massimo mazzoni - Academia.edu (original) (raw)

Uploads

Papers by massimo mazzoni

The knowledge of the noise Power Spectral Density of interferometric detector of gravitational wa... more The knowledge of the noise Power Spectral Density of interferometric detector of gravitational waves is fundamental for detection algorithms and for the analysis of the data. In this paper we address both to the problem of identifying the noise Power Spectral Density of interferometric detectors by parametric techniques and to the problem of the whitening procedure of the sequence of data. We will concentrate the study on a Power Spectral Density like the one of the Italian-French detector VIRGO and we show that with a reasonable finite number of parameters we succeed in modeling a spectrum like the theoretical one of VIRGO, reproducing all its features. We propose also the use of adaptive techniques to identify and to whiten on line the data of interferometric detectors. We analyze the behavior of the adaptive techniques in the field of stochastic gradient and in the Least Squares ones. As a result, we find that the Least Squares Lattice filter is the best among those we have analy...

The knowledge of the noise Power Spectral Density of interferometric detector of gravitational wa... more The knowledge of the noise Power Spectral Density of interferometric detector of gravitational waves is fundamental for detection algorithms and for the analysis of the data. In this paper we address both to the problem of identifying the noise Power Spectral Density of interferometric detectors by parametric techniques and to the problem of the whitening procedure of the sequence of data. We will concentrate the study on a Power Spectral Density like the one of the Italian-French detector VIRGO and we show that with a reasonable number of parameters we succeed in modeling a spectrum like the theoretical one of VIRGO, reproducing all its features. We propose also the use of adaptive techniques to identify and to whiten on line the data of interferometric detectors. We analyze the behavior of the adaptive techniques in the field of stochastic gradient and in the Least Squares ones. As a result, we find that the Least Squares Lattice filter is the best among those we have analyzed. It...

Revista De Historia Industrial, 2007

Lo hechos, como escribió Werner Sombart, son como las perlas: precisan de un hilo que los enlace.... more Lo hechos, como escribió Werner Sombart, son como las perlas: precisan de un hilo que los enlace. La reconstrucción histórica de los hechos del pasado necesita una idea unificadora, un modelo. Tradicionalmente en Europa, y sobre todo en el continente, si se exceptúa a la escuela histórica de los economistas alemanes del ochocientos, los historiadores económicos se han demostrado menos equipados a nivel teórico que sus colegas anglosajones. El método europeo-continental de hacer historia económica sin prestar la debida atención a las exigencias de un subyacente modelo y sin explicitar la teoría utilizada, ha estimulado Inglaterra, Escocia y, sobre todo, Estados Unidos, a tratar el problema de la reconstrucción histórica de manera diametralmente opuesta: a partir de los años sesenta, los estudiosos anglosajones han empezado a abordar los temas de historia económica a partir de un nuevo planteamiento, en el que la premisa de cada estudio es la formulación inicial, en forma algebraico-geométrica, del modelo teórico explicativo adoptado. Objetivo de la reconstrucción de los hechos es el de averiguar la validez de este modelo a partir de documentos principalmente de tipo estadístico. Este planteamiento ha puesto de manifiesto las deficiencias teórico-económicas de la historiografía económica tradicional del continente europeo, pero, al mismo tiempo, ha acabado por ir demasiado lejos. Los modelos económicos, con su esprit de géométrie, amenazan con deformar la experiencia

