High-Tc SQUID magnetometers and gradiometers for NDE application

被引：10

作者：

Jeng, JT

Horng, HE

Yang, HC ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan

[2] Natl Taiwan Normal Univ, Dept Phys, Taipei 116, Taiwan

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2002年 / 368卷 / 1-4期

关键词：

magnetometer; gradiometer; SQUID NDE;

D O I：

10.1016/S0921-4534(01)01148-0

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The performance of the superconducting quantum interference device (SQUID) nondestructive evaluation (NDE) system with a shielded magnetometer and unshielded gradiometers were investigated, In the magnetometer NDE system, the environmental noise was reduced with the SQUID seating inside a L-metal cylinder, whereas the environmental noise was eliminated with electronic subtraction in the gradiometer NDE system. For the shielded magnetometer NDE system, the signal-to-noise ratio was improved with a higher excitation field to enhance the defect signal. For the gradiometer NDE system, the signal-to-noise ratio was improved as a result of the reduction of environmental noise. The performance of two SQUID NDE systems is compared and the results are discussed. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：105 / 108

页数：4

共 7 条

[1] Detection of deep flaws by using a HTS-SQUID in unshielded environment [J].