Large T/sub c/, B/sub c2/ and I/sub c/ enhancement effect due to the prebending treatment for bronze route Nb/sub 3/Sn wires
Large T/sub c/, B/sub c2/ and I/sub c/ enhancement effect due to the prebending treatment for bronze route Nb/sub 3/Sn wires
复制标题
青铜线Nb/sub 3/Sn线材经过预弯处理，T/sub c/、B/sub c2/、I/sub c/增强效果大
DOI：
10.1109/tasc.2005.849361
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发表时间：
2005
影响因子：
1.8
通讯作者：
S. Meguro
中科院分区：
文献类型：
--
作者：
K. Watanabe;S. Awaji;H. Oguro;G. Nishijima;K. Miyoshi;S. Meguro
为了研制一种反应风(R&W)工艺的Nb/Sub3/Sn超导磁体，我们研究了预弯处理对其超导性能的影响。由于反应的Nb/sub3/Sn线对应力和应变的响应非常敏感，我们重点讨论了预弯处理，在R&W线圈缠绕过程中，通过几个滑轮反复对Nb/sub3/Sn线进行预弯处理。我们发现，预弯处理使青铜Nb/sub3/Sn线在20T和4.2K时的I/subc/值增加了一倍。该I/SUB c/增强效果来自T/SUB c/和B/SUB C2/增强。结果表明，青铜多芯Nb/Sub3/Sn线在4.5K时，以1.0%的弯曲应变预弯5次，T/subc/从17.4K增加到17.9K，B/subc2/也从23.7增加到25.2T。
In order to develop a react-and-wind (R&W) processed Nb/sub 3/Sn superconducting magnet, we investigated the influence on the superconducting properties due to the prebending treatment. Since a reacted Nb/sub 3/Sn superconducting wire reveals a very sensitive response from stress and strain, we focus on the prebending treatment which is repeatedly applied to the Nb/sub 3/Sn wire through several pulleys in the R&W coil winding process. We found that the prebending treatment doubles the I/sub c/ value at 20 T and 4.2 K for bronze route Nb/sub 3/Sn wires. This I/sub c/ enhancement effect comes from the T/sub c/ and B/sub c2/ enhancement. It turned out that T/sub c/ increases from 17.4 to 17.9 K and as a result B/sub c2/ also increases from 23.7 to 25.2 T at 4.5 K for bronze route multifilamentary Nb/sub 3/Sn wires prebent at bending strain of 1.0% and at 5 repeated times.