Mass and charge dependence of ion shock coupling and thermal equilibration in ICF shock phase
Abstract
During the shock-convergence phase of ICF implosions there are steep spatial gradients and the ion mean free path becomes long compared to the system size, indicating that multi-ion and kinetic effects may be important. It has been previously indicated that there is substantial thermal decoupling and possibly other kinetic effects in D3He plasmas with conditions relevant to the NIF shock-phase. In this presentation I will show recent work conducted on the Omega laser facility recreating these conditions in DT plasmas. Results indicate a system that is better captured by average-ion hydrodynamic simulations than the D3He case. We are working to understand this behavior. Combined DT and D3He burn averaged observables are consistent with an equilibrating two-temperature model. This has major implications for our understanding of kinetic and multi-ion plasma physics and our modeling of ICF implosions.
This work was supported in part by the U.S. DOE, NLUF and LLE.- Publication:
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APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..DPPNO5014K