Other
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ncimc...1..341a&link_type=abstract
Nuovo Cimento C, Serie 1, vol. 1C, July-Aug. 1978, p. 341-359. Research supported by the Universita di Roma and Consiglio Nazion
Other
5
Cryogenic Equipment, Gravitational Wave Antennas, Preamplifiers, Bars, Correlation, Data Acquisition, Field Effect Transistors, Noise Temperature
Scientific paper
New measurements obtained by means of a cryogenic gravitational-wave antenna of mass M equals 24.4 kg operated at T equals 4.5 and 1.5 K are reported. The operation was interrupted after 90 hours of data taking, mainly during successive nights, although the antenna could continue to function very satisfactorily for a much longer time. The rate of disturbances is so small that it can be easily eliminated by coincidences with other antennas. The overall effective temperature obtained with an appropriate data analysis algorithm at T equals 1.5 K is about 0.79 K. This value is mostly due to the noise temperature of the FET preamplifier which constitutes the main limiting factor to the sensitivity of present gravitational-wave resonant antennas.
Amaldi E.
Bonifazi P.
Bordoni Franco
Cosmelli Carlo
Ferrari Valeria
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