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Pizzella, Alvise (2018) A homodyne quadrature interferometer for the study of thermal noise in solids in non-equilibrium steady states. [Magistrali biennali]

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Abstract

Non equilibrium thermal noise is expected to be a limiting factor in the future generation of gravitational waves interferometers. Nevertheless is still a marginally investigated phenomenon and its understanding would strongly improve the design of future interferometers. In collaboration with the VIRGO experiment, a homodyne interferometric readout was realized using the quadrature technique in order to be sensible to displacements longer than one laser-source wavelength. The interferometer was designed and characterized, reaching a ~3e-15 m/vHz at 1400 Hz sensitivity, enough to measure the mean-square excitations of an oscillator’s acoustic modes induced by thermal noise in non-equilibrium conditions.

Item Type:Magistrali biennali
Uncontrolled Keywords:gravitational waves, thermal noise, interferometry, quadrature, interferometer
Subjects:Area 02 - Scienze fisiche > FIS/01 Fisica sperimentale
Codice ID:62431
Relatore:Ciani, Giacomo
Correlatore:Conti, Livia
Data della tesi:October 2018
Biblioteca:Polo di Scienze > Dip. Fisica e Astronomia "Galileo Galilei" - Biblioteca
Tipo di fruizione per il documento:on-line per i full-text
Tesi sperimentale (Si) o compilativa (No)?:Yes

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