Title :
Optimized HTS current leads
Author :
Gavrilin, A.V. ; Keilin, V.E. ; Kovalev, I.A. ; Kruglov, S.L. ; Shcherbakov, V.I. ; Akimov, I.I. ; Rakov, D.K. ; Shikov, A.K.
Author_Institution :
Kurchatov (I.V.) Inst. of Atomic Energy, Moscow, Russia
fDate :
6/1/1999 12:00:00 AM
Abstract :
The problem of optimizing HTS current leads by varying their cross-section along the length is investigated both experimentally and numerically at 500 A current level. Bi-2223-based HTS multi-filament composite tapes were used with two types of matrices: pure Ag and (Ag+1 at.% Au) alloy. The warm ends of the HTS parts of the current leads were cooled with liquid nitrogen. Very low evaporation rates in the case of Au-doped matrix and rather long time constants to reach thermal equilibrium were observed.
Keywords :
bismuth compounds; calcium compounds; copper compounds; gold alloys; high-temperature superconductors; multifilamentary superconductors; optimisation; silver; silver alloys; strontium compounds; superconducting cables; superconducting tapes; 500 A; Bi-2223 HTSC multi-filament composite tapes; Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O-Ag; Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O-AgAu; Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub x/ HTSC current leads optimisation; evaporation rates; liquid nitrogen cooling; thermal equilibrium; Alloying; Electric resistance; Gold alloys; High temperature superconductors; Multifilamentary superconductors; Nitrogen; Superconducting magnets; Temperature measurement; Thermal conductivity; Thermal resistance;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
