Enhancement of tokamak ion transport due to electron collisions

In tokamaks where auxiliary ion heating leads to T i > T e, the neglect of electron collisions is no longer a good approximation in determining ion transport coefficients. The enhancement of the ion heat conduction due to electron collisions is determined for (a) the Pfirsch-Schliiter regime and (b) the banana regime for the case where is large. The enhancement of ion transverse viscosity (P|) is particularly important; the contribution due to ion-electron collisions is approximately equal to the ion-ion collision term even for T i = T e .