Cooling test of the 200 m superconducting DC transmission power cable system at Chubu University

The cooling test of the 200 m class superconducting DC power transmission system at Chubu University, CASER2, was performed. The heat leak of the cryogenic pipe of CASER2 was examined. The result of the heat leak measurement will be used further upgrade of CASER2. A second cooling test of CASER2, the 200 m class superconducting direct current power transmission system at Chubu University, was performed from August to October 2010. During this time, the system was cooled down and the liquid nitrogen which cooled the superconducting power cable was circulated in the cryogenic pipe of CASER2. The heat leak of the cryogenic pipe was measured and the values of about 300 W was obtained. This result will be used further improvements of CASER2.