Journal of Physics A: Mathematical and General.
Vol. 15.
1982.
P. 269-275
The authors consider the second order drift theory approximation for charged particle motion in a Tokamak; the second order term describing inertial drift is used. It is shown that this drift increases the maximum displacement of trapped particles if the electric drift velocity VE>0, and decreases it if VE<0. The considered effect is completely caused by the toroidal effects of the magnetic field, and depends on the Tokamak safety factor.