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Conceptual cryostat design for cryogenic suspension studies for the Einstein Telescope

Koroveshi, Xhesika ORCID iD icon 1; Grohmann, Steffen ORCID iD icon 2; Rapagnani, Piero; Mangano, Valentina; Stamm, Michael 1
1 Institut für Beschleunigerphysik und Technologie (IBPT), Karlsruher Institut für Technologie (KIT)
2 Institut für Technische Thermodynamik und Kältetechnik (TTK), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

The Einstein Telescope (ET) is a third generation gravitational wave detector, combining a low-frequency (LF) and a high-frequency (HF) laser interferometer. Cryogenic operation of ET-LF in the temperature range of 10K to 20K is essential to suppress the suspension thermal noise, which dominates the detection sensitivity at frequencies below 10 Hz. This requires suspension materials with high thermal conductivity and low mechanical dissipation at cryogenic temperatures. Two possible suspension concepts are currently considered, using either monocrystalline suspension fibers made of silicon or sapphire, or titanium suspension tubes filled with static He-II. The dissipative behavior of these suspensions is characterized by the mechanical Q-factor. It can be measured by the ring-down method, exciting the suspensions to resonance vibrations on the nanometer scale and analyzing the decay time. For this purpose, a new cryogenic test facility is being planned, allowing the investigation of cryogenic payload suspensions for third-generation gravitational wave detectors. The test cryostat is equipped with a cryocooler and enables real-size studies with various suspension materials and geometries. ... mehr


Volltext §
DOI: 10.5445/IR/1000162313
Veröffentlicht am 19.09.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Beschleunigerphysik und Technologie (IBPT)
Institut für Technische Thermodynamik und Kältetechnik (TTK)
Publikationstyp Vortrag
Publikationsdatum 12.07.2023
Sprache Englisch
Identifikator KITopen-ID: 1000162313
HGF-Programm 54.11.11 (POF IV, LK 01) Accelerator Operation, Research and Development
Veranstaltung 25th Joint Cryogenic Engineering Conference and International Cryogenic Materials Conference (CEC/ICMC 2023), Honolulu, HI, USA, 09.07.2023 – 13.07.2023
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