학술논문
Critical Current Density and Current Transfer Length of Multifilamentary $\hbox{MgB}_{2}$ Strands of Various Design
Document Type
Periodical
Author
Source
IEEE Transactions on Applied Superconductivity IEEE Trans. Appl. Supercond. Applied Superconductivity, IEEE Transactions on. 23(3):6200204-6200204 Jun, 2013
Subject
Language
ISSN
1051-8223
1558-2515
2378-7074
1558-2515
2378-7074
Abstract
In this paper, a series of high-performing powder-in-tube $\hbox{MgB}_{2}$ strands have been prepared. Transport voltage-current measurements were performed to determine the effects of C doping and strand geometry such as filament numbers. The best $J_{ \rm c}$ for our samples was $1.0 \times 10^{5}\ \hbox{A/cm}^{2}$ at 4.2 K, 7 T, for a strand using B powder with 3% C addition. The current transfer length was also measured for $\hbox{MgB}_{2}$ short wires with Nb chemical barrier and Monel outer sheath. The current transfer length ranged from 2 to 12 mm, and had a correlation with the filament numbers.