Cooling performance of high thermal conduction plastics on conduction cooled Bi2223 tapes

Dyneema fiber has a high thermal conduction property. Using the property, we applied a Dyneema fiber reinforced plastic (DFRP) as a heat drain material for a conduction-cooled magnet. In the experiments, the DFRP was contacted on a surface of HTS tape, and a short-time over current exceeding its critical current was applied to the tape. The heat drain effect was measured from a voltage of the tape and a thermocouple. The experimental results showed that the effects depended on the fiber directions in the plastic. In case that the fibers in the plastic contacted perpendicular to the tape´s face, the effect was good. When the DFRP is used as the heat-drain material, we should pay attention to the fiber directions in the DFRP.