The outline of Large Coil Task (LCT) is described. This work is being carried out as an international collaboration under direction of the International Energy Agency for the purpose of superconducting toroidal coil development for fusion reactor. The common specification and the test conditions are explained. The characteristics of six coils, which are designed on the basis of specification and test condition, are compared. The systems and capacity of the Large Coil Test Facility (LCTF), which is being completed at Oak Ridge National Laboratory, is introduced.
At JAERI, the cluster test program (CTP) was started in 1977 as a development of high field superconducting toroidal coil in tokamak fusion machine. The cluster test facility (CTF) for this CTP has been designed and constructed. The coil system of the CTF, in which a test module coil (TMC) is tested, is composed of two cluster test coils (CTC) simulated a toroidal coil array. In this paper, the feature of the CTP and the design of two CTC of the CTF are described.