A5033403389- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Advanced Optical Sensing Technologies
- Astrophysics and Cosmic Phenomena
- CCD and CMOS Imaging Sensors
- Radio Astronomy Observations and Technology
- Particle physics theoretical and experimental studies
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Adaptive optics and wavefront sensing
- Dark Matter and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Advanced Fluorescence Microscopy Techniques
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Antenna Design and Optimization
- Photonic and Optical Devices
- Integrated Circuits and Semiconductor Failure Analysis
- Microwave Engineering and Waveguides
- Advanced Semiconductor Detectors and Materials
- Spectroscopy and Laser Applications
- Ionosphere and magnetosphere dynamics
- Muon and positron interactions and applications
- Photocathodes and Microchannel Plates
- Semiconductor materials and interfaces
Osservatorio Astrofisico di Catania
2009-2023
National Institute for Astrophysics
2004-2023
Campbell Collaboration
2013
Institute for Space Astrophysics and Planetology
2013
Argonne National Laboratory
2013
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2011
Osservatorio Astronomico di Cagliari
2009
STMicroelectronics (Italy)
2008
Ground-based gamma-ray astronomy has had a major breakthrough with the impressive results obtained using systems of imaging atmospheric Cherenkov telescopes. huge potential in astrophysics, particle physics and cosmology. CTA is an international initiative to build next generation instrument, factor 5-10 improvement sensitivity 100 GeV 10 TeV range extension energies well below above TeV. will consist two arrays (one north, one south) for full sky coverage be operated as open observatory....
In this paper we present the results of first electrical and optical characterization performed on 1 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> total area Silicon Photomultipliers (SiPM) fabricated in standard silicon planar technology at STMicroelectronics Catania R&D clean room facility. The device consists 289 microcells has a geometrical fill factor 48%. Breakdown voltage, gain, dark noise rate, crosstalk, photon detection...
The present work aims to address a comprehensive analytical analysis of new accurate equivalent electrical model silicon photomultiplier (SiPM) detectors. proposed circuit allows truthfully reproduce the output signal waveform generated by light sensors apart from specific technology adopted for fabrication process, and can also be profitably exploited perform reliable circuit-level simulations. A detailed in-depth investigation functional parameters involved in pulse signals is here...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Solid state single photon detectors are an emerging issue, with applications in the wide field of sensors and transducers. A new kind device named Silicon Photomultiplier (SiPM) shows timing charge resolution features that some respect could even replace traditional photomultiplier tubes. In this paper we illustrate a complete method for evaluation gain, dark noise, afterpulsing, cross-talk...
<i>Context. <i/>A new extremely high speed photon-counting photometer, Iqueye, has been installed and tested at the New Technology Telescope, in La Silla.<i>Aims. <i/>This instrument is second prototype of a "quantum" photometer being developed for future Extremely Large Telescopes 30–50 m aperture.<i>Methods. <i/>Iqueye divides telescope aperture into four portions, each feeding single photon avalanche diode. The counts from channels are collected by time-to-digital converter board, where...
In this paper, we present the results of charge and time characterization performed on our novel 100-channel silicon photomultiplier. We have improved previous single-photon-avalanche-diode technology in order to set up a working device with outstanding features terms single-photon resolving power <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">R</i> = 45, timing resolution down 100 ps, photon-detection efficiency 14% at 420 nm. Tests were...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> In this paper, we present the results of first noise characterization performed on our novel 100-channel silicon photomultiplier. We have improved previous single-photon avalanche photodiode technology in order to set up a working device with outstanding features terms resolving power <formula formulatype="inline"><tex Notation="TeX">$R = \hbox{45}$</tex></formula>, timing resolution down 100 ps,...
In this paper, the development of dual mirror Small Size Telescopes (SST) for Cherenkov Telescope Array (CTA) is reviewed. Up to 70 SST, with a primary diameter 4 m, will be produced and installed at CTA southern site. These allow investigation gamma-ray sky highest energies accessible CTA, in range from about 1 TeV 300 TeV. The telescope presented contribution characterized by two major innovations: use Schwarzschild-Couder configuration an innovative camera using as sensors either...
