Charged-particle motion in electromagnetic fields having at least one ignorable spatial coordinate.

被引：112

作者：

Jones, FC

Jokipii, JR

Baring, MG

机构：

[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[2] Univ Arizona, Tucson, AZ 85721 USA

来源：

ASTROPHYSICAL JOURNAL | 1998年 / 509卷 / 01期

关键词：

acceleration of particles; cosmic rays; methods : analytical; MHD;

D O I：

10.1086/306480

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We give a rigorous derivation of a theorem showing that charged particles in an arbitrary electromagnetic field with at least one ignorable spatial coordinate remain forever tied to a given magnetic field line. Such a situation contrasts with the significant motions normal to the magnetic field that are expected in most real three-dimensional systems. It is pointed out that while the significance of the theorem has not been widely appreciated, it has important consequences for a number of problems and is of particular relevance for the acceleration of cosmic rays by shocks.

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页码：238 / 243

页数：6

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