PF coil system comparisons for a compact ignition device

Preliminary designs for the poloidal field coil system for several alternative concepts for the Ignition Studies Project are analyzed. Options include both a limiter and divertor configuration with PF coils located internal to the TF coil, external to the TF coil, and a mixture of internal and external (hybrid coils). The effect of the system parameters of ampere-meters, stored and dissipated energy, and peak requirements are reported. The all internal coil configuration for the diverted plasma has significantly lower ampere-meters, energy, and power requirements. However, internal coils are disadvantageous from the remote maintenance standpoint