Fusion Experimental Reactors are one of the major steps toward realization of the fusion energy and the key objectives are to demonstrate the scientific and technological feasibility prior to the Demo Fusion Reactor, ITER (International Thermonuclear Experimental Reactor) is one of experimental reactors and the conceptual design has been completed by the united efforts of USA, USSR, EC and Japan. In parallel with the conceptual design, key technology development in various areas has being conducted. This paper describes the overall design concepts and the latest technological achievements of the ITER reactor structure and superconducting magnet system.
Multichannel SQUID systems for biomagnetic measurement are developed recently in the whole world. Such systems can detect the weak magnetic flux generated by the brain activity, because a magnetometer based on SQUID has high sensitivity. This paper reviews technical problems to construct more than 100 channel system and the latest development of components such as SQUIDs, pickup coils, electronics and so on.
Critical current density Jc and its temperature dependence in multifilamentary NbTi wires were measured. Further their pinning behavior was examined. Used samples which have been fabricated by a double stacking method are divided into two groups