Destruction of Invariant Surfaces and Magnetic Coordinates for Perturbed Magnetic Fields.

Hudson, S. R.

Technical Information Center Oak Ridge Tennessee

关键词: Magnetic fields;    Coordinates;    Rotational transform;    Magnetic surfaces;   

RP-ID  :  DE2004820204

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Straight-field-line coordinates are constructed for nearly integrable magnetic fields. The coordinates are based on the robust, noble-irrational rotational-transform surfaces, whose existence is determined by an application of Greene's residue criterion. A simple method to locate these surfaces is described. Sequences of surfaces with rotational-transform converging to low order rationals maximize the region of straight-field-line coordinates.