In the context of Cherenkov Telescope Array observatory project, ASTRI SST-2M end-to-end prototype telescope, entirely supported by Italian National Institute Astrophysics, is designed to detect cosmic primary gamma ray energies from few TeV up hundreds TeV. The camera part challenging synergy novel optical design, sensors, front-end electronics and telescope structure design. devoted imaging recording images air showers induced particles into Earth's atmosphere. order match energy range...
This paper describes the results obtained so far with AquEYE, a single photon counting, fixed aperture photometer for Asiago 182 cm telescope. AquEYE has been conceived as prototype of truly 'quantum' future Extremely Large Telescopes 30–50 m aperture. is characterized by four independent channels equipped avalanche diodes (SPADs) detectors. The counts from are acquired TDC board which nominal 25 ps time tagging capability. Taking into account 35 jitter in SPAD itself, overall precision tags...
The Muon Portal is a recently born project that plans to build large area muon detector for noninvasive inspection of shipping containers in the ports, searching presence potential fissile (U, Pu) threats. technique employed by well-known tomography, based on cosmic scattering from high-Z materials. design and operational parameters portal under construction will be described this paper, together with preliminary simulation test results.
A comprehensive and in-depth characterization procedure for obtaining very accurate measurements on silicon photomultiplier (SiPM) detectors is described here. large amount of electro-optical tests are systematically carried out in terms the most significant SiPM performance parameters; particular, an estimation photon detection efficiency achieved, based single-photon counting technique, with substraction dark noise contribution avoiding additional sources crosstalk after pulsing. Some...
Using data acquired during an observational campaign carried out at the THEMIS telescope in IPM mode, coordinated with other ground- and space-based instruments (IOACT, TRACE, EIT/SOHO, MDI/SOHO), we have analyzed first evolutionary phases of a recurrent active region (NOAA 10050), order to study morphology dynamics its magnetic structures their emergence early development. The main result obtained from this analysis concerns dynamic evolution arch filament system (AFS) crossing polarity...
The fabrication of silicon shallow junction photodiodes is a relevant topic for the detection blue and near ultraviolet weak photon fluxes. In this paper we present simple model to calculate quantum efficiency (QDE) Geiger mode avalanche photodiode (GMAP) as function dead layer thickness above depletion layer. A comparison between calculated experimental data also presented. Moreover, by using same model, an analysis QDE at 420 nm wavelength conventional GMAPs based on N <sup...
A comprehensive and in-depth characterization procedure for obtaining very accurate measurements on silicon photomultiplier detectors (SiPMs) is here described. large amount of optical tests are systematically carried out discussed in terms the most important SiPM performance parameters; particular, an estimation photon detection efficiency 350-900-nm wavelength spectral range steps 10 nm achieved, based single-photon counting technique, with substraction dark noise contribution avoiding...
Following our previous work which has led us to fabricate single pixels of geiger mode avalanche photodiodes (GMAPs), we present in this letter the results regarding fabrication and characterization a bidimensional array GMAPs. Low dark count rates very good uniformity over sensor are reported. High quantum efficiency visible range been measured. Measurements indicate that not all nominal active area is effectively sensitive. We have some preliminary evidence no crosstalk effects device....
This paper addresses a comprehensive analytical analysis of new accurate electrical model silicon photomultiplier (SiPM) detectors. The adopted circuit allows to truly reproduce the SiPM output signal waveform apart from specific technology employed for fabrication process, and can also be profitably exploited perform reliable circuit-level simulations. A novel expression transient single-photoelectron response due photon absorption is systematically developed. attained function accurately...
A large photocurrent increase in 4H-SiC interdigit Schottky UV detectors was observed the presence of a thermally grown silicon oxide layer. In particular, internal quantum efficiency higher than unity indicated an gain strictly correlated with superficial on SiC. Moreover, long recovery time, range 10–19s, evaluated by fall-time measurements due to detrapping charges after irradiation switching off. The photoresponse device analytically described considering lowering surface potential...