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Magnetic well: Difference between revisions
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:<math>w(\bar r) = \frac{(dV(0)/d\Phi - dV(\bar r)/d\Phi)}{dV(0)/d\Phi }</math> | :<math>w(\bar r) = \frac{(dV(0)/d\Phi - dV(\bar r)/d\Phi)}{dV(0)/d\Phi }</math> | ||
where <math>\bar r</math> is the average radius of a flux surface. | where <math>\bar r</math> is the [[Effective plasma radius|average radius of a flux surface]]. | ||
A positive gradient of ''w'' corresponds to a magnetic well (stable), and a negative gradient to a magnetic hill (unstable). | A positive gradient of ''w'' corresponds to a magnetic well (stable), and a negative gradient to a magnetic hill (unstable). | ||
== References == | == References == | ||
<references /> | <references /> | ||