Summary
The detailed analysis of the behaviour of a gravitational-wave antenna coupled to a passive resonant transducer has been performed for short bursts of gravitational radiation. An expression for the noise temperature of the system is given for the general case of a transducer with resonant frequency and mechanical quality factor different from those of the antenna. The analysis of the optimum noise temperature obtainable for a given system shows that the optimum performance is obtained when the frequency of the transducer is slightly different from that of the antenna.
Riassunto
È stata effettuata un'analisi dettagliata del comportamento di un'antenna gravitazionale accoppiata ad un trasduttore risonante passivo, come rivelatori di brevi impulsi di radiazione gravitazionale. Si dà un'espressione per la temperatura di rumore del sistema nel caso generale di un trasduttore con frequenza di risonanza e fattore di qualità differenti da quelli dell'antenna. L'analisi della temperatura di rumore ottima mostra che la migliore prestazione del sistema si ottiene quando la frequenza del trasduttore è leggermente differente da quella dell'antenna.
Реуме
Проводится подробный анализ поведения антенны гравитационных волн, связанной с пассивным резонансным датчиком, для коротких вспышек гравитационного излучения. Прииводится выражение для температуры шума системы в обшем случае датчика с резонансной частотой и коэффициентном механической добротности, отличным от коэффициента для антенны. Анализ оптимальной температуры шума, проведенный для данной системы, показывает, что оптимальная ситуация получается, когда частота датчика несколько отличается от частоты антенны.
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The main point of this paper has been presented byC. Cosmelli at theSecond Workshop on Precision Measurements on Relativistic Effects in Astrophysical Systems, held in Rome, 11–13 July 1983.
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Castellano, M.G., Cosmelli, C. Sensitivity improvement of a two-mode gravitational-radiation detector through the use of a transducer not perfectly tuned to the antenna. Il Nuovo Cimento C 7, 9–20 (1984). https://doi.org/10.1007/BF02507193
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DOI: https://doi.org/10.1007/BF02507193