Cryogenic radiative cooling of a large payload for gravitational wave detector: design and results of the E-TEST project

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ET-0708B-24.pdf (6.9 MB)
Document type Design
Abstract Third-generation gravitational wave detectors will use large mirrors isolated from seismic motion at low frequency, and also cooled down to cryogenic temperatures. In order to fulfill these two specifications, the E-TEST project explores the possibility of using a purely non-contact radiative cooling strategy. Based on cooling predictions, the paper includes a detailed design of the cryostat and the assembly procedure. A test campaign demonstrated that the proposed strategy succeeded in bringing the temperature of a 100 kg dummy mirror down to 22 K in 19 days. These encouraging results are paving the way toward a fully radiative approach for cooling the mirrors of the future Einstein Telescope.
Author(s) Lionel Jacques, Morgane Zeoli, Anthony Amorosi, Alessandro Bertolini, Christophe Collette, Robin Cornelissen, Chiara Di Fronzo, Serge Habraken, Joris V. van Heijningen, Gino Hoft, Robert Joppe, Tim J. Kuhlbusch, Mouhamad Haidar Lakkis, Bao Long Levan, Cédric Lenaerts, Jérôme Loicq, Benoit Marquet, Enrico Porcelli, Ameer Sider, Matteo Tacc
Code ET-0708B-24
LATEST RELEASE
Code issue time/date 08:42, Wednesday the 19th of March, 2025
Referral URL https://apps.et-gw.eu/tds/ql/?c=17726
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Series Published documents Papers / proceedings
Annex files
Other releases ET-0708A-24