Observation of mechanical Nyquist noise in a cryogenic gravitational-wave antenna

Details Observation of mechanical Nyquist noise in a cryogenic gravitational-wave antenna Observation of mechanical Nyquist noise in a cryogenic gravitational-wave antenna

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977phrvl..38..454b&link_type=abstract

Physical Review Letters, vol. 38, Feb. 28, 1977, p. 454-457.

Physics

12

Antenna Design, Gravitational Waves, Noise Measurement, Noise Reduction, Signal Detectors, Thermal Noise, Cryogenics, Noise Temperature, Pulsed Radiation, Vibration Mode

Scientific paper

A 680-kg, Weber-type, cylindrical, gravitational-wave detector has been operated at liquid helium temperature. The average vibrational energy in the lowest longitudinal mode at 1315.3 Hz was found to be consistent with the level of thermal noise at the antenna temperature. An effective noise temperature of 0.39 K for pulse excitation was measured. This is a factor of 20 below the lowest published values for room-temperature detectors.

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