Proceedings of SPIE - The International Society for Optical Engineering, 2004

The goal of the VIRGO program is to build a giant Michelson type interferometer (3 kilometer long... more The goal of the VIRGO program is to build a giant Michelson type interferometer (3 kilometer long arms) to detect gravitational waves. Large optical components (350 mm in diameter), having extremely low loss at 1064 nm, are needed. Today, the Ion beam Sputtering is the only deposition technique able to produce optical components with such performances. Consequently, a large ion beam sputtering deposition system was built to coat large optics up to 700 mm in diameter. The performances of this coater are described in term of layer uniformity on large scale and optical losses (absorption and scattering characterization). The VIRGO interferometer needs six main mirrors. The first set was ready in June 2002 and its installation is in progress on the VIRGO site (Italy). The optical performances of this first set are discussed. The requirements at 1064 nm are all satisfied. Indeed, the absorption level is close to 1 ppm (part per million), the scattering is lower than 5 ppm and the R.M.S. wavefront of these optics is lower than 8 nm on 150 mm in diameter. Finally, some solutions are proposed to further improve these performances, especially the absorption level (lower than 0.1 ppm) and the mechanical quality factor Q of the mirrors (thermal noise reduction).

Solar Physics, 1986

The experimentally known energies of the 1s22s → 1s2s(1S, 3S)3p transitions are considered for li... more The experimentally known energies of the 1s22s → 1s2s(1S, 3S)3p transitions are considered for lithium to calcium. Their differences from the corresponding He-like resonances are fitted to the atomic number by means of a polynomial function and, through interpolation, the wavelengths for nitrogen to sodium are calculated.

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2002

The Linear Variable Differential Transformer (LVDT) position sensor For Gravitational Wave Interf... more The Linear Variable Differential Transformer (LVDT) position sensor For Gravitational Wave Interferometer low-frequency controls. HareemTariq (a,b) , Akiteru Takamori (a,c) , Flavio Vetrano (f,j) , Chenyang Wang (a) , Alessandro Bertolini (a,g) , Giovanni Calamai (f,i) , Riccardo DeSalvo (a) , Alberto Gennai (d) , Lee Holloway (e,d) , Giovanni Losurdo (f) , Szabolcs Márka (a) , Massimo Mazzoni (f,h) , Federico Paoletti (d) , Diego Passuello (d) , Virginio Sannibale (a) , Ruggero Stanga (f,h) .

IEEE Transactions on Instrumentation and Measurement, 2006

The gravitational wave detector Virgo is presently being commissioned. A significant part of last... more The gravitational wave detector Virgo is presently being commissioned. A significant part of last year was spent in setting up the cavity length control system. This work was carried out with steps of increasing complexity: locking a simple Fabry-Perot cavity, then a Michelson interferometer with Fabry-Perot cavities in both arms, and finally recycling the light beam into the interferometer. The applied strategy and the main results obtained are described.

Classical and Quantum Gravity, 2001

The knowledge of the noise power spectral density of an interferometric detector of gravitational... more The knowledge of the noise power spectral density of an interferometric detector of gravitational waves is fundamental for detection algorithms and for the analysis of the data. In this paper we address both the problem of identifying the noise power spectral density of interferometric detectors by parametric techniques and the problem of the whitening procedure of the sequence of data. We will concentrate the study on a power spectral density like that of the Italian-French detector VIRGO and we show that with a reasonable number of parameters we succeed in modelling a spectrum like the theoretical one of VIRGO, reproducing all of its features. We also propose the use of adaptive techniques to identify and to whiten the data of interferometric detectors on-line. We analyse the behaviour of the adaptive techniques in the field of stochastic gradient and in the least-squares filters. As a result, we find that the least-squares lattice filter is the best among those we have analysed. It succeeds optimally in following all the peaks of the noise power spectrum, and one of its outputs is the whitened part of the spectrum. Besides, the fast convergence of this algorithm, it lets us follow the slow non-stationarity of the noise. These procedures could be used to whiten the overall power spectrum or only some region of it. The advantage of the techniques we propose is that they do not require a priori knowledge of the noise power spectrum to be analysed. Moreover, the adaptive techniques let us identify and remove the spectral line, without building any physical model of the source that produced it.

Applied Optics, 2007

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt età la diffusion de documents scientifiques de niveau recherche, publiés ou non, emanant desétablissements d'enseignement et de recherche français ouétrangers, des laboratoires publics ou privés.

