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Performance of dc SQUID (Superconducting Quantum Interference Device) series array amplifiers from dc to 500 MHz is examined. Arrays include as many as 100 dc SQUIDs, with varying amounts of intercoil damping.

Differential displacement caused by a gravitational force gradient is sensed by a superconducting quantum interference device (SQUID). Two superconducting test masses are elastically suspended from the instrument frame, and the SQUID is coupled to the masses by a current in the sensing circuits.

It is shown that interaction between the masses and the superconducting quantum interference device (SQUID) in a superconducting gradiometer does not necessarily cause a stiffening of mass movement and a consequent reduction of instrument sensitivity.

Research is presented concerning the numerical analysis of direct current-superconducting quantum interference devices (SQUIDs) in different asymmetric configurations. The damping and inductance of the SQUIDs is discussed.

An HTS dc-SQUID was used in the evaluation of the magnetic field in a BPSCCO cylinder superimposed by multi-layered soft-iron cylinders.

Research describing a step-edge fabrication process for YBCO Josephson junctions is presented. In particular the electrical characteristics of single layer gradiometers at a temperature of 77K are investigated.

Research describing a prototype direct-coupled, superconducting quantum interference device gradiometer is presented. In particular de-coupling and intrinsic balance are investigated and the device tested for use in a magnetically unshielded environment.

Research describing an aircraft wheel testing system based on a superconducting quantum interference device gradiometer is presented. The method utilizes differential eddy current excitation.

Research describing a superconducting quantum interference device operational amplifier is presented. The device uses dc SQUIDs to achieve a high open loop gain with low power requirements and a simple design.

Research describing te fabrication of high temperature, dc superconducting quantum interference device flip-chip sensors is presented. In particular the effects of different layouts of multilayer flux transformers are investigated.

Research describing the use of a high temperature, superconducting quantum interference device gradiometer for geophysical exploration is presented. The device is successfully tested against a Cs-vapour gradiometer under field conditions.

Research describing the use of a superconducting quantum interference device measurement system for detecting immunochemical reactions is presented. In particular magnetic relaxation immunoassays are investigated.

Research describing free fall tests at the Drop Tower, Bremen, to prove the Weak Equivalence Principle is presented. Measurements based on low temperature, superconducting interference device techniques are analysed.

Research describing the behavior of high temperature, single layer, superconducting quantum interference device gradiometers is presented. In particular the effect of an anti-parallel two-SQUID coupling scheme is investigated.

Research describing the development of a high temperature, superconducting quantum interference device gradiometer is presented. In particular the use of flux locked loop electronics for unshielded environments is investigated.

Research describing the fabrication of step edge junction, radio frequency superconducting quantum interference device gradiometers and magnetometers is presented. In particular the effects of different film properties and step structure are investigated.

Research describing the fabrication of YBCO dc superconducting quantum interference device magnetometers is presented. In particular the noise properties of the device are investigated with respect to the use of a sapphire substrate.

Research describing NBCO superconducting quantum interference devices and Josephson junctions is presented. In particular the noise and electrical characteristics of such devices is investigated at an operating temperature of 77K.

Research describing the behavior of high temperature, superconducting quantum interference devices subjected to magnetic fields is presented. In particular their stability against flux penetration is investigated.

Research describing superconducting quantum interference device magnetometers for use in magnetically unshielded environments is presented. In particular the use of slotted washers at the YBCO layers is investigated.

Research describing the magnetic properties of high temperature superconducting quantum interference device magnetometers is presented. In particular differing designs are investigated for biomagnetic applications.

Research describing the magnetic properties of radio frequency superconducting quantum interference device sensors is presented. In particular the use of step-edge junctions is investigated for magnetically unshielded environments.

Research describing the development of a superconducting quantum interference device gradiometer is presented. In particular unshielded applications for mobile situations in the Earth's magnetic field are investigated.

Research describing a high temperature superconducting quantum interference device magnetometer fabricated without a flux dam is presented. In particular the effects of a magnetically unshielded environment on the operation of the SQUID magnetometer are investigated.

