Speaker
Description
Magnetic noise will pose a significant limitation on the sensitivity of future Gravitational Wave (GW) detectors, such as the Einstein Telescope (ET), especially at low frequencies from a few Hz to approximately 100 Hz. This noise primarily originates from two sources: the natural terrestrial component (Schumann Resonances) and the environmental noise associated with the interferometer (so-called self-inflicted noise). Magnetic noise arises from the coupling of environmental fields with the magnetized components of the detector. This coupling can induce both direct magnetic forces and disturbances in the control signals, ultimately contributing to noise within the detector’s sensitivity range.
Building on experience from current GW detectors, efforts have been made to identify the key contributors to magnetic noise, with the goal of optimizing these factors in the future ET infrastructure. To meet the sensitivity goals of ET, it is essential to reduce environmental fields to the level of Earth’s noise and decrease magnetic couplings by a factor of approximately 10² - 10³ compared to current GW detectors.
This talk will focus on the ongoing activities of the magnetic noise work-package group for ET, including magnetic investigations related to current measurement campaigns targeting anthropogenic sources, simulation studies for mitigation strategies to integrate into the infrastructure, and the prototypes developed.
