A 40A/mm2-24kA high-rigidity large forced-cooled (NbTi)3Sn superconducting coil named DPC-TJ was developed under the collaboration between Japan Atomic Energy Research Institute and Toshiba Corporation. The purpose of the DPC-TJ program is to demonstrate the realizability of the high average-current-density with a large coil wound by a large Nb3Sn superconductor which meets the requirements of the conductor for the next thermonuclear fusion machine. The DPC-TJ coil was fabricated as a first coil of the preformed-armor type, which was thought out in this program as a fabrication method that enables the high-rigidity and the high-current-density simultaneously without difficulty. In this paper, the outline of the DPC-TJ program is described laying stress on the development of the DPC-TJ coil.
