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Superconducting biomagnetometer with inductively coupled pickup coil

  • US 5,158,932 A
  • Filed: 07/17/1990
  • Issued: 10/27/1992
  • Est. Priority Date: 07/31/1989
  • Status: Expired due to Term
First Claim
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1. A biomagnetometer, comprising:

  • a magnetic pickup coil formed of a material that is superconducting at a temperature less than its superconducting transistion temperature;

    a first container that contains the pickup coil, the first container maintaining the pickup coil at a temperature at which it is superconducting;

    a detector of small electrical currents formed of a material that is superconducting at a temperature less than its superconducting transition temperature;

    a second container that contains the detector, the second container maintaining the detector at a temperature at which it is superconducting, the second container being disposed such that it is not within the first container; and

    an inductive coupler having a pair of induction coils positioned adjacent each other such that an electrical current flowing in a first coil is coupled to a second coil,the first induction coil being within the first container, electrically connected to the magnetic pickup coil, and made of a material that is superconducting at the temperature at which the magnetic pickup coil is superconducting, andthe second induction coil being within the second container, electrically connected to the detector, and made of a material that is superconducting at the temperature at which the detector is superconducting.

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