Magneto-Rayleigh-Taylor instability in compressible Z-pinch liner plasmas  

作　　者：杨学 肖德龙 丁宁 刘杰 

机构地区：[1]Institute of Applied Physics and Computational Mathematics [2]Graduate School China Academy of Engineering Physics [3]HEDPS CAPT and CICIFSA MoE Peking University

出　　处：《Chinese Physics B》2017年第7期244-249,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11475027,11274051,11105017,and 11275030);the National Basic Research Program of China(Grants No.2013CB834100)

摘　　要：In this paper, the characteristics of magneto-Rayleigh-Taylor（MRT） instability of liner plasmas in Mag LIF is theoretically investigated. A three-region slab model, based on ideal MHD equations, is used to derive the dispersion relation of MRT instability. The effect of compressibility on the development of MRT instability is specially examined. It is shown that the growth rate of MRT instability in compressible condition is generally lower than that in incompressible condition in the presence of magnetic field. In the case of zero magnetic field, the growth rate in compressible assumption is approximately the same as that in incompressible assumption. Generally, MRT instability in（x, y） plane can be remarkably mitigated due to the presence of magnetic field especially for short-wavelength perturbations. Perturbations may be nearly completely mitigated when the magnetic field is increased to over 1000 T during liner implosions. The feedthrough of MRT instability in liner outer surface on inner surface is also discussed.In this paper, the characteristics of magneto-Rayleigh-Taylor（MRT） instability of liner plasmas in Mag LIF is theoretically investigated. A three-region slab model, based on ideal MHD equations, is used to derive the dispersion relation of MRT instability. The effect of compressibility on the development of MRT instability is specially examined. It is shown that the growth rate of MRT instability in compressible condition is generally lower than that in incompressible condition in the presence of magnetic field. In the case of zero magnetic field, the growth rate in compressible assumption is approximately the same as that in incompressible assumption. Generally, MRT instability in（x, y） plane can be remarkably mitigated due to the presence of magnetic field especially for short-wavelength perturbations. Perturbations may be nearly completely mitigated when the magnetic field is increased to over 1000 T during liner implosions. The feedthrough of MRT instability in liner outer surface on inner surface is also discussed.

关 键 词：magneto-Rayleigh-Taylor（MRT） instability magnetized liner inertial fusion（Mag LIF） Z-PINCH COMPRESSIBILITY 

分 类 号：O53[理学—等离子体物理]