DC-SQUID sensor system for multichannel neuromagnetometer

Evert Pieter Houwman; Dick Veldhuis; Jakob Flokstra; Hermanus J.M. ter Brake; W. Jaszczuk; A. Martinez; Horst Rogalla

doi:10.1109/20.133830

DC-SQUID sensor system for multichannel neuromagnetometer

Evert Pieter Houwman, Dick Veldhuis, Jakob Flokstra, Hermanus J.M. ter Brake, W. Jaszczuk, A. Martinez, Horst Rogalla

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Abstract

Various DC SQUID sensor configurations were developed for use in a 19-channel neuromagnetometer. Apart from the standard type, resistively and inductively shunted SQUIDs were made, allowing for a large screening factor ß (>1). In this way, signal coupling from the pickup coil to the SQUID is facilitated and 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

Original language	English
Pages (from-to)	2955-2958
Number of pages	4
Journal	IEEE transactions on magnetics
Volume	27
Issue number	27
DOIs	https://doi.org/10.1109/20.133830
Publication status	Published - 1991

Keywords

IR-24267
METIS-129067

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DC-SQUID_sensor_-_houwman

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title = "DC-SQUID sensor system for multichannel neuromagnetometer",

abstract = "Various DC SQUID sensor configurations were developed for use in a 19-channel neuromagnetometer. Apart from the standard type, resistively and inductively shunted SQUIDs were made, allowing for a large screening factor {\ss} (>1). In this way, signal coupling from the pickup coil to the SQUID is facilitated and 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",

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doi = "10.1109/20.133830",

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T1 - DC-SQUID sensor system for multichannel neuromagnetometer

AU - Houwman, Evert Pieter

AU - Veldhuis, Dick

AU - Flokstra, Jakob

AU - ter Brake, Hermanus J.M.

AU - Jaszczuk, W.

AU - Martinez, A.

AU - Rogalla, Horst

PY - 1991

Y1 - 1991

N2 - Various DC SQUID sensor configurations were developed for use in a 19-channel neuromagnetometer. Apart from the standard type, resistively and inductively shunted SQUIDs were made, allowing for a large screening factor ß (>1). In this way, signal coupling from the pickup coil to the SQUID is facilitated and 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

AB - Various DC SQUID sensor configurations were developed for use in a 19-channel neuromagnetometer. Apart from the standard type, resistively and inductively shunted SQUIDs were made, allowing for a large screening factor ß (>1). In this way, signal coupling from the pickup coil to the SQUID is facilitated and 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

KW - IR-24267

KW - METIS-129067

U2 - 10.1109/20.133830

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M3 - Article

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EP - 2958

JO - IEEE transactions on magnetics

JF - IEEE transactions on magnetics

IS - 27

ER -

DC-SQUID sensor system for multichannel neuromagnetometer

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Keywords

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