The knowledge of the noise Power Spectral Density of interferometric detector of gravitational wa... more The knowledge of the noise Power Spectral Density of interferometric detector of gravitational waves is fundamental for detection algorithms and for the analysis of the data. In this paper we address both to the problem of identifying the noise Power Spectral Density of interferometric detectors by parametric techniques and to the problem of the whitening procedure of the sequence of data. We will concentrate the study on a Power Spectral Density like the one of the Italian-French detector VIRGO and we show that with a reasonable finite number of parameters we succeed in modeling a spectrum like the theoretical one of VIRGO, reproducing all its features. We propose also the use of adaptive techniques to identify and to whiten on line the data of interferometric detectors. We analyze the behavior of the adaptive techniques in the field of stochastic gradient and in the Least Squares ones. As a result, we find that the Least Squares Lattice filter is the best among those we have analy...

The knowledge of the noise Power Spectral Density of interferometric detector of gravitational wa... more The knowledge of the noise Power Spectral Density of interferometric detector of gravitational waves is fundamental for detection algorithms and for the analysis of the data. In this paper we address both to the problem of identifying the noise Power Spectral Density of interferometric detectors by parametric techniques and to the problem of the whitening procedure of the sequence of data. We will concentrate the study on a Power Spectral Density like the one of the Italian-French detector VIRGO and we show that with a reasonable number of parameters we succeed in modeling a spectrum like the theoretical one of VIRGO, reproducing all its features. We propose also the use of adaptive techniques to identify and to whiten on line the data of interferometric detectors. We analyze the behavior of the adaptive techniques in the field of stochastic gradient and in the Least Squares ones. As a result, we find that the Least Squares Lattice filter is the best among those we have analyzed. It...

Revista De Historia Industrial, 2007

Lo hechos, como escribió Werner Sombart, son como las perlas: precisan de un hilo que los enlace.... more Lo hechos, como escribió Werner Sombart, son como las perlas: precisan de un hilo que los enlace. La reconstrucción histórica de los hechos del pasado necesita una idea unificadora, un modelo. Tradicionalmente en Europa, y sobre todo en el continente, si se exceptúa a la escuela histórica de los economistas alemanes del ochocientos, los historiadores económicos se han demostrado menos equipados a nivel teórico que sus colegas anglosajones. El método europeo-continental de hacer historia económica sin prestar la debida atención a las exigencias de un subyacente modelo y sin explicitar la teoría utilizada, ha estimulado Inglaterra, Escocia y, sobre todo, Estados Unidos, a tratar el problema de la reconstrucción histórica de manera diametralmente opuesta: a partir de los años sesenta, los estudiosos anglosajones han empezado a abordar los temas de historia económica a partir de un nuevo planteamiento, en el que la premisa de cada estudio es la formulación inicial, en forma algebraico-geométrica, del modelo teórico explicativo adoptado. Objetivo de la reconstrucción de los hechos es el de averiguar la validez de este modelo a partir de documentos principalmente de tipo estadístico. Este planteamiento ha puesto de manifiesto las deficiencias teórico-económicas de la historiografía económica tradicional del continente europeo, pero, al mismo tiempo, ha acabado por ir demasiado lejos. Los modelos económicos, con su esprit de géométrie, amenazan con deformar la experiencia

