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Effective plasma radius: Difference between revisions
→Based on flux surfaces
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where ''ψ<sub>N</sub>'' is the normalized poloidal flux, such that it is 0 on the magnetic axis and 1 at the Last Closed Flux Surface (LCFS). | where ''ψ<sub>N</sub>'' is the normalized poloidal flux, such that it is 0 on the magnetic axis and 1 at the Last Closed Flux Surface (LCFS). | ||
Other definitions can be based on the volume ''V(ψ)'' enclosed in a flux surface, or the surface area ''S(ψ)'' of a flux surface. | Other definitions can be based on the volume ''V(ψ)'' enclosed in a flux surface | ||
(using ''V'' = 2 π<sup>2</sup>''Rr''<sub>eff</sub><sup>2</sup>), or the surface area ''S(ψ)'' of a flux surface | |||
(using ''S'' = 4 π<sup>2</sup>''Rr''<sub>eff</sub>). | |||
Here, ''R'' is the major radius of the [[:Wikipedia:Torus|toroid]]. | |||
== Based on field lines == | == Based on field lines == | ||