Apparatus for measuring weak static magnetic field using superconduction strips and a SQUID magnetometer
AssigneesResearch Development Corporation, Junpei Yuyama, Qiquan Geng
InventorsJunpei Yuyama, Qiquan Geng, Kazunori Chihara, Hirofumi Minami, Eiichi Goto
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Abstract
A magnetic field measurement system including a pick-up coil is not moved but fixed. Strips of superconducting material are arranged in a plane with narrow slits between the strips. The strips are moved very near the pick-up coil along the plane. From output variations of a SQUID magnetometer during the movement, a magnitude of a static field perpendicular to the plane of the strips is obtained.
Claims6
An apparatus for measuring a weak static magnetic field, including a superconducting quantum interference device (SQUID) and a pick-up coil magnetically coupled thereto, said apparatus comprising:
- an array of superconducting strips which are arranged in a plane and separated by narrow slits, and
- means for moving said array in a direction parallel to the plane and at a small distance from the pick-up coil.
Dependencies are inferred from the claim text.