SQUID
Videos
A SQUID is a very sensitive magnetometer used to measure extremely weak magnetic fields, based on superconducting loops containing Josephson junctions.
Sensing element of a SQUID, 2008
A prototype SQUID
The inner workings of an early SQUID, circa 1990
Josephson junction
Videos
A Josephson junction is a nonlinear, dissipationless circuit element that uses the Josephson effect in superconductors to form a nonlinear inductor. It consists of a weak barrier separating two superc
SQUID
…quantum interference device) is a very sensitive magnetometer used to measure extremely weak magnetic fields, based on superconducting loops containing Josephson junctions. SQUIDs are sensitive enough to measure magnetic fields as low as 5×10−18 T with a few days of averaged measurements (see orders of magnitude (magnetic…
Two Josephson junctions (orange) in parallel.
An electron beam lithographer (EBL) machine, located inside of a cleanroom, can be used to pattern resist in Josephson junction fabrication.
The first practical, stable, and easy to use 1-volt standard chip was created at NIST, based on superconducting Josephson junctions.