Research describing a superconducting quantum interference device based eddy current probe is presented. In particular the use of YBCO allows superior resolution of fatigue cracks in such materials as airframes.

Research describing the behavior of high temperature, superconducting quantum interference device magnetometers subject to magnetic fields is presented. In particular the effects on noise of slots in the flux dam is investigated.

Research describing superconducting quantum interference device based gradiometers is presented. In particular different designs of planar gradiometers for the detection of flaw geometry are compared.

Research describing direct coupled superconducting quantum interference device magnetometers is presented. In particular the use of such devices in magnetically unshielded environments such as a typical laboratory is investigated.

Research describing the application of superconducting quantum interference device microscopy to the detection of plastic deformation in steel is presented. In particular the detection of deformation changes accompanied by changes in hardness is investigated.

Research describing nondestructive evaluation of materials by means of superconducting quantum interference devices is presented. In particular a method for determining defect depth information is developed.

Research describing high temperature superconducting quantum interference devices for nondestructive evaluation is presented. In particular the use of a linear array of eleven SQUID magnetometers arranged along a single substrate is investigated.

Research describing nondestructive testing by means of high temperature superconducting quantum interference devices is presented. In particular the measurement of eddy currents for detecting deep flaws is investigated.

Research describing nondestructive testing by means of high temperature superconducting quantum interference based devices is presented. In particular the use of a YBCO-based eddy current sensor is investigated.

Research describing the development of a superconducting quantum interference device based eddy current probe for nondestructive testing is presented. The probe utilizes a hybrid double-d sheet inducer coil.

Research describing a superconducting quantum interference device ammeter based on subranging architecture is presented. In particular a two range digital device with fine and coarse resolution channels is developed.

Research describing the dc voltage response of superconducting quantum interference filters is presented. In particular it is shown that in the LC-resonant mode conversion efficiency is not degraded.

Research describing the characteristics of high temperature, double Josephson junction resistive superconducting quantum interference devices is presented. In particular measurements of linewidth are investigated.

Research describing 32 bit superconducting quantum interference device electronics is presented. In particular software gradiometry for multi-channel magnetometer systems is developed.

Research describing a technique for fabricating superconductor-normal metal-superconductor junctions is presented. In particular an in-situ resistance measurement method for control of milling depths is developed.

Research describing the characteristics of a relaxation oscillation superconducting quantum interference device is presented. In particular the use of this device as a highly sensitive magnetometer is investigated.

Research describing a low noise, radio frequency amplifier based on a dc superconducting quantum interference device is presented. In particular a novel signal launching system for the device coupling is developed.

Research describing the characteristics of dc superconducting quantum interference device series array amplifiers is presented. In particular damping techniques for a number of different configurations are investigated.

Research describing a double relaxation oscillation superconducting quantum interference device is presented. Numerical simulations and design optimization for a device with a relaxation oscillation frequency of 100 MHz are investigated.

Research describing superconductor-normal metal-superconductor junctions is presented. In particular a method of fabrication utilizing a focussed ion beam microscope is investigated.

Research describing single photon sensors is presented. In particular the properties of superconducting quantum interference device array amplifiers coupled to detector pixels are investigated.

Research describing a control technique for the quantum state of a rf-superconducting quantum interference device is presented. Single flux quantum pulses are magnetically coupled to the qubit junction for critical current suppression.

Research describing a scanning method for nondestructive evaluation of materials is presented. The method is based on planar dc superconducting quantum interference device gradiometers that are galvanically coupled.

Research describing the use of a superconducting quantum interference device scanning microscope for the analysis of magnetic thin films is presented. Various techniques for the extraction of magnetic properties are investigated.

Research describing a high temperature superconducting quantum interference device for evaluating low velocity impact damage is presented. The use of the device on multi-ply carbon fibres is analysed.

Research describing a multiplexed superconducting quantum interference device for eddy current testing is presented. The device is based on three planar, high temperature superconducting, rf SQUID gradiometers.