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

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

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.

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

Received: 17 January 2017
Revised: 07 April 2017
Accepted manuscript online:

PACS:	52.57.Fg	(Implosion symmetry and hydrodynamic instability (Rayleigh-Taylor, Richtmyer-Meshkov, imprint, etc.))
	52.55.Tn	(Ideal and resistive MHD modes; kinetic modes)
	52.58.Lq	(Z-pinches, plasma focus, and other pinch devices)

Fund: 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).

Corresponding Authors: De-Long Xiao
E-mail: xiao_delong@iapcm.ac.cn

Cite this article:

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 2017 Chin. Phys. B 26 075202

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

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