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Connection length: Difference between revisions
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== Closed field lines == | == Closed field lines == | ||
In a toroidally confined plasma, inside the [[ | In a toroidally confined plasma, inside the [[Flux surface|Last Closed Flux Surface]], the connection length | ||
is commonly defined as the length, measured along the magnetic field, | is commonly defined as the length, measured along the magnetic field, | ||
to complete a poloidal turn. | to complete a poloidal turn. | ||
In a circular [[ | In a circular [[tokamak]], the [[Toroidal coordinates|poloidal circumference]] is ''2πr''. | ||
The connection length is ''L = 2πr/sin(α)'', | The connection length is ''L = 2πr/sin(α)'', | ||
where ''α'' is the pitch angle of the field line, namely | where ''α'' is the pitch angle of the field line, namely | ||