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. 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.
Fuel–shell mix and yield degradation in kinetic shock-driven inertial confinement fusion implosions / Sio, H.; Larroche, O.; Bose, A.; Atzeni, S.; Frenje, J. A.; Kabadi, N. V.; Gatu Johnson, M.; Li, C. K.; Glebov, V.; Stoeckl, C.; Lahmann, B.; Adrian, P. J.; Regan, S. P.; Birkel, A.; Seguin, F. H.; Petrasso, R. D.. - In: PHYSICS OF PLASMAS. - ISSN 1070-664X. - 29:7(2022). [10.1063/5.0087905]
Fuel–shell mix and yield degradation in kinetic shock-driven inertial confinement fusion implosions
S. Atzeni;
2022
Abstract
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. 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.File | Dimensione | Formato | |
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