    Hong Sio, Chikang Li, Cody E. Parker, Brandon Lahmann, Ari Le, Stefano Atzeni, Richard D. Petrasso. Fuel-ion diffusion in shock-driven inertial confinement fusion implosions[J]. Matter and Radiation at Extremes, 2019, 4(5): 055401
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