
SQUIDs
(for superconducting quantum interference devices) are the most sensitive detectors of magnetic fields. Their applications range from diagnosis of brain tumors to tests of relativity
John Clarke is a professor at the University of California, Berkeley, and a faculty senior scientist at Lawrence Berkeley Laboratory. He earned his B.A. degree in 1964 and his M.A. and Ph.D. degrees in 1968, all from the University of Cambridge. Clarke is a fellow of the Royal Society, the American Physical Society and the American Association for the Advancement of Science. He has spent most of his career working on superconductivity, particularly the development of SQUIDs and their applications to a variety of topics. He was a winner of the 2025 Nobel Prize in Physics.

SQUIDs
(for superconducting quantum interference devices) are the most sensitive detectors of magnetic fields. Their applications range from diagnosis of brain tumors to tests of relativity