What is a SQUID magnetometer?
SQUID Magnetometer\r The superconducting quantum interference device (SQUID) consists of two superconductors separated by thin insulating layers to form two parallel Josephson junctions. The device may be configured as a magnetometer to detect incredibly small magnetic fields– small enough to measure the magnetic fields in living organisms.
Why do we count oscillations in a squid device?
If a constant biasing current is maintained in the SQUID device, the measured voltage oscillates with the changes in phase at the two junctions, which depends upon the change in the magnetic flux. Counting the oscillations allows you to evaluate the flux change which has occurred.
What is a squid device?
SQUID Magnetometer and Josephson Junctions SQUID Magnetometer\r The superconducting quantum interference device (SQUID) consists of two superconductors separated by thin insulating layers to form two parallel Josephson junctions.
Why are SQUID devices so sensitive to magnetic flux?
The great sensitivity of the SQUID devices is associated with measuring changes in magnetic field associated with one flux quantum. One of the discoveries associated with Josephson junctions was that flux is quantized in units