Experimental Evidence for a Transient Tayler Instability in a Cylindrical Liquid-Metal Column

被引：83

作者：

Seilmayer, Martin ^{[1
]}

Stefani, Frank ^{[1
]}

Gundrum, Thomas ^{[1
]}

Weier, Tom ^{[1
]}

Gerbeth, Gunter ^{[1
]}

机构：

[1] Helmholtz Zentrum Dresden Rossendorf, D-01314 Dresden, Germany

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 24期

关键词：

MAGNETIC-FIELDS; SPACED DATA; DYNAMO;

D O I：

10.1103/PhysRevLett.108.244501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In the current-driven, kink-type Tayler instability (TI) a sufficiently strong azimuthal magnetic field becomes unstable against nonaxisymmetric perturbations. The TI has been discussed as a possible ingredient of the solar dynamo mechanism and a source of the helical structures in cosmic jets. It is also considered as a size-limiting factor for liquid metal batteries. We report on a liquid metal TI experiment using a cylindrical column of the eutectic alloy GaInSn to which electrical currents of up to 8 kA are applied. We present results of external magnetic field measurements that indicate the transient occurrence of the TI in good agreement with numerical predictions. The interference of TI with the competing large-scale convection, resulting from Joule heating, is also discussed.

引用

页数：4

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