RMF Drive in an FRC

• In an FRC ?r = ve?/r is approximately set by equilibrium.

• Can get analytic RMF solution for

fixed ?r.

TRMF = ?2f(?,?r/?)[1 - ?r/?]To

T? = (?r/?)To

To = ?a4nme??

?2 = ?ce2/?//?? ? = rs/?

• Must have RMF torque exceed frictional torque to build up flux. Point 2 will be a stable operating point since increasing flux will reduce ?r.

• Flux buildup can continue by increasing Be, which increases ?r.

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