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* ''R<sub>min</sub>'' is the minimum value of ''R'' along the LCFS or separatrix. | * ''R<sub>min</sub>'' is the minimum value of ''R'' along the LCFS or separatrix. | ||
* ''R<sub>geo</sub>'' is the geometric major radius, defined as ''(R<sub>max</sub> + R<sub>min</sub>)/2''. | * ''R<sub>geo</sub>'' is the geometric major radius, defined as ''(R<sub>max</sub> + R<sub>min</sub>)/2''. | ||
* ''a'' is the minor radius of the plasma, defined ''(R<sub>max</sub> - R<sub>min</sub>)/2''. | * ''a'' is the minor radius of the plasma, defined as ''(R<sub>max</sub> - R<sub>min</sub>)/2''. | ||
* ''R<sub>upper</sub>'' is the major radius of the highest vertical point of the LCFS. | * ''R<sub>upper</sub>'' is the major radius of the highest vertical point of the LCFS. | ||
* ''R<sub>lower</sub>'' is the major radius of the lowest vertical point of the LCFS. | * ''R<sub>lower</sub>'' is the major radius of the lowest vertical point of the LCFS. | ||