Speaker
Description
We present the conceptual design of a novel cryogenic silicon suspension for the Einstein Telescope’s low-frequency detector. The proposed configuration departs from traditional tension-dominated suspensions by employing rigid beams and short flexures operating under compressional load. This approach leverages silicon’s substantially higher compressive strength to achieve improved mechanical robustness, while also achieving low suspension thermal noise and high thermal conductance for cryogenic cooling. Additionally, the proposed geometry permits the implementation of test-mass control forces, eliminating the need for a conventional recoil mass whilst being compatible with optical anti-springs to further enhance low-frequency vibration isolation. This presentation highlights the key design features and characteristics of this novel suspension.