Development and test atT=4.2K of a capacitive resonant transducer for cryogenic gravitational-wave antennas View Full Text


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Article Info

DATE

1982-07

AUTHORS

P. Rapagnani

ABSTRACT

The characteristics of a new capacitive resonant transducer developed and tested on a small (M=11.2 kg) cryogenic gravitational-wave antenna at the liquid helium temperature are presented. The resonator frequency can be tuned within 0.1 Hz of the antenna frequency. The system has a mechanical merit factorQ≃5·105 and a ratio between the electrical energy in the transducer and the energy in the antenna β=3·10−3 atT=4.2 K. With these parameters, the transducer allows one to reach an effective noise temperatureTeff≃60 mK using a cooled FET preamplifier, and, if coupled to a r.f.-SQUID, allows one to reachTeff≃10 mK for the 5000 kg cryogenic gravitational-wave antenna of the Roma group at CERN (Geneva). More... »

PAGES

385-408

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02561646

DOI

http://dx.doi.org/10.1007/bf02561646

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1043530118


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