A SQUID gradiometer module with wire-wound pickup antenna and integrated voltage feedback circuit

被引：9

作者：

Zhang, Guofeng ^{[1
,2
,3
,4
]}

Zhang, Yi ^{[1
,3
]}

Zhang, Shulin ^{[2
,3
]}

Krause, Hans-Joachim ^{[1
,3
]}

Wang, Yongliang ^{[2
,3
]}

Liu, Chao ^{[1
,2
,3
,4
]}

Zeng, Jia ^{[2
,3
,4
]}

Qiu, Yang ^{[2
,3
,4
]}

Kong, Xiangyan ^{[2
,3
]}

Dong, Hui ^{[2
,3
]}

Xie, Xiaoming ^{[2
,3
]}

Offenhaeusser, Andreas ^{[1
,3
]}

Jiang, Mianheng ^{[2
,3
]}

机构：

[1] Forschungszentrum Julich, Peter Grunberg Inst PGI 8, D-52425 Julich, Germany

[2] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol SIMIT, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China

[3] Collaborat CAS Shanghai & FZJ, Joint Res Lab Superconduct & Bioelect, Shanghai 200050, Peoples R China

[4] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2012年 / 480卷

关键词：

SQUID; Gradiometer; MCG; MEG; MAGNETOMETER;

D O I：

10.1016/j.physc.2012.04.023

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The performance of the direct readout schemes for dc SQUID, Additional Positive Feedback (APF), noise cancellation (NC) and SQUID bootstrap circuit (SBC), have been studied in conjunction with planar SQUID magnetometers. In this paper, we examine the NC technique applied to a niobium SQUID gradiometer module with an Nb wire-wound antenna connecting to a dual-loop SQUID chip with an integrated voltage feedback circuit for suppression of the preamplifier noise contribution. The sensitivity of the SQUID gradiometer module is measured to be about 1 fT/(cm root Hz) in the white noise range in a magnetically shielded room. Using such gradiometer, both MCG and MEG signals are recorded. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

引用

页码：10 / 13

页数：4

共 9 条

[1] THE PTB 83-SQUID SYSTEM FOR BIOMAGNETIC APPLICATIONS IN A CLINIC [J].