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  • Received: Jan. 29, 2019

    Accepted: May. 22, 2019

    Posted: Nov. 14, 2019

    Published Online: Nov. 8, 2019

    The Author Email: Sio Hong (hsio@mit.edu)

    DOI: 10.1063/1.5090783

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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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Matter and Radiation at Extremes, Vol. 4, Issue 5, 055401 (2019)

Fuel-ion diffusion in shock-driven inertial confinement fusion implosions

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

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.