Abstract
In this paper, we present experimental results of acoustic emission in bare Nb-Ti single core superconductor and multifilamentary superconducting composite, which have undergone different excitation procedure in Si-rubber potted and dry modes.We have found that AE signals are chiefly generated by conductor motion or flux-ju-inping, but not by flux motion. The starting driving force for motion in Si-rubber potted sample is an order of magnitude higher than that in dry sample.Acoustic emission technique is a possible means for monitoring magnet quench as conductor goes through a series of microslip (or incomplete flux jump) before macromotion.
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