ETpathfinder: a cryogenic testbed for interferometric gravitational-wave detectors
Creators: name: Utina, A.
name: Amato, A.
name: Arends, J.
name: Arina, C.
name: de Baar, M.
name: Baars, M.
name: Baer, P.
name: van Bakel, N.
name: Beaumont, W.
name: Bertolini, A.
name: van Beuzekom, M.
name: Biersteker, S.
name: Binetti, A.
name: ter Brake, H. J. M.
name: Bruno, G.
name: Bryant, J.
name: Bulten, H. J.
name: Busch, L.
name: Cebeci, P.
name: Collette, C.
name: Cooper, S.
name: Cornelissen, R.
name: Cuijpers, P.
name: van Dael, M.
name: Danilishin, S.
name: Dixit, D.
name: van Doesburg, S.
name: Doets, M.
name: Elsinga, R.
name: Erends, V.
name: van Erps, J.
name: Freise, A.
name: Frenaij, H.
name: Garcia, R.
name: Giesberts, M.
name: Grohmann, S.
name: Van Haevermaet, H.
name: Heijnen, S.
name: van Heijningen, J. V.
name: Hennes, E.
name: Hennig, J. -S.
name: Hennig, M.
name: Hertog, T.
name: Hild, S.
name: Hoffmann, H. -D.
name: Hoft, G.
name: Hopman, M.
name: Hoyland, D.
name: Iandolo, G. A.
name: Ietswaard, C.
name: Jamshidi, R.
name: Jansweijer, P.
name: Jones, A.
name: Jones, P.
name: Knust, N.
name: Koekoek, G.
name: Koroveshi, X.
name: Kortekaas, T.
name: Koushik, A. N.
name: Kraan, M.
name: van de Kraats, M.
name: Kranzhoff, S. L.
name: Kuijer, P.
name: Kukkadapu, K. A.
name: Lam, K.
name: Letendre, N.
name: Li, P.
name: Limburg, R.
name: Linde, F.
name: Locquet, J. -P.
name: Loosen, P.
name: Lueck, H.
name: Martınez, M.
name: Masserot, A.
name: Meylahn, F.
name: Molenaar, M.
name: Mow-Lowry, C.
name: Mundet, J.
name: Munneke, B.
name: van Nieuwland, L.
name: Pacaud, E.
name: Pascucci, D.
name: Petit, S.
name: Van Ranst, Z.
name: Raskin, G.
name: Recaman, P. M.
name: van Remortel, N.
name: Rolland, L.
name: de Roo, L.
name: Roose, E.
name: Rosier, J. C.
name: Ryckbosch, D.
name: Schouteden, K.
name: Sevrin, A.
name: Sider, A.
name: Singha, A.
name: Spagnuolo, V.
name: Stahl, A.
name: Steinlechner, J.
name: Steinlechner, S.
name: Swinkels, B.
name: Szilasi, N.
name: Tacca, M.
name: Thienpont, H.
name: Vecchio, A.
name: Verkooijen, H.
name: Vermeer, C. H.
name: Vervaeke, M.
name: Visser, G.
name: Walet, R.
name: Werneke, P.
name: Westhofen, C.
name: Willke, B.
name: Xhahi, A.
name: Zhang, T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The third-generation of gravitational wave observatories, such as the Einstein Telescope (ET) and Cosmic Explorer (CE), aim for an improvement in sensitivity of at least a factor of ten over a wide frequency range compared to the current advanced detectors. In order to inform the design of the third-generation detectors and to develop and qualify their subsystems, dedicated test facilities are required. ETpathfinder prototype uses full interferometer configurations and aims to provide a high sensitivity facility in a similar environment as ET. Along with the interferometry at 1550 nm and silicon test masses, ETpathfinder will focus on cryogenic technologies, lasers and optics at 2090 nm and advanced quantum-noise reduction schemes. This paper analyses the underpinning noise contributions and combines them into full noise budgets of the two initially targeted configurations: 1) operating with 1550 nm laser light and at a temperature of 18 K and 2) operating at 2090 nm wavelength and a temperature of 123 K.