RADIAL STRESS INFLUENCE ON HIGH-CURRENT DENSITY SUPERCONDUCTING MAGNET PERFORMANCE WITH LARGE AND SMALL-BORE

Dry-wound superconducting solenoid offers a good manufacturability of high current density magnet but occasionally suffers from premature qu enches triggered by small heat generated within the magnet. Principal source of he;tt is thought to be conductor motion induced frictional h eating and/or filler material fracture released energy, in windings. T his paper describes stress analysis, training performance and their re lation for both the large bore;Ind the small bore magnets constructed and tested to establish stability of the dry-wound superconductiong so lenoid. The results suggested that conductor motion took place even th ough radial stress in the magnet was still compressive and a conductor was expected in its original position, They also suggested that same stress condition in both large and small bore magnets triggered premat ure quenches even though they have difference in major specification.