GAQ: a computer program to find and analyze axisymmetric MHD plasma equilibria

Abstract
GAQ is a computer code that finds and analyzes free-boundary MHD equilibria of axisymmetric plasmas. The central problem approached by GAQ is that of determining the internal magnetic flux distribution of a toroidal MHD plasma at equilibrium, given the magnetic flux on or near some external conductors and the internal plasma current profile. It is assumed that the plasma currents and all external currents are toroidal and concentric. It is further assumed that the system is axisymmetric, thereby reducing the problem to the analysis of a two-dimensional cross section of the torus.

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