中国物理B ›› 2019, Vol. 28 ›› Issue (3): 35201-035201.doi: 10.1088/1674-1056/28/3/035201

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

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

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)   

  1. 1 Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
    2 Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, China
  • 收稿日期:2018-10-08 修回日期:2019-01-07 出版日期:2019-03-05 发布日期:2019-03-05
  • 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. 11605013, 11775032, 11805019, and 11705013).

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

Xiao-Guang Wang(王小光)1, Shun-Kai Sun(孙顺凯)1, De-Long Xiao(肖德龙)1, Guan-Qiong Wang(王冠琼)1, Yang Zhang(张扬)1, Shao-Tong Zhou(周少彤)2, Xiao-Dong Ren(任晓东)2, Qiang Xu(徐强)2, Xian-Bin Huang(黄显宾)2, Ning Ding(丁宁)1, Xiao-Jian Shu(束小建)1   

  1. 1 Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
    2 Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, China
  • Received:2018-10-08 Revised:2019-01-07 Online:2019-03-05 Published:2019-03-05
  • 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. 11605013, 11775032, 11805019, and 11705013).

摘要:

The thin aluminum liners with an aspect ratio Rr<<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.

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

Abstract:

The thin aluminum liners with an aspect ratio Rr<<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.

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

中图分类号:  (Magnetohydrodynamics (including electron magnetohydrodynamics))

  • 52.30.Cv
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)