The Loughborough research team has developed a multi-SQUID device that can operate at 77 Kelvin (-196.15 ºC) – achievable using liquid nitrogen.
Even at this temperature, the new device still outperforms most standard SQUIDs.
The new technology makes use of an array of SQUIDs – rather than a single device – increasing the accuracy and sensitivity of measurements.
Arrays only work effectively if individual SQUIDs experience flux coherency – the same magnetic flux passes through them – and interactions and interference between them are minimised.
Panels known as flux focusers are used to achieve this, but are currently cumbersome reducing the room available for large SQUID arrays.
To support the superior performance of its ground-breaking SQUID, the Loughborough team has also developed a novel flux focuser that resolves the issue of flux coherency and interaction without impacting the area available in the chip for arrays of hundreds of individual SQUIDs.
The research team’s paper is available to read on the AIP Scitation website.