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

Giuseppe Dilillo, 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, Francesco Tommasino, Enrico Verroi, Fabrizio Fiore

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

Read Abstract +

Proceedings Article | 17 November 2017 Open Access

METIS-ESA solar orbiter mission internal straylight analysis

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

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

Read Abstract +

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.

DOWNLOAD PAPER

Proceedings Article | 13 September 2016 Presentation + Paper

A 3.9 km baseline intensity interferometry photon counting experiment

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

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

Read Abstract +

Proceedings Article | 8 August 2016 Paper

Intensity interferometry with Aqueye+ and Iqueye in Asiago

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

Read Abstract +

Proceedings Article | 25 September 2015 Paper

Stray-light analyses of the METIS coronagraph on Solar Orbiter

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

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

Read Abstract +

Proceedings Article | 6 May 2015 Paper

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

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

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

Read Abstract +

Proceedings Article | 26 September 2013 Paper

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

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

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

Read Abstract +

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

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

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

Read Abstract +

Proceedings Article | 21 September 2012 Paper

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

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

Read Abstract +

Proceedings Article | 20 July 2010 Paper

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

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

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

Read Abstract +

Proceedings Article | 28 April 2010 Paper

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

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

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

Read Abstract +

Proceedings Article | 17 April 2010 Paper

Quantum astronomy with Iqueye

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

Read Abstract +

Proceedings Article | 18 May 2009 Paper

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

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

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

Read Abstract +