4,427
edits
No edit summary |
No edit summary |
||
Line 31: | Line 31: | ||
where <math>\bar r</math> is the average radius of a flux surface. | where <math>\bar r</math> is the average radius of a flux surface. | ||
A positive gradient of ''w'' corresponds to a magnetic well, and a negative gradient to a magnetic hill. | A positive gradient of ''w'' corresponds to a magnetic well (stable), and a negative gradient to a magnetic hill (unstable). | ||
== References == | == References == | ||
<references /> | <references /> |