A Room-Temperature Pre-calibration Procedure for Gradiometer Sifting

被引：1
|
作者：
Zhang Shu-Lin [1 ,2 ]
Liu Yang-Bo [1 ,2 ]
Liu Ming [3 ]
Wang Yong-Liang [1 ]
Kong Xiang-Yan [1 ]
Xie Xiao-Ming [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100190, Peoples R China
[3] Univ Sci & Technol China, Dept Elect Sci & Technol, Hefei 230026, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2011年 / 28卷 / 03期
关键词：
SQUID-MAGNETOMETER;
D O I：
10.1088/0256-307X/28/3/038501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In order to detect extremely weak magnetic signals, superconducting quantum interference device (SQUID) gradiometers are widely used to suppress environmental noise. A hardware SQUID gradiometer consists of a niobium gradio-antenna and an SQUID, which are coupled via an input coil. Here gradiometer imbalance may greatly reduce its noise suppression performance. The gradiometer balance depends on the geometrical forms of the antenna wound by niobium wire. We describe a simple method based on Faraday's law for the pre-calibration of the gradiometer balance at room temperature, before the gradiometer is set up. The pre-calibrating results are compared with the measured balance of an SQUID gradiometer system. This method may be used for sifting hardware gradiometers for multi-channel systems.
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页数：3
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