The thesis discusses the application of the concept of optical coherence to novel instrumentation dedicated to the study of CMB. The complex degree of mutual coherence is used to describe the performances of QUBIC (Q and U Bolometric Interferometer for Cosmology, http://www.qubic.org). An adding, single baseline, interferometer prototype, working in the WR10 waveguide band, has been tested to investigate the basic properties of mm-wavelength bolometric interferometry in a mm-wave laboratory. Moreover the performances of the optical combiner of the final instrument are investigated. The correct estimator (complex degree of mutual coherence) is defined and a simulation machine in ZEMAX to test systems is implemented and tested on a suitable system. Last part of the thesis focuses on the optical design of a Martin Pupplet Fourier transform spectrometer (where the complex degree of self coherence is measured) for the SAGACE ASI mission. A double coupled spectrometer is proposed, in order to increase its sensitivity compared to existing similar instruments, where half of the power is rejected.

(2010). The use of optical coherence for instrumentation devoted to CMB experiments. (Tesi di dottorato, Università degli Studi di Milano-Bicocca, 2010).

The use of optical coherence for instrumentation devoted to CMB experiments

SPINELLI, SEBASTIANO MAURO
2010-01-20

Abstract

The thesis discusses the application of the concept of optical coherence to novel instrumentation dedicated to the study of CMB. The complex degree of mutual coherence is used to describe the performances of QUBIC (Q and U Bolometric Interferometer for Cosmology, http://www.qubic.org). An adding, single baseline, interferometer prototype, working in the WR10 waveguide band, has been tested to investigate the basic properties of mm-wavelength bolometric interferometry in a mm-wave laboratory. Moreover the performances of the optical combiner of the final instrument are investigated. The correct estimator (complex degree of mutual coherence) is defined and a simulation machine in ZEMAX to test systems is implemented and tested on a suitable system. Last part of the thesis focuses on the optical design of a Martin Pupplet Fourier transform spectrometer (where the complex degree of self coherence is measured) for the SAGACE ASI mission. A double coupled spectrometer is proposed, in order to increase its sensitivity compared to existing similar instruments, where half of the power is rejected.
GERVASI, MASSIMO
Optics, Cosmic Microwave Background, Microwaves, Coherence, Instrumentation for Astronomy
FIS/05 - ASTRONOMIA E ASTROFISICA
English
Scuola di dottorato di Scienze
FISICA E ASTRONOMIA - 30R
22
2008/2009
(2010). The use of optical coherence for instrumentation devoted to CMB experiments. (Tesi di dottorato, Università degli Studi di Milano-Bicocca, 2010).
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/7884
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