Observation of Mechanical Nyquist Noise in a Cryogenic Gravitational-Wave Antenna
- 28 February 1977
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 38 (9) , 454-457
- https://doi.org/10.1103/physrevlett.38.454
Abstract
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.Keywords
This publication has 5 references indexed in Scilit:
- Ultimate sensitivity limit of a resonant gravitational wave antenna using a linear motion detectorPhysical Review D, 1976
- Superconducting tunable-diaphragm transducer for sensitive acceleration measurementsJournal of Applied Physics, 1976
- Two-Detector-Coincidence Search for Bursts of Gravitational RadiationPhysical Review Letters, 1975
- Results of the Munich-Frascati gravitational-wave experimentLettere al Nuovo Cimento (1971-1985), 1975
- Absence of Gravity-Wave Signals in a Bar at 1695 HzPhysical Review Letters, 1973