Species separation and kinetic effects in collisional plasma shocks

被引：49
作者：
Bellei, C. [1 ]
Rinderknecht, H. [2 ]
Zylstra, A. [2 ]
Rosenberg, M. [2 ]
Sio, H. [2 ]
Li, C. K. [2 ]
Petrasso, R. [2 ]
Wilks, S. C. [1 ]
Amendt, P. A. [1 ]
机构：
[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[2] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
来源：
PHYSICS OF PLASMAS | 2014年 / 21卷 / 05期
关键词：
SIMULATIONS; WAVE;
D O I：
10.1063/1.4876614
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The properties of collisional shock waves propagating in uniform plasmas are studied with ion-kinetic calculations, in both slab and spherical geometry and for the case of one and two ion species. Despite the presence of an electric field at the shock front-and in contrast to the case where an interface is initially present [C. Bellei et al., Phys. Plasmas 20, 044702 (2013)]-essentially no ion reflection at the shock front is observed due to collisions, with a probability of reflection less than or similar to 10(-4) for the cases presented. A kinetic two-ion-species spherical convergent shock is studied in detail and compared against an average-species calculation, confirming effects of species separation and differential heating of the ion species at the shock front. The effect of different ion temperatures on the DT and (DHe)-He-3 fusion reactivity is discussed in the fluid limit and is estimated to be moderately important. (C) 2014 AIP Publishing LLC.
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页数：11
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