• Corpus ID: 244270492

Proposed large scale monolithic fused silica mirror suspension for 3rd generation gravitational wave detectors

@inproceedings{Cumming2021ProposedLS,
  title={Proposed large scale monolithic fused silica mirror suspension for 3rd generation gravitational wave detectors},
  author={A. V. Cumming and R. Jones and Giles D Hammond and J. Hough and Iain W. Martin and Sheila Rowan},
  year={2021}
}

• A. Cumming, R. Jones, +3 authors S. Rowan
• Published 17 November 2021
• Physics

Thermal noise from the suspension fibres used in the mirror pendulums in current gravitational wave detectors is a critical noise source. Future detectors will require improved suspension performance with the specific ability to suspend much heavier masses to reduce radiation pressure noise, whilst retaining good thermal noise performance. In this letter, we propose and experimentally demonstrate a design for a large-scale fused silica suspension, demonstrating its suitability for holding an increased mass of 160 kg. We demonstrate the concepts for improving thermal noise via longer suspension fibres supporting a higher static stress. We present a full thermal noise analysis of our prototype, meeting requirements for conceptual 3 generation detector designs such as the high frequency interferometer of the Einstein Telescope (ET-HF), and closely approaching that required for Cosmic Explorer (CE).