caa a22 4500 445387483 CHVBK 20180317143036.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s10714-010-1037-x doi (NATIONALLICENCE)springer-10.1007/s10714-010-1037-x Cryogenics and Einstein Telescope [Elektronische Daten] [Paola Puppo, Fulvio Ricci] The dominant noises which limit the present sensitivity of the gravitational wave detectors are the thermal noise of the suspended mirrors and the shot noise. For the third generation of gravitational wave detectors as the Einstein Telescope (ET), the reduction of the shot noise implies to increase the power stored in the detector at 1MW level and, at the same time, to compensate the huge optic distortion due to induced thermal lensing. At low temperature it is possible to reduce both these effects. However, lowering the temperature of the test masses without injecting vibration noise from the cooling system is a technological challenge. We review here the thermal noise impact on the ultimate ET sensitivity limit and we discuss possible cryogenic configurations to cool the mirror. Springer Science+Business Media, LLC, 2010 Gravitational wave nationallicence Cryogenics nationallicence Puppo Paola Dipartimento di Fisica, Università di Roma La Sapienza, Rome, Italy aut Ricci Fulvio Dipartimento di Fisica, Università di Roma La Sapienza, Rome, Italy aut General Relativity and Gravitation Springer US; http://www.springer-ny.com 43/2(2011-02-01), 657-669 0001-7701 43:2<657 2011 43 10714 https://doi.org/10.1007/s10714-010-1037-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10714-010-1037-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Puppo Paola Dipartimento di Fisica, Università di Roma La Sapienza, Rome, Italy aut NATIONALLICENCE 700 1- Ricci Fulvio Dipartimento di Fisica, Università di Roma La Sapienza, Rome, Italy aut NATIONALLICENCE 773 0- General Relativity and Gravitation Springer US; http://www.springer-ny.com 43/2(2011-02-01), 657-669 0001-7701 43:2<657 2011 43 10714 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer