Description
MAD: Suspensions
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Andrew Spencer07/10/2025, 09:00
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Dr Iryna Buchovska (Leibniz-Institut für Kristallzüchtung)07/10/2025, 09:15Talk
Monocrystalline silicon fibers are a promising candidate for suspending silicon test masses in gravitational-wave detectors. The excellent thermal and mechanical properties of crystalline silicon enable stable support of heavy mirrors and efficient extraction of laser-induced heat. Moreover, silicon's exceptional material behavior at cryogenic temperatures aligns well with the operational...
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Prof. Christophe Collette (University of Liege), Mr Gilles Magain (University of Liege)07/10/2025, 09:30Talk
The ET-FIBER project is a collaborative R&D initiative, focused on developing monocrystalline silicon fibres for suspending a 100 kg test mass in the E-TEST prototype. E-TEST serves as a critical cryogenic prototype for the Einstein Telescope , operates a large monocrystalline silicon mirror cooled radiatively to 20–25 K, while achieving low seismic noise below 10 Hz through advanced vibration...
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Flavio Travasso07/10/2025, 09:45Talk
In the last few months, tests have been carried out between Perugia/Camerino and Glasgow to evaluate how much a correct assembly technique and a specifically sized set-up affected the evaluation of the breaking load and the loss angle measurements.
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Hemendra Singh07/10/2025, 10:00Talk
The ETEST prototype, designed for the Einstein Telescope, a next-generation gravitational-wave observatory, employs a 100-kg test mass cooled to 20–25 K via radiative cooling to minimise thermal noise while maintaining effective seismic isolation below 10 Hz. The system integrates active isolation to suppress low-frequency seismic disturbances and incorporates cryogenic sensors and electronics...
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Matteo Baratti (University of Pisa, INFN Pisa)07/10/2025, 10:45Talk
Seismic attenuation in gravitational wave detectors relies on materials that show very small creep. Maraging steel has now been used since almost thirty years but systematic data about dissipation at low frequency haven’t been collected yet. We present measurements at room temperature of mechanical oscillation damping in a purpose-built maraging steel cantilever spring at low frequency under...
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Dr Emanuele Tofani (INFN Roma1-Università degli studi della Campania "Luigi Vanvitelli"), Eugenio Benedetti (INFN Roma1), Van Long Hoang (INFN-Roma1)07/10/2025, 11:00Talk
At the ARC-ETCRYO laboratory in Rome, a full-scale (1:1) cryogenic payload is being developed to investigate conductive cooling techniques for the Einstein Telescope. Materials with outstanding mechanical and thermal specifications are required to meet both suspension and test mass substrate requirements.
Sapphire is a very promising optimal candidate at least for the suspension elements,...
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Jennifer Docherty07/10/2025, 11:15Talk
The KAGRA suspension system has succesfully demonstrated the use of Sapphire as a suspension material for cryogenic gravitational wave detectors, however for this to be fully exploited in KAGRA and in the Einstein Telesopce new methods of fibre treatment and jointing are need to reduce the thermal noise cotnribution to detector sensitivity while maintaining heat extraction and mechanical...
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