Induced surface current effects on a magnetized plasma surrounded by a conducting wall

摘要

An earlier analysis of induced surface current effects on free-boundary modes of a magnetically confined plasma is extended to the case where the plasma is surrounded by a conducting wall. Two types of induced surface currents can then be identified. The first is due to the inhomogeneity of an externally imposed magnetic field part, and it exists also in absence of a conducting wall. The second is caused by compression or expansion of the magnetic field in the plasma-wall spacing. An analysis is further presented in which the plasma boundary condition and the induced surface currents become basic concepts in the formulation of the energy principle. A discussion of and comparison with the conventional extended energy principle is performed in which questionable points of the latter are being identified. 9 refs, 5 figs. (Atomindex citation 26:048886)