Magnetic fields interfere with the interferometer through several "coupling" mechanisms:
: Fluctuating magnetic fields induce currents in the conductive structures of the detector (like the "payload" holding the mirrors), which in turn create secondary magnetic fields and forces. Problems of intense magnetic field in gravitati...
In gravitational wave (GW) detectors, intense or fluctuating magnetic fields create "magnetic noise" that can mimic or obscure the incredibly faint signals from cosmic events like black hole mergers. This noise is a critical challenge for current interferometers like LIGO and Virgo , and it is expected to be a primary limiting factor for next-generation detectors like the Einstein Telescope . 1. Primary Sources of Magnetic Noise Problems of intense magnetic field in gravitati...