RFSQUID
RFSQUID, short for Radio-Frequency Superconducting Quantum Interference Device, is a superconducting magnetometer that uses a single Josephson junction in a superconducting loop to detect extremely small magnetic flux changes. It is a variant of the SQUID family designed for radio-frequency readout, enabling rapid signal extraction and broad bandwidth.
The device operates by exploiting flux quantization in a superconducting loop. A magnetic flux threading the
Performance figures vary with design, but rf-SQUIDs can achieve flux sensitivities on the order of a few
Applications include high-sensitivity magnetometry for biomagnetism, geophysics, scanning SQUID microscopy, nondestructive evaluation, and detection of small
RFSQUIDs were developed in the late 20th century as part of the broader SQUID technology program and