Computational investigation of the magneto-Rayleigh-Taylor instability in Z-pinch implosions

被引：6

作者：

Zhang Yang ^{[1
]}

Wu Jiming ^{[1
]}

Dai Zihuan ^{[1
]}

Ding Ning ^{[1
]}

Ning Cheng ^{[1
]}

Yao Yanzhong ^{[1
]}

Xiao Delong ^{[1
]}

Sun Shunkai ^{[1
]}

Gu Tongxiang ^{[1
]}

Cao Yi ^{[1
]}

Huang Jun ^{[1
]}

Xue Chuang ^{[1
]}

Shu Xiaojian ^{[1
]}

机构：

[1] Inst Appl Phys & Computat Math, Beijing 100094, Peoples R China

来源：

PHYSICS OF PLASMAS | 2010年 / 17卷 / 04期

基金：

中国国家自然科学基金;

关键词：

explosions; plasma magnetohydrodynamics; plasma simulation; plasma X-ray sources; Rayleigh-Taylor instability; Z pinch; X-RAY POWER; HEURISTIC MODEL;

D O I：

10.1063/1.3381072

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The instability evolvement induced by single mode and random density seeds have been investigated by using the Magnetics Atom Radiation Electron Dynamics (MARED) code, which is a two dimensional, three temperature, radiation magnetohydrodynamic Lagrangian code developed for the Z-pinch implosion simulation. The instability development during each stage (linear, weak nonlinear, and nonlinear) and its corresponding characteristics are studied with single-mode seeds. The evolvement of the dominant mode and its final wavelength are revealed through the development of seeds composed of modes covering the "whole" spectrum or just a "band-type" range of it. In addition, the relationship between the initial perturbation amplitude and the final x-ray output are also discussed. Through these discussions, the MARED code is found able to reproduce the primary dynamic characteristics of the Z-pinch implosions and the development of the instability qualitatively agrees with the theoretical analyses and experimental observations, which shows us a modest expectation of the broad coverage of the future application.

引用

页数：9

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