Proceedings of SPIE - The International Society for Optical Engineering, 2004

The goal of the VIRGO program is to build a giant Michelson type interferometer (3 kilometer long... more The goal of the VIRGO program is to build a giant Michelson type interferometer (3 kilometer long arms) to detect gravitational waves. Large optical components (350 mm in diameter), having extremely low loss at 1064 nm, are needed. Today, the Ion beam Sputtering is the only deposition technique able to produce optical components with such performances. Consequently, a large ion beam sputtering deposition system was built to coat large optics up to 700 mm in diameter. The performances of this coater are described in term of layer uniformity on large scale and optical losses (absorption and scattering characterization). The VIRGO interferometer needs six main mirrors. The first set was ready in June 2002 and its installation is in progress on the VIRGO site (Italy). The optical performances of this first set are discussed. The requirements at 1064 nm are all satisfied. Indeed, the absorption level is close to 1 ppm (part per million), the scattering is lower than 5 ppm and the R.M.S. wavefront of these optics is lower than 8 nm on 150 mm in diameter. Finally, some solutions are proposed to further improve these performances, especially the absorption level (lower than 0.1 ppm) and the mechanical quality factor Q of the mirrors (thermal noise reduction).

Solar Physics, 1986

The experimentally known energies of the 1s22s → 1s2s(1S, 3S)3p transitions are considered for li... more The experimentally known energies of the 1s22s → 1s2s(1S, 3S)3p transitions are considered for lithium to calcium. Their differences from the corresponding He-like resonances are fitted to the atomic number by means of a polynomial function and, through interpolation, the wavelengths for nitrogen to sodium are calculated.

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2002

The Linear Variable Differential Transformer (LVDT) position sensor For Gravitational Wave Interf... more The Linear Variable Differential Transformer (LVDT) position sensor For Gravitational Wave Interferometer low-frequency controls. HareemTariq (a,b) , Akiteru Takamori (a,c) , Flavio Vetrano (f,j) , Chenyang Wang (a) , Alessandro Bertolini (a,g) , Giovanni Calamai (f,i) , Riccardo DeSalvo (a) , Alberto Gennai (d) , Lee Holloway (e,d) , Giovanni Losurdo (f) , Szabolcs Márka (a) , Massimo Mazzoni (f,h) , Federico Paoletti (d) , Diego Passuello (d) , Virginio Sannibale (a) , Ruggero Stanga (f,h) .

IEEE Transactions on Instrumentation and Measurement, 2006

The gravitational wave detector Virgo is presently being commissioned. A significant part of last... more The gravitational wave detector Virgo is presently being commissioned. A significant part of last year was spent in setting up the cavity length control system. This work was carried out with steps of increasing complexity: locking a simple Fabry-Perot cavity, then a Michelson interferometer with Fabry-Perot cavities in both arms, and finally recycling the light beam into the interferometer. The applied strategy and the main results obtained are described.

Classical and Quantum Gravity, 2001

The knowledge of the noise power spectral density of an interferometric detector of gravitational... more The knowledge of the noise power spectral density of an interferometric detector of gravitational waves is fundamental for detection algorithms and for the analysis of the data. In this paper we address both the problem of identifying the noise power spectral density of interferometric detectors by parametric techniques and the problem of the whitening procedure of the sequence of data. We will concentrate the study on a power spectral density like that of the Italian-French detector VIRGO and we show that with a reasonable number of parameters we succeed in modelling a spectrum like the theoretical one of VIRGO, reproducing all of its features. We also propose the use of adaptive techniques to identify and to whiten the data of interferometric detectors on-line. We analyse the behaviour of the adaptive techniques in the field of stochastic gradient and in the least-squares filters. As a result, we find that the least-squares lattice filter is the best among those we have analysed. It succeeds optimally in following all the peaks of the noise power spectrum, and one of its outputs is the whitened part of the spectrum. Besides, the fast convergence of this algorithm, it lets us follow the slow non-stationarity of the noise. These procedures could be used to whiten the overall power spectrum or only some region of it. The advantage of the techniques we propose is that they do not require a priori knowledge of the noise power spectrum to be analysed. Moreover, the adaptive techniques let us identify and remove the spectral line, without building any physical model of the source that produced it.

Applied Optics, 2007

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt età la diffusion de documents scientifiques de niveau recherche, publiés ou non, emanant desétablissements d'enseignement et de recherche français ouétrangers, des laboratoires publics ou privés.