Dr. Enrico Verroi Profile

Dr. Enrico Verroi

Research Fellow at Univ degli Studi di Trento

SPIE Involvement:

Author

Publications (14)

Proceedings Article | 13 December 2020 Poster + Paper

A summary on an investigation of GAGG:Ce afterglow emission in the context of future space applications within the HERMES nanosatellite mission

Riccardo Campana, Nicola Zampa, Fabio Fuschino, Giovanni Pauletta, Irina Rashevskaya, Filippo Ambrosino, Marco Baruzzo, Diego Cauz, Daniela Cirrincione, Marco Citossi, Giovanni Della Casa, Benedetto Di Ruzza, Gábor Galgóczi, Claudio Labanti, Yuri Evangelista, Jakub Ripa, Andrea Vacchi, Fabrizio Fiore, Giuseppe Dilillo, Francesco Tommasino, Enrico Verroi

Proceedings Volume 11444, 1144493 (2020) https://doi.org/10.1117/12.2561053

KEYWORDS: Tolerancing, Sensors, Crystals, Gamma radiation, Atmospheric particles, Satellites, Gadolinium, Aluminum, Gallium, Garnet

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Proceedings Article | 17 November 2017 Open Access

METIS-ESA solar orbiter mission internal straylight analysis

E. Verroi, G. Naletto, S. Fineschi, E. Antonucci, V. Da Deppo

Proceedings Volume 10563, 105631N (2017) https://doi.org/10.1117/12.2304231

KEYWORDS: Stray light, Sensors, Ultraviolet radiation, Sun, Scattering, Visible radiation, Light scattering, Coronagraphy, Ray tracing, Astronomical imaging

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METIS is the Multi Element Telescope for Imaging and Spectroscopy for the ESA Solar Orbiter. Its target is the solar corona from a near-Sun orbit in two different spectral bands: the HI UV narrow band at 121.6 nm, and the VL visible light band. METIS adopts a novel inverted externally occulted configuration, where the disk light is shielded by an annular occulter, and an annular aspherical mirror M1 collects the signal coming from the corona. After M1 the coronal light passes through an internal occulter and is then reflected by a second annular mirror M2 toward a narrow filter for the 121.6 nm HI line selection. The visible light reflected by the filter is used to feed a visible light (580 − 640 nm) polarimetric channel. The photospheric light passing through the entrance aperture is back-rejected by a spherical rejection mirror.

Since the coronal light is enormously fainter than the photospheric one, a very tough suppression is needed for the internal stray light, in particular the requirement for the stray light suppression is more stringent in the VL than in the UV, because the emission of the corona with respect to the disk emission is different in the two cases, and the requirements are a suppression of at least 10^-9 times for the VL and a suppression of at least 10^-7 times for the UV channel.

This paper presents the stray light analysis for this new coronographic configuration.

The complexity of the optomechanical design of METIS, combined with the faintness of the coronal light with respect to the solar disk noise, make a standard ray tracing approach not feasible because it is not sufficient to stop at the first generation of scattered rays in order to check the requirements. Also scattered rays down to the fourth generation must be treated as sources of new scattering light, to analyze the required level of accuracy. If used in a standard ray tracing scattering analysis, this approach is absolutely beyond the computational capabilities today available; therefore we opted for a scattering ray generation with a Montecarlo method in which after a father ray hits a surface, only one ray is generated, randomly selected according to the distribution of the transmitted energy. These rays bring with them all the energy that is otherwise distributed between all the rays of second generation, making the model more realistic and avoiding loss of energy due to the rays sampling. The stray light has been studied in function of the mechanical roughness of the surfaces and the obtained results indicate an instrument stray light blocking performance well within the requirements in both channels.

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Proceedings Article | 13 September 2016 Presentation + Paper

A 3.9 km baseline intensity interferometry photon counting experiment

Luca Zampieri, Cesare Barbieri, Mauro Barbieri, Enrico Verroi, Gabriele Umbriaco, Paolo Favazza, Luigi Lessio, Giancarlo Farisato, Giampiero Naletto

Proceedings Volume 9980, 99800G (2016) https://doi.org/10.1117/12.2236664

KEYWORDS: Telescopes, Interferometry, Photon counting, Photometry, Sensors, Picosecond phenomena, Stars, Signal detection, Error analysis, Wavefronts

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Proceedings Article | 8 August 2016 Paper

Intensity interferometry with Aqueye+ and Iqueye in Asiago

Luca Zampieri, Giampiero Naletto, Cesare Barbieri, Mauro Barbieri, Gabriele Umbriaco, Luigi Lessio, Enrico Verroi, Paolo Favazza, Giancarlo Farisato

Proceedings Volume 9907, 99070N (2016) https://doi.org/10.1117/12.2233688

KEYWORDS: Telescopes, Interferometry, Optical fibers, Astronomy, Picosecond phenomena, Stars, Sensors, Interferometers, Cameras, Mirrors

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Proceedings Article | 25 September 2015 Paper

Stray-light analyses of the METIS coronagraph on Solar Orbiter

P. Sandri, F. Landini, V. DaDeppo, F. Frassetto, G. Naletto, D. Morea, D. Spadaro, S. Fineschi, M. Romoli, E. Antonucci, V. Andretta, E. Verroi

Proceedings Volume 9604, 96040K (2015) https://doi.org/10.1117/12.2203629

KEYWORDS: Ultraviolet radiation, Sensors, Mirrors, Telescopes, Information operations, Diffraction, Coronagraphy, Zemax, Sun, Space telescopes

