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Triangularity: Difference between revisions
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(Created page with "The triangularity refers to the shape of the poloidal cross section of the Last Closed Flux surface (LCFS) or separatrix of a tokamak. Assuming: * ''R<sub>0</sub>...") |
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Assuming: | Assuming: | ||
* ''R<sub>0</sub>'' is the major radius of the midpoint of the 2 intersections of the LCFS or separatrix with the equatorial plane (''Z'' = 0). | * ''R<sub>0</sub>'' is the major radius of the midpoint of the 2 intersections of the LCFS or separatrix with the equatorial plane (''Z'' = 0). | ||
* ''a'' is the minor radius of the plasma, defined as the difference | * ''a'' is the minor radius of the plasma, defined as the radial difference between the 2 intersections of the LCFS or separatrix with the equatorial plane (''Z'' = 0), divided by 2. | ||
* ''R<sub>up</sub>'' is the major radius of the upper X-point (in case it exists) or of the highest vertical point of the LCFS. | * ''R<sub>up</sub>'' is the major radius of the upper X-point (in case it exists) or of the highest vertical point of the LCFS. | ||
* ''R<sub>down</sub>'' is the major radius of the lower X-point (in case it exists) or of the lowest vertical point of the LCFS. | * ''R<sub>down</sub>'' is the major radius of the lower X-point (in case it exists) or of the lowest vertical point of the LCFS. | ||