Title :
Study of Joint Resistance in Nb3Al-NbTi Superconducting Joint for High Field NMR
Author :
Fukuzaki, T. ; Maeda, H. ; Matsumoto, S. ; Yokoyama, S. ; Kiyoshi, T.
Author_Institution :
RIKEN Genomic Sci. Center, Yokohama
fDate :
6/1/2007 12:00:00 AM
Abstract :
We have developed a novel superconducting joint method for Nb3Al conductors, which can be used for the innermost coil of a 1-GHz NMR magnet. First, we optimized the joint property; then, we prepared a closed circuit with an NbTi coil and a pair of Nb3Al-NbTi joints; finally, we determined the joint resistance by using the field decay of the persistent current. A joint resistance of 1.27 times 10-12 Omega was obtained, which is sufficiently low for high field NMR.
Keywords :
aluminium alloys; microwave circuits; niobium alloys; nuclear magnetic resonance; superconducting microwave devices; titanium alloys; NMR magnet; Nb3Al-NbTi - Interface; closed circuit; frequency 10 GHz; joint resistance; superconducting joint method; Circuits; Conductors; Magnetic field measurement; Niobium compounds; Nuclear magnetic resonance; Persistent currents; Superconducting coils; Superconducting epitaxial layers; Superconducting magnets; Titanium compounds; 1-GHz NMR; ${rm Nb}_{3}{rm Al}$ conductor; Joint resistance; persistent mode; superconducting joint;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.897259
