Eur. Phys. J. D 59, 407-412 (2010)
https://doi.org/10.1140/epjd/e2010-00184-6

Modelling the electric field applied to a tokamak

Alphawave Research, Atlanta, GA, 30238, USA

Corresponding author: ^a robjohnson@alphawaveresearch.com

Received: 31 January 2010
Revised: 19 March 2010
Published online: 6 July 2010

Abstract

The vector potential for the Ohmic heating coil system of a tokamak is obtained in semi-analytical form. Comparison is made to the potential of a simple, finite solenoid. In the quasi-static limit, the time rate of change of the potential determines the induced electromotive force through the Maxwell-Lodge effect. Discussion of the gauge constraint is included.