Superconducting Quantum Interference Device- SQUID
| Return to Research Tool Menu |
Background
SQUID is an extremely sensitive device used to measure the magnetic and paramagnetic properties of materials. The SQUID sensor consists of a superconducting circuit separated by a parallel Josephson junctions. The sensor is connected to a pickup coil inside a superconducting magnet. When the sample is moved inside the magnet and pickup coil this triggers an quantum interference pattern in the squid detector which causes voltage proportional to the change in magnetic flux caused by the sample. Thus extremely small magnetic properties are amplified into a measurable voltage.
Significance
<swf width="500" height="400">images/7/75/Squid.swf</swf>
Operation
External Links
see wikipedia:SQUID