Empirical investigation of factors affecting the stability of cable-in-conduit superconductors |
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| Affiliation: | 1. Center of Computational Energy, Department of Mechanical Engineering, Hakim Sabzevari University, Sabzevar, Iran;2. Department of Mechanical Engineering, Andong National University, Andong, South Korea;1. Institute of Thermal Technology, Silesian University of Technology, Konarskiego 22, Gliwice 44-100, Poland;2. SINTEF Energy Research, 7465 Trondheim, Norway;3. NTNU Department of Energy and Process Engineering, Kolbjørn Hejes vei 1d, 7465 Trondheim, Norway |
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| Abstract: | Experiments investigating the stability of cable-in-conduit superconductors were performed using test conductors composed of small, quadruplex cables enclosed in steel tubes. To examine the effects of a variation in stabilizer resistivity, all test conductors contained two strands of identical NbTi/Cu composite superconductor and two strands of solid copper. The grade of copper was varied for each test conductor so that a different net stabilizer resistivity existed for each conductor. When these conductors were operated outside the range of multiple stability, tests showed that their stability was negligibly affected by stabilizer resistivity; conversely, the range of operating currents for which multiple stability occurs was affected. However, the surprising result of this study is that stability is apparently affected when a large fraction of the copper stabilizer is segregated into separate cable strands. These observations are compared with other data in the literature. |
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