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

doi:10.1088/1674-1056/26/7/075202

中国物理B ›› 2017, Vol. 26 ›› Issue (7): 75202-075202.doi: 10.1088/1674-1056/26/7/075202

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇下一篇

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

Xue Yang(杨学), De-Long Xiao(肖德龙), Ning Ding(丁宁), Jie Liu(刘杰)

1 Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
2 Graduate School, China Academy of Engineering Physics, Beijing 100088, China;
3 HEDPS, CAPT, and CICIFSA MoE, Peking University, Beijing 100871, China

收稿日期:2017-01-17 修回日期:2017-04-07 出版日期:2017-07-05 发布日期:2017-07-05
通讯作者: De-Long Xiao E-mail:xiao_delong@iapcm.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos.11475027,11274051,11105017,and 11275030) and the National Basic Research Program of China (Grants No.2013CB834100).

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

Xue Yang(杨学)^1,2, De-Long Xiao(肖德龙)¹, Ning Ding(丁宁)¹, Jie Liu(刘杰)^1,3

1 Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
2 Graduate School, China Academy of Engineering Physics, Beijing 100088, China;
3 HEDPS, CAPT, and CICIFSA MoE, Peking University, Beijing 100871, China

Received:2017-01-17 Revised:2017-04-07 Online:2017-07-05 Published:2017-07-05
Contact: De-Long Xiao E-mail:xiao_delong@iapcm.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos.11475027,11274051,11105017,and 11275030) and the National Basic Research Program of China (Grants No.2013CB834100).

摘要/Abstract

摘要： In this paper, the characteristics of magneto-Rayleigh–Taylor (MRT) instability of liner plasmas in MagLIF 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 (MagLIF), Z-pinch, compressibility

Abstract: In this paper, the characteristics of magneto-Rayleigh–Taylor (MRT) instability of liner plasmas in MagLIF 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.

Key words: magneto-Rayleigh–Taylor (MRT) instability, magnetized liner inertial fusion (MagLIF), Z-pinch, compressibility

中图分类号: (Implosion symmetry and hydrodynamic instability (Rayleigh-Taylor, Richtmyer-Meshkov, imprint, etc.))

52.57.Fg

52.55.Tn (Ideal and resistive MHD modes; kinetic modes) 52.58.Lq (Z-pinches, plasma focus, and other pinch devices)

杨学, 肖德龙, 丁宁, 刘杰. Magneto-Rayleigh–Taylor instability in compressible Z-pinch liner plasmas[J]. 中国物理B, 2017, 26(7): 75202-075202.

Xue Yang(杨学), De-Long Xiao(肖德龙), Ning Ding(丁宁), Jie Liu(刘杰). Magneto-Rayleigh–Taylor instability in compressible Z-pinch liner plasmas[J]. Chin. Phys. B, 2017, 26(7): 75202-075202.

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

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

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