TheALTAIR cryogenic gravitational-wave experiment View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1992-11

AUTHORS

P. Bonifazi, M. Visco

ABSTRACT

We report on the experimental results obtained with the cryogenic Gravitational-Wave resonant detector ALTAIR located in Frascati (Italy) at the Istituto di Fisica dello Spazio Interplanetario of Consiglio Nazionale delle Ricerche. The peculiarity of this experiment is its working frequency. The first longitudinal mode of resonance of the antenna is at 1.8 kHz. The antenna, now equipped with a resonant capacitive transducer and a d.c. SQUID preamplifier, after a first test in November 1989, has operated almost continuously from May 1990. The best sensitivity, recently reached, expressed in terms of the effective noise temperatureTeff, is 20 mK, corresponding, for a short pulse of gravitational wave, to a metric perturbationh of 3 × 10-18. In the last period of measurements (from April 1991 to March 1992) two other antennas were operating: the Explorer antenna (2300 kg,T= 2.0 K) at CERN in Geneva and the LSU antenna (2500 kg,T = 4.2 K) at Louisiana State University in USA, both having a resonant frequency below 1 kHz. The data of these three detectors can be remote observed, in real time, by the international computer network. Coincidence analysis between the data of these three detectors is in progress. More... »

PAGES

943-954

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02506687

DOI

http://dx.doi.org/10.1007/bf02506687

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1020705901


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