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Thermal stability of reinforced Nb3Sn composite superconductor under cryocooled conditions |
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| Authors: | Tsuyoshi Yamamoto Satoru Murase Gen Nishijima Akio Kimura |
| Affiliation: | a Department of Electrical and Electronic Engineering, Okayama University, 3-1-1, Tsushimanaka, Okayama 700-8530, Japan b HFLSM, Institute for Materials Research, Tohoku University, 2-2-1 Katahira, Aoba-ku, Sendai 980-8577, Japan c The Furukawa Electric Co., Ltd., 2-6-1 Marunouchi, Chiyoda-ku, Tokyo 100-8322, Japan |
| Abstract: | Several types of reinforced Nb3Sn wires have been developed to prevent reduction of superconducting properties by applying a strong electromagnetic force. To fabricate a cryocooled magnet using those reinforced wires, we experimentally measured the minimum quench energy (MQE) under cryocooled conditions of some reinforced Nb3Sn wires. As a result, it became clear that thermal stability expressed as MQE was controlled by the temperature margin between the temperature of the operating condition and the transition temperature from superconductivity to normal. Using the FEM analysis, it was realized that the cause of the decline in thermal stability for the reinforced wires was the low thermal conductivity of the reinforced materials. |
| Keywords: | Reinforced Nb3Sn wire MQE Cryocooling |
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