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Toroidal coordinates: Difference between revisions
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→Simple toroidal coordinates
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* ''R'' = ''R<sub>0</sub>'' + ''r'' cos ''θ'', and | * ''R'' = ''R<sub>0</sub>'' + ''r'' cos ''θ'', and | ||
* ''Z'' = ''r'' sin ''θ'' | * ''Z'' = ''r'' sin ''θ'' | ||
''R<sub>0</sub>'' corresponds to the torus axis and is called the ''major radius'', while ''r'' is called the ''minor radius'', and ''θ'' the ''poloidal angle''. | ''R<sub>0</sub>'' corresponds to the torus axis and is called the ''major radius'', while ''0 ≤ r ≤ a'' is called the ''minor radius'', and ''θ'' the ''poloidal angle''. | ||
The ratio ''R<sub>0</sub>/a'' is called the ''aspect ratio'' of the torus. | |||
In order to adapt this simple system better to the [[Flux surface|magnetic surfaces]] of an axisymmetric [[MHD equilibrium]], it may be enhanced by | In order to adapt this simple system better to the [[Flux surface|magnetic surfaces]] of an axisymmetric [[MHD equilibrium]], it may be enhanced by | ||