Publication Date:
2016-01-23
Description:
Fusion ignition experiments on the National Ignition Facility have demonstrated 〉5 keV hot spot with ρ R h lower than 0.3 g/cm 2 [Döppner et al. , Phys. Rev. Lett. 115 , 055001 (2015)]. We present an ion-electron non-equilibrium model, in which the hot-spot ion temperature is higher than its electron temperature so that the hot-spot nuclear reactions are enhanced while energy leaks are considerably reduced. Theoretical analysis shows that the ignition region would be significantly enlarged in the hot-spot ρR-T space as compared with the commonly used equilibrium model. Simulations show that shocks could be utilized to create and maintain non-equilibrium conditions within the hot spot, and the hot-spot ρR requirement is remarkably reduced for achieving self-heating.
Print ISSN:
1070-664X
Electronic ISSN:
1089-7674
Topics:
Physics
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