: Devices within the observatory itself—such as power grid cables, motors, pumps, and electronics—generate localized magnetic fields that can interfere with sensitive detector components.
: Interferometers use permanent magnets and coils to control the position of their mirrors (test masses). External magnetic fields exert direct forces on these magnets, moving the mirrors and creating a false signal. Problems of intense magnetic field in gravitati...
Magnetic interference in GW detectors stems from both natural and human-made sources: : Devices within the observatory itself—such as power
Magnetic fields interfere with the interferometer through several "coupling" mechanisms: Magnetic interference in GW detectors stems from both
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