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Theoretical study of electrical current transport in various metal sheathed MgB2 superconducting wires
Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2020-12-24 , DOI: 10.1016/j.physb.2020.412675
Irshad Ahmad , P.M. Sarun

In this article, the estimation of current transfer length (CTL) and electric field of MgB2 (M) monofilamentary superconducting wires for various metals which are used as a sheath and barrier with their different cross-sectional compositions of superconducting core/barrier/sheath are studied. Among the studied superconducting wires, the least CTL values are estimated for M/Ti/Ta (0.48 mm), M/Ti/Nb (0.51 mm) and M/Nb/Fe (0.50 mm) superconducting wires with thin barrier combinations. The estimated CTL values indicate that M/Ti/Nb and M/Nb/Fe monofilamentary superconducting wires are preferable as compared to M/Ta/Cu, M/Nb/Ni and M/Ta/Ni. The heat flux density generated on the metallic sheath is lower for the M/Ti/Nb and M/Nb/Fe superconducting wires i.e., lowest electrical dissipation as compared to the M/Ta/Cu and M/Nb/Ni superconducting wires. The lowest CTL value and heat generation make M/Ti/Nb and M/Nb/Fe a promising combination of superconducting wires for practical applications.



中文翻译:

各种金属护套MgB 2超导线中电流输运的理论研究

本文估算了MgB 2的电流传输长度(CTL)和电场(M)研究了用于各种金属的单丝超导线材,它们被用作具有不同截面组成的超导芯/势垒/鞘的护套和势垒。在所研究的超导线中,具有薄势垒组合的M / Ti / Ta(0.48 mm),M / Ti / Nb(0.51 mm)和M / Nb / Fe(0.50 mm)超导线的CTL值最低。估计的CTL值表明,与M / Ta / Cu,M / Nb / Ni和M / Ta / Ni相比,M / Ti / Nb和M / Nb / Fe单丝超导线是优选的。M / Ti / Nb和M / Nb / Fe超导线在金属护套上产生的热通量密度较低,即,与M / Ta / Cu和M / Nb / Ni超导线相比,最低的电耗。

更新日期:2021-01-05
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