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