Probing ion species separation and ion thermal decoupling in shock-driven implosions using multiple nuclear reaction histories

Sio, H.; Larroche, O.; Atzeni, S.; Kabadi, N. V.; Frenje, J. A.; Gatu Johnson, M.; Stoeckl, C.; Li, C. K.; Forrest, C. J.; Glebov, V.; Adrian, P. J.; Bose, A.; Birkel, A.; Regan, S. P.; Seguin, F. H.; Petrasso, R. D.

doi:10.1063/1.5097605

Title: Probing ion species separation and ion thermal decoupling in shock-driven implosions using multiple nuclear reaction histories

Journal Article · Mon Jul 29 00:00:00 EDT 2019 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5097605· OSTI ID:1614443

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^[3]; Kabadi, N. V. ^[1];

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^[1]; Stoeckl, C. ^[4]; Li, C. K. ^[1]; Forrest, C. J. ^[4]; Glebov, V. ^[4];

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^[1]; Regan, S. P. ^[4]; Seguin, F. H. ^[1];

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Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France). DAM Ile-de-France (DIF)
Univ. degli Studi di Roma “La Sapienza,” Roma (Italy)
Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Simultaneously measured DD, DT, and D³He reaction histories are used to probe the impacts of multi-ion physics during the shock phase of inertial confinement fusion implosions. In these relatively hydrodynamiclike (burn-averaged Knudsen number ⟨N_K⟩ ~0.3) shock-driven implosions, average-ion hydrodynamic DUED simulations are able to reasonably match burnwidths, nuclear yields, and ion temperatures. However, kinetic-ion FPION simulations are able to better simulate the timing differences and time-resolved reaction rate ratios between DD, DT, and D³He reactions. FPION simulations suggest that the D³He/DT reaction rate ratio is most directly impacted by ion species separation between the ³He and T ions, whereas the D³He/DD reaction rate ratio is affected by both ion species separation and ion temperature decoupling effects.

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Research Organization:: Krell Institute, Ames, IA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Ohio Univ., Athens, OH (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: FC52-08NA28752; NA0001857; NA0002035; NA0002905; NA0002949

OSTI ID:: 1614443

Alternate ID(s):: OSTI ID: 1545415

Journal Information:: Physics of Plasmas, Vol. 26, Issue 7; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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