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Proceedings Article | 6 May 2015 Paper

Aqueye+: a new ultrafast single photon counter for optical high time resolution astrophysics

L. Zampieri, Cesare Barbieri, Mauro Barbieri, Giampiero Naletto, Enrico Verroi, M. D'Alessandro, A. Di Paola, G. Farisato, P. Zoccarato, G. Ceribella

Proceedings Volume 9504, 95040C (2015) https://doi.org/10.1117/12.2179547

KEYWORDS: Cameras, Telescopes, Stars, Asteroids, Radio optics, Single photon, Astronomy, Calibration, Photometry, Astronomical imaging

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Proceedings Article | 26 September 2013 Paper

Aqueye+: a wavefront sensorless adaptive optics system for narrow field coronagraphy

Mirco Zaccariotto, Luca Brugiolo, Francesco Ricci, Filippo Romanato, Michele Gintoli, Fabio Frassetto, Andrea Cardullo, Luca Zampieri, Enrico Verroi, Tommaso Occhipinti, Ivan Capraro, Giampiero Naletto, Cesare Barbieri

Proceedings Volume 8864, 88641W (2013) https://doi.org/10.1117/12.2023907

KEYWORDS: Adaptive optics, Coronagraphy, Sensors, Telescopes, Stars, Light, Spiral phase plates, Photometry, Mirrors, Deformable mirrors

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Proceedings Article | 26 September 2013 Paper

Aqueye Plus: a very fast single photon counter for astronomical photometry to quantum limits equipped with an Optical Vortex coronagraph

Cesare Barbieri, Mirco Zaccariotto, Elettra Mari, Enrico Verroi, Luca Zampieri, Tommaso Occhipinti, Filippo Romanato, Anna Sponselli, Ivan Capraro, Andrea Cardullo, Mauro Barbieri, Giampiero Naletto

Proceedings Volume 8875, 88750D (2013) https://doi.org/10.1117/12.2022571

KEYWORDS: Spiral phase plates, Photometry, Coronagraphy, Telescopes, Single photon, Astronomy, Stars, Optical vortices, Deformable mirrors, Data transmission

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Proceedings Article | 21 September 2012 Paper

Preliminary internal straylight analysis of the METIS instrument for the Solar Orbiter ESA mission

Vania Da Deppo, Silvano Fineschi, Giampiero Naletto, Enrico Verroi, Ester Antonucci

Proceedings Volume 8442, 84424N (2012) https://doi.org/10.1117/12.926485

KEYWORDS: Coronagraphy, Ultraviolet radiation, Sensors, Sun, Stray light, Solar processes, Ray tracing, Extreme ultraviolet, Visible radiation, Imaging spectroscopy

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Proceedings Article | 20 July 2010 Paper

Upgrade of Iqueye, a novel photon-counting photometer for the ESO New Technology Telescope

S. Gradari, V. Da Deppo, G. Naletto, T. Occhipinti, P. Zoccarato, E. Verroi, C. Facchinetti, I. Capraro, C. Barbieri

Proceedings Volume 7735, 773545 (2010) https://doi.org/10.1117/12.858185

KEYWORDS: Telescopes, Picosecond phenomena, Photometry, Sensors, Astronomy, Optical filters, Mirrors, Space telescopes, Optical design, Optical benches

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Proceedings Article | 28 April 2010 Paper

Iqueye: a single-photon counting very high-speed photometer for the ESO 3.5m NTT

T. Occhipinti, V. Da Deppo, E. Verroi, C. Facchinetti, M. Zaccariotto, P. Zoccarato, M. Belluso, G. Naletto, G. Bonanno, F. Messina, L. Zampieri, C. Germana, S. Billotta, A. Di Paola, S. Gradari, C. Barbieri, E. Giro, M. Barbieri, C. Pernechele, P. Bolli, I. Capraro

Proceedings Volume 7681, 768110 (2010) https://doi.org/10.1117/12.850659

KEYWORDS: Photometry, Picosecond phenomena, Telescopes, Sensors, Astronomy, Rubidium, Oscillators, Space telescopes, Global Positioning System, Receivers

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Proceedings Article | 17 April 2010 Paper

Quantum astronomy with Iqueye

I. Capraro, P. Zoccarato, E. Verroi, G. Naletto, C. Barbieri, T. Occhipinti, S. Gradari

Proceedings Volume 7702, 77020M (2010) https://doi.org/10.1117/12.849542

KEYWORDS: Telescopes, Stars, Picosecond phenomena, Astronomy, Correlation function, Optical correlators, Sensors, Space telescopes, Photon counting, Interferometers

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Proceedings Article | 18 May 2009 Paper

Very fast photon counting photometers for astronomical applications: IquEYE for the ESO 3.5m New Technology Telescope

Claudio Pernechele, Marco Parrozzani, Pietro Bolli, Giovanni Bonanno, Ivan Capraro, Claudia Facchinetti, Andrea Di Paola, Andrea Possenti, Cesare Barbieri, Enrico Giro, Luca Zampieri, Enrico Verroi, Andrej Cadez, Mirco Zaccariotto, Giampiero Naletto, Tommaso Occhipinti, Gabriele Anzolin, Claudio Germanà, Fabrizio Tamburini, Sergio Billotta, Paolo Zoccarato

Proceedings Volume 7355, 73550R (2009) https://doi.org/10.1117/12.821626

KEYWORDS: Telescopes, Astronomy, Rubidium, Photon counting, Photometry, Sensors, Astronomical telescopes, Space telescopes, Picosecond phenomena

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