Sensitivity of the spherical gravitational wave detector MiniGRAIL operating at 5 K

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dc.creatorGottardi, L.
dc.creatorde Waard, A.
dc.creatorUsenko, A.
dc.creatorFrossati, G.
dc.creatorPodt, M.
dc.creatorFlokstra, J.
dc.creatorBassan, M.
dc.creatorFafone, V.
dc.creatorMinenkov, Y.
dc.creatorRocchi, A.
dc.date2007-05-01
dc.date.accessioned2026-07-07T10:59:52Z
dc.date.available2026-07-07T10:59:52Z
dc.descriptionWe present the performances and the strain sensitivity of the first spherical gravitational wave detector equipped with a capacitive transducer and read out by a low noise two-stage SQUID amplifier and operated at a temperature of 5 K. We characterized the detector performance in terms of thermal and electrical noise in the system output sygnal. We measured a peak strain sensitivity of $1.5\cdot 10^{-20} Hz^{-1/2}$ at 2942.9 Hz. A strain sensitivity of better than $5\cdot 10{-20}Hz{-1/2}$ has been obtained over a bandwidth of 30 Hz. We expect an improvement of more than one order of magnitude when the detector will operate at 50 mK. Our results represent the first step towards the development of an ultracryogenic omnidirectional detector sensitive to gravitational radiation in the 3kHz range.
dc.description8 pages, 5 figures, submitted to Physical Review D
dc.identifierhttps://arxiv.org/abs/0705.0122
dc.identifierhttp://arxiv.org/abs/0705.0122
dc.identifierPhys.Rev.D76:102005,2007
dc.identifierdoi:10.1103/PhysRevD.76.102005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/187552
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleSensitivity of the spherical gravitational wave detector MiniGRAIL operating at 5 K
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