Accession Number : ADD006033

Title :   Stacked Squid Arrays.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Hinton,George F

Report Date : 20 Mar 1979

Pagination or Media Count : 14

Abstract : The described invention is briefly summarized as a means for increasing the sensitivity of Josephson Junction Cryogenic Magnetometers by unique design and construction of DC SQUID arrays. The SQUIDS are arrayed vertically and the sensitivity of each sensing point is increased by making an intimate, co-axial superposition of two or more two-junction SQUID loops using, for example, evaporated thin-film technology although fabrication is not limited solely to this technique. The device permits multiple SQUID loops to enclose the same applied magnetic flux thereby increasing the sensing volume and improving the coupling to the applied magnetic field. A primary object of invention is to provide a magnetometer of greatly reduced size, greatly increased sensitivity, and the capability to measure higher-order derivatives of magnetic fields. A further object of invention is to provide a magnetic sensing device employing a plurality of DC SQUID loops, each enclosing the same magnetic flux and a method for producing such a device. (Author)

Descriptors :   *Patent applications, *Magnetometers, *Cryogenics, *Josephson junctions, Electromagnetic pulses, Measuring instruments, Direct current, Construction, Thin films, Coupling(Interaction), Sizes(Dimensions), Sensitivity

Subject Categories : Geomagnetism
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE