HIGH-TEMPERATURE RF SQUID GRADIOMETER APPLIED TO NONDESTRUCTIVE TESTING

被引：5
|
作者：
FAN, CX
LU, DF
WONG, KW
XIN, Y
XU, B
ALZAYED, NS
CHESTER, M
KNAPP, DE
机构：
[1] UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024
[2] MIDWEST SUPERCONDUCT INC,LAWRENCE,KS 66049
来源：
CRYOGENICS | 1994年 / 34卷 / 08期
关键词：
HIGH TC RF SQUID; GRADIOMETER; NONDESTRUCTIVE TESTING;
D O I：
10.1016/0011-2275(94)90145-7
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
This paper reports the utilization of a high temperature superconducting (HTS) RF SQUID gradiometer in non-destructive testing (NDT), A two-hole HTS RF SQUID, capable of working in a noisy environment without any magnetic shielding, is employed as a gradiometer sensor without using flux transformer coils. This gradiometer, maintained at LN2 temperature, is sensitive enough to detect small mock cracks in an aluminium alloy slab covered by another 25.4 mm thick solid aluminium alloy slab. Such an NDT device should have a significant impact on metal fatigue detection technology and demonstrates an important practical usage of high temperature superconductors.
引用
收藏
页码：667 / 670
页数：4
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