DC-SQUID SENSOR SYSTEM FOR MULTICHANNEL NEUROMAGNETOMETRY

被引：4

作者：

HOUWMAN, EP ^{[1
]}

VELDHUIS, D ^{[1
]}

FLOKSTRA, J ^{[1
]}

TERBRAKE, HJM ^{[1
]}

JASZCZUK, W ^{[1
]}

MARTINEZ, A ^{[1
]}

ROGALLA, H ^{[1
]}

机构：

[1] UNIV ZARAGOZA,ETSII,E-50015 ZARAGOZA,SPAIN

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1991年 / 27卷 / 02期

关键词：

D O I：

10.1109/20.133830

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Various DC-SQUID sensor configurations were developed for use in our 19-channel neuromagnetometer. Apart from the standard type, resistively and inductively shunted SQUIDs were made, allowing for a large screening factor beta (> 1). In this way signal coupling from the pick-up coil to the SQUID is facilitated and capacitive coupling between the input coil and the SQUID washer can be decreased. The number of turns of the input coil is decreased further by allowing for an inductance mismatch in the input circuit. Although theoretically both measures give rise to an increased field noise of the sensor, they may lead to a reduction of the excess noise and the noise balance may become positive.

引用

页码：2955 / 2958

页数：4

共 17 条

[1] CONDUCTANCE STUDIES ON DIFFERENT TYPES OF NB/AL,AIOX(/AL)/NB JOSEPHSON TUNNEL-JUNCTIONS [J].