Superconducting Properties and Microstructure of ${\rm V}_{3}{\rm Ga}$ Multifilamentary Wires Through a PIT Process Using High Ga Content Compounds
Superconducting Properties and Microstructure of ${\rm V}_{3}{\rm Ga}$ Multifilamentary Wires Through a PIT Process Using High Ga Content Compounds
复制标题
使用高 Ga 含量化合物通过 PIT 工艺实现 ${ m V}_{3}{ m Ga}$ 多丝线的超导性能和微观结构
DOI：
10.1109/tasc.2009.2018302
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发表时间：
2009
影响因子：
1.8
通讯作者：
A. Nishimura
中科院分区：
文献类型：
--
作者：
Y. Hishinuma;A. Kikuchi;Y. Iijima;T. Takeuchi;H. Taniguchi;M. Tomonaga;A. Nishimura
我们重新考虑了V3Ga复合焊丝在未来聚变反应堆中的应用。在氘-氚聚变反应过程中将形成14兆电子伏的快中子，因此未来的聚变反应堆将尽可能使用低活化材料。V3Ga化合物具有较短的放射性衰变时间，将成为低活化和高场性质的候选超导体之一，被称为低活化超导材料。目前的临界电流密度J不足以满足大型核聚变磁体的要求。我们研究了一种新的PIT工艺，使用高Ga含量的化合物来改善超导性能。使用高Ga含量Cu-Ga化合物的样品，其上临界场hc2随Ga含量的增加而增加，当使用50%的Ga化合物粉末时，其上临界场hc2为22.5 T。此外，还研究了镁对粉末长丝的影响。本文报道了新PIT工艺中Ga含量的依赖关系和Mg添加量对超导性能的影响。
We have reconsidered V3Ga compound wire for future fusion reactor application. 14 MeV fast neutrons will be formed during the deuterium-tritium fusion reaction, consequently future fusion reactors will be constructed using low activation materials wherever possible. V3Ga compound has a short radioactive decay time and it will be one of the candidate superconductors with both low activation and high field properties so called ldquolow activation superconducting materialsrdquo. The present critical current density, J c, is insufficient for large fusion magnet. We investigated a new PIT process, using high Ga content compound, in order to improve superconducting properties. The upper critical field, H c2, of the samples using high Ga content Cu-Ga compounds, was increased with increasing Ga content, and measured 22.5 T when was used 50 at%Ga compound powder. Moreover, the effect of Mg addition into the powder filament was also investigated. The small amount of Mg addition within 1 at%, was improved H c2 to about 23.0 T. The Ga content dependence and the Mg addition effect on the superconducting properties in the new PIT process are reported in this paper.