[en] The work performed in support of the TFCX or DCT-8 studies is reported in detail and covers most aspects of the poloidal field (PF) design that were considered. The work, of a conceptual engineering design nature, included determination of magnetics, forces and fields; superconductor design and losses; structural channel support of internally cooled cable superconductor (ICCS); fault conditions for shorted PF coils; heat transfer, fluid dynamics, stability, and transient pressure rise for 3.0 and 4.5 K ICCS PF coils; and overall design of both pool bath cooled conductor (PBCC) and ICCS PF coil sets. Eddy current calculations in tokamak structures were made for transient conditions with a number of general and particular conclusions reached. Impovements to the 2 MJ switch test facility were made to increase its current carrying capacity substantially