Einstein Telescope: Ferromagnetic Shielding for Magnetic Noise Mitigation

TL;DR

This paper evaluates the effectiveness of ferromagnetic shielding as a passive method to reduce magnetic noise in the Einstein Telescope, a next-generation gravitational wave detector aiming for ultra-sensitive low-frequency observations.

Contribution

It provides an analysis of ferromagnetic shielding's capabilities and limitations for magnetic noise mitigation in advanced gravitational wave detectors.

Findings

Ferromagnetic shielding can significantly reduce magnetic noise levels.

Limitations exist due to material saturation and environmental factors.

The study guides design improvements for noise mitigation in gravitational wave observatories.

Abstract

The Einstein Telescope is the next-generation gravitational wave interferometer which, compared to current detectors, will enable the observation of gravitational signals at lower frequencies with a sensitivity improved by approximately two orders of magnitude. Achieving such exceptional sensitivity requires minimizing all sources of noise. In the low-frequency regime, magnetic noise is one of the dominant. This article examines the effectiveness and limitations of a passive mitigation technique: ferromagnetic shielding.