superconducting quantum interference device
Quick Summary
A SQUID, or superconducting quantum interference device, is an instrument used to detect and measure extremely weak magnetic fields. It operates based on the quantum interference of electrons within a Josephson junction, converting magnetic field changes into measurable voltage.12
SQUIDs are highly sensitive and have applications in various fields:
* Medical Imaging: Used in magnetic resonance imaging (MRI) to produce detailed images by differentiating tissue types.3
* Scientific Research: Employed in experiments like the Axion Dark Matter Experiment (ADMX) to detect faint signals from potential dark matter.2
* Geophysics and Materials Testing: Utilized in geological surveys and for non-destructive testing of materials.2
The core principle behind SQUIDs involves superconductivity, where materials lose all electrical resistance below a critical temperature. This allows for precise measurements due to low power dissipation and high sensitivity.4
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