Abstract
Rare Earth based coated conductors are very promising conductors for the construction of high field solenoids. Development of coil winding technique was started at the Tsukuba Magnet Laboratory: coils of various sizes (from 18mm to 220mm of an inner diameter) have been fabricated by layer-winding without impregnation in order to test the mechanical and superconducting properties. In the thin 220mm diameter coil the Hoop stress reached over 500MPa at 130A in 14T background field, without degradation of the superconducting properties. In the small diameter coils (18mm of inner diameter) the tape was insulated using enamel to minimize the cross section and to enhance the coil current density. The highest field generated was 2.1T in a background field of 18T (total field was 20.1T) at 4.2K and the coil current density was 240A/mm2.
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