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物理学报. 1984, 33(4): 530-537.
doi: 10.7498/aps.33.530.
Nb-Ti超导体的声发射
- 收稿日期: 1983-04-01
- 刊出日期: 1984-02-05
摘要: 本文通过实验研究了Nb-Ti超导单芯裸线、多芯复合线在干绕和湿绕两种条件下,经历不同的励磁过程的声发射(AE)行为。发现导线的运动和磁通跳跃是声发射的主要源,而通常的磁通流动不出现可测的声发射,湿绕时导线移动的启动力比干绕提高一个数量级。如果导线发生宏观移动或完全磁通跳跃之前分别经历着一系列微滑移或不完全的磁通跳跃,则声发射技术有可能作为磁体猝灭的一种检测手段。
English Abstract
ACOUSTIC EMISSION IN Nb-Ti SUPERCONDUCTORS
- Received Date:
01 April 1983
- Published Online:
05 February 1984
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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