Ignition calculations using a reduced coupled-mode electron- ion energy exchange model*

8th International Conference on Inertial Fusion Sciences and Applications

Garbett, W.J.^1 ; Chapman, D.A.^1

AWE Plc, RG7 4PR, Aldermaston, Reading, Berkshire, United Kingdom^1

关键词: Binary collision models;    Binary collision theory;    Coupled mode;    Electron ions;    Fuel assembly;    Impact ignition;    Large deviations;    Numerical results;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012019/pdf
DOI  :  10.1088/1742-6596/688/1/012019

来源: IOP

【 摘 要 】

Coupled-mode models for electron-ion energy exchange can predict large deviations from standard binary collision models in some regimes. A recently developed reduced coupled-mode model for electron-ion energy exchange, which accurately reproduces full numerical results over a wide range of density and temperature space, has been implemented in the Nym hydrocode and used to assess the impact on ICF capsule fuel assembly and performance. Simulations show a lack of sensitivity to the model, consistent with results from a range of simpler alternative models. Since the coupled-mode model is conceptually distinct to models based on binary collision theory, this result provides increased confidence that uncertainty in electron-ion energy exchange will not impact ignition attempts.