H. Moriyama et al., DESIGN AND FABRICATION OF HIGHLY STABILIZED CLOSE-PACKED SUPERCONDUCTING SOLENOID, IEEE transactions on magnetics, 32(4), 1996, pp. 3028-3031
The highly stabilized superconducting solenoid has been fabricated suc
cessfully by the dry winding method with the appropriate design of for
mer and ground insulators. In this work the unexpected decrease of que
nch current was remarked as the index of the instability in the superc
onducting solenoids because it becomes a serious problem in practical
application. The change of the contact condition between the former an
d the winding was thought to induce the instability therefore the opti
mization of the contact condition was tried. The former with high ther
mal contraction and high rigidity and the ground insulator coated with
the release film were selected for the solenoid design. It was found
that the highly stable superconducting solenoids could be designed and
fabricated by this selection.