DC-SQUID sensor system for multichannel neuromagnetometer

Evert Pieter Houwman, Dick Veldhuis, Jakob Flokstra, Hermanus J.M. ter Brake, W. Jaszczuk, 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 languageUndefined
Pages (from-to)2955-2958
Number of pages4
JournalIEEE transactions on magnetics
Volume27
Issue number27
DOIs
Publication statusPublished - 1991

Keywords

  • IR-24267
  • METIS-129067

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