4,427
edits
Rotational transform: Difference between revisions
→Safety factor
No edit summary |
|||
| Line 19: | Line 19: | ||
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 = m/n = dφ/dθ'' can be approximated by | Thus ''q = m/n = <dφ/dθ>'' can be approximated by | ||
:<math>q \simeq \frac{r B_\phi}{R B_\theta}</math> | :<math>q \simeq \frac{r B_\phi}{R B_\theta}</math> | ||