Magnetic helicity conservation

被引：0
|
作者：
Berger, Mitchell A. [1 ]
机构：
[1] UCL, London WC1E 6BT, England
来源：
HIGHLIGHTS OF ASTRONOMY, VOL 13 | 2005年 / 13卷
关键词：
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Magnetic Helicity measures basic structural properties of magnetic fields such as twist, shear, linking, writhe, and handedness. It is conserved in ideal MHD and approximately conserved during reconnection. The minimum energy state of a field with a given magnetic helicity is a linear force free field. Helicity plays an important role in MHD turbulence and dynamo theory, and provides a valuable observational tool in solar and space physics. Helicity conservation can be tracked from the solar dynamo to active regions to coronal mass ejections to magnetic clouds in interplanetary space.
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页码：85 / 88
页数：4
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