Stray field perturbations induced by the poloidal field magnet leads in IGNITEX

Summary form only given. The vacuum stray fields produced by the PF (poloidal field) leads in IGNITEX were calculated in detail. In the proposed design, each PF coil is fed by extended parallel flat plates close together so that they significantly self-cancel the magnetic field produced by the current flowing in opposite directions. The shapes of the terminals are modified based both on design considerations of the toroidal field (TF) magnet and on the perturbed fields produced by the terminals. Emphasis is given to the analysis of the plasma breakdown phase of the IGNITEX discharge. Stray field errors throughout the discharge are analyzed. This provides the basis for the evaluation of boundary conditions to study the magnetic configuration in the plasma as modified by stray field errors