A 19-channel d.c. SQUID magnetometer system for brain research

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

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A 19-channel d.c. SQUID magnetometer system for neuromagnetic investigations is under constuction. The first-order gradiometers for sensing the signal are placed in a hexagonal configuration. D.c. SQUIDs based on niobium/aluminium technology have been developed, leading to a field sensitivity of about 5 fT/ Hz. SQUID read-out is realized with a resonant transformer circuit at 100 kHz. The multichannel control and detection electronics are compactly built.
Original languageUndefined
Pages (from-to)781-785
Number of pages5
JournalSensors and actuators. A: Physical
Issue number27
Publication statusPublished - 1991


  • METIS-129146
  • IR-72994

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