Development of low thermal conductivity Ag–Au alloy sheath Bi-2223 tape and design of a 20 kA HTS current lead
✍ Scribed by Hongjie Zhang; Qingfu Li; Jun Zong; Ningbo Dong
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 325 KB
- Volume
- 412-414
- Category
- Article
- ISSN
- 0921-4534
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✦ Synopsis
In a low temperature superconducting magnet system, the conventional vapor cooled copper current leads, working in the temperature range from 4.2 K to room temperature, carry high current and result in a large portion of heat loads for the cryogenic system. High temperature superconducting (HTS) ceramic combines low thermal conductivity with the ability to carry current without resistive loss at temperatures up to 100 K, and so offer the possibility of reducing the refrigeration power and operational costs. This paper presents the development of a new low thermal conductivity Ag-4at%Au alloy sheath Bi-2223 tape. The performance of this low thermal conductivity Bi-2223 tape is also introduced. At the end of this paper, the design of a 20 kA HTS current lead is given.