Plasma physics effects on thermonuclear burn rate in the presence of hydrodynamic mix

8th International Conference on Inertial Fusion Sciences and Applications

Tang, Xian-Zhu^1 ; Guo, Zehua^1 ; Kagan, Grigory^1 ; McDevitt, Christopher^1 ; Srinivasan, Bhuvana^1

Theoretical Division, Los Alamos National Laboratory, Los Alamos

NM

87545, United States^1

关键词: Applied magnetic fields;    Fast ion transport;    Ion diffusion;    Ion separation;    Physical mechanism;    Plasma physics;    Thermodynamic forces;    Thermonuclear burns;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012123/pdf
DOI  :  10.1088/1742-6596/688/1/012123

来源: IOP

【 摘 要 】

Hydrodynamic mix can significantly degrade thermonuclear burn rate in an inertial confinement fusion (ICF) target. Successful mitigation requires a detailed understanding of the physical mechanisms by which mix affects burn. Here we summarize the roles of three distinct plasma physics effects on burn rate. The first is the well-known effect of enhanced thermal energy loss from the hot spot and the mitigating role of self-generated or externally-applied magnetic field. The second is the fuel ion separation via inter-species ion diffusion driven by the powerful thermodynamic forces exacerbated by mix during the implosion process. The third is the fusion reactivity modification by fast ion transport in a mix-dominated ICF target, where hot plasma is intermingled with cold fuel.