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Rotational transform: Difference between revisions
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where ''φ'' and ''θ'' are the [[Toroidal coordinates|toroidal and poloidal angles]], respectively. | where ''φ'' and ''θ'' are the [[Toroidal coordinates|toroidal and poloidal angles]], respectively. | ||
Thus ''q = dφ/dθ'' can be approximated by | Thus ''q = m/n = dφ/dθ'' can be approximated by | ||
:<math>q = \frac{r B_\phi}{R B_\theta}</math> | :<math>q = \frac{r B_\phi}{R B_\theta}</math> | ||