Numerical study on magneto-Rayleigh-Taylor instabilities for thin liner implosions on the primary test stand facility

doi:10.1088/1674-1056/28/3/035201

Abstract

The thin aluminum liners with an aspect ratio R/Δr<<1 have been imploded on the primary test stand (PTS) facility, where R is the outer radius of the liner and Δr is the thickness. The x-ray self-emission images present azimuthally correlated perturbations in the liner implosions. The experiments show that at -10 ns before the stagnation, the wavelengths of perturbation are about 0.93 mm and 1.67 mm for the small-radius and large-radius liners, respectively. We have utilized the resistive magnetohydrodynamic code PLUTO to study the development of magneto-Rayleigh-Taylor (MRT) instabilities under experimental conditions. The calculated perturbation amplitudes are consistent with the experimental observations very well. We have found that both mode coupling and long implosion distance are responsible for the more developed instabilities in the large-radius liner implosions.

Keywords: thin liner implosion Z-pinches magnetohydrodynamic (MHD) primary test stand (PTS) magneto-Rayleigh-Taylor instability

Received: 08 October 2018
Revised: 07 January 2019
Accepted manuscript online:

PACS:	52.30.Cv	(Magnetohydrodynamics (including electron magnetohydrodynamics))
	52.35.-g	(Waves, oscillations, and instabilities in plasmas and intense beams)
	52.58.Lq	(Z-pinches, plasma focus, and other pinch devices)
	52.65.Kj	(Magnetohydrodynamic and fluid equation)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 11605013, 11775032, 11805019, and 11705013).

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

Cite this article:

Xiao-Guang Wang(王小光), Shun-Kai Sun(孙顺凯), De-Long Xiao(肖德龙), Guan-Qiong Wang(王冠琼), Yang Zhang(张扬), Shao-Tong Zhou(周少彤), Xiao-Dong Ren(任晓东), Qiang Xu(徐强), Xian-Bin Huang(黄显宾), Ning Ding(丁宁), Xiao-Jian Shu(束小建) Numerical study on magneto-Rayleigh-Taylor instabilities for thin liner implosions on the primary test stand facility 2019 Chin. Phys. B 28 035201

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Numerical study on magneto-Rayleigh-Taylor instabilities for thin liner implosions on the primary test stand facility

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