Fuel–shell mix and yield degradation in kinetic shock-driven inertial confinement fusion implosions

Sio, Hong; Larroche, Olivier; Bose, Arijit; Atzeni, Stefano; Frenje, Johan A.; Kabadi, Neel V.; Gatu Johnson, Maria; Li, Chikang K.; Glebov, Vladimir; Stoeckl, Christian; Lahmann, Brandon; Adrian, Patrick J.; Regan, Sean P.; Birkel, Andrew; Seguin, F. H.; Petrasso, Richard D.

doi:10.1063/5.0087905

Title: Fuel–shell mix and yield degradation in kinetic shock-driven inertial confinement fusion implosions

Journal Article · Wed Jul 20 00:00:00 EDT 2022 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0087905· OSTI ID:1883006

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Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France); Univ. Paris-Saclay, Bruyères-le-Châtel (France)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Univ. of Rome (Italy)
Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Fuel–shell mix in kinetic plasma conditions is probed using nuclear and x-ray self-emission in shock-driven, D³He-gas-filled inertial confinement fusion implosions. As initial gas fill density decreases, measured nuclear yields and ion temperatures are lower than expected as compared to radiation-hydrodynamic simulations. Spatially and temporally resolved x-ray emissions indicate significant mixing at the fuel–shell interface in implosions with low initial gas fill density. In conclusion, this observed fuel–shell mix introduces a substantial amount of shell ions into the center of the implosion prior to and during shock flash and is the key mechanism needed in the kinetic-ion simulations to match experimental nuclear yields.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); National Laser Users' Facility; European Union (EU)

Grant/Contract Number:: AC52-07NA27344; NA0001857; NA0002949; NA0002905; NA0003868; NA0002035; FC52–08NA28752; 101052200; FC52- 08NA28752

OSTI ID:: 1883006

Alternate ID(s):: OSTI ID: 1876946

Report Number(s):: LLNL-JRNL-807757; 1012996; TRN: US2307957

Journal Information:: Physics of Plasmas, Vol. 29, Issue 7; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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