Flux coordinates: Difference between revisions

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+ \tilde{\eta}(\psi,\theta,\phi)~.
+ \tilde{\eta}(\psi,\theta,\phi)~.
</math>
</math>
Note that the poloidal current is now defined through a ribbon and not a disc.
Note that the poloidal current is now defined through a ribbon and not a disc. The two currents are related as <math>\nabla\mathbf{j} = 0</math> implies
:<math>
I_{pol} + I_{pol}^d = \oint_{\psi=0}\mathbf{B}\cdot d\mathbf{l}~,
</math>
where the integral is performed along the magnetic axis.


== Magnetic coordinates ==
== Magnetic coordinates ==
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