0000000000957557

AUTHOR

A Collura

showing 6 related works from this author

PROGETTAZIONE DI UNA OPERA DI PRESA A BASSO IMPATTO AMBIENTALE PER UN IMPIANTO MINI IDROELETTRICO IN SICILIA

2013

Opera di presa Mini impianto ad acqua fluente Turbina cross flow Sicilia
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Efficiency of concentration photovoltaic cells governed by luminescence processes

2013

The development of multi-junctions III-V semiconductors solar cells, that combine high conversion efficiency (over 40%) and capability of working under high illumination intensity (up to 1000 suns), has stimulated a rapid growth of concentrating photovoltaic (CPV) technology. The performance of these cells is based on the matching between the semiconductors band gap and the solar spectrum so as to optimize the current balancing between the subcells. This requirement is also important in connection with the CPV modules using lenses, mirrors, optical coupling compounds that introduce a wavelength dependent response to the sunlight. Therefore, care must be exercised in designing optimum cells …

multi-junctions solar cellUV-Visible Down conversionIII-V semiconductorConcentarting photovoltaic
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Optimization of the Optical Components in a Reflective High CPV Module

2014

HCPV module self-cleaning coating frustum encapsulant
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The LOFT mission concept: a status update

2016

The Large Observatory For x-ray Timing (LOFT) is a mission concept which was proposed to ESA as M3 and M4 candidate in the framework of the Cosmic Vision 2015-2025 program. Thanks to the unprecedented combination of effective area and spectral resolution of its main instrument and the uniquely large field of view of its wide field monitor, LOFT will be able to study the behaviour of matter in extreme conditions such as the strong gravitational field in the innermost regions close to black holes and neutron stars and the supra-nuclear densities in the interiors of neutron stars. The science payload is based on a Large Area Detector (LAD, >8m2 effective area, 2-30 keV, 240 eV spectral resolut…

X-ray timing[ SDU.ASTR.GA ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA]Field of viewAstrophysics01 natural scienceslaw.inventionlawObservatorytiming010303 astronomy & astrophysicsQBPhysicsmicrochannel plates. PROPORTIONAL COUNTER ARRAYCALIBRATIONX-ray astronomyElectronic Optical and Magnetic MaterialApplied MathematicsAstrophysics::Instrumentation and Methods for AstrophysicsComputer Science Applications1707 Computer Vision and Pattern RecognitionX-ray detectorsCondensed Matter Physicscompact objectsX-ray spectroscopy[SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA]spectroscopyCosmic Vision[ INFO ] Computer Science [cs]Silicon detectorAstrophysics::High Energy Astrophysical PhenomenaCondensed Matter PhysicTelescopeX-rayX-ray astronomySilicon detectors; spectroscopy; timing; X-ray astronomy; Electronic Optical and Magnetic Materials; Condensed Matter Physics; Applied Mathematics; Electrical and Electronic EngineeringSettore FIS/05 - Astronomia e Astrofisica0103 physical sciencesElectronic[INFO]Computer Science [cs]Optical and Magnetic MaterialsSpectral resolutionElectrical and Electronic EngineeringDETECTORta115X-ray astronomy Silicon detectors timing spectroscopy010308 nuclear & particles physicsX-ray imagingX-ray timing; X-ray spectroscopy; X-ray imaging; compact objects; X-ray detectors; microchannel plates. PROPORTIONAL COUNTER ARRAY; CALIBRATION; DETECTORApplied MathematicNeutron starQB460-466 AstrophysicsSilicon detectors; spectroscopy; timing; X-ray astronomy; Electronic Optical and Magnetic Materials; Condensed Matter Physics; Computer Science Applications1707 Computer Vision and Pattern Recognition; Applied Mathematics; Electrical and Electronic EngineeringSilicon detectors; spectroscopy; timing; X-ray astronomySilicon detectorsLarge Observatory For x-ray Timing (LOFT) Large Area Detector (LAD) Wide Field Monitor (WFM) Large Area Silicon Drift Detectors (SDD)Gamma-ray burst
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UV-Visible down conversion based on nanosized silica promising for CPV applications

2014

solar cells silica nanoparticles luminescence
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A multichannel piezo driver for active mirrors in X-ray telescopes

2016

X-ray astronomy is gaining importance for studying X-ray space sources such as single and binary stars, neutron stars, supernovae and black holes. Due to atmospheric absorption, X-ray telescopes must operate in space on satellites. Among the causes limiting the resolution of modern telescopes are distortions in mirrors shape. An innovative approach for X-ray mirrors aims at correcting the shape errors by means of piezo-ceramic actuators glued to the back of the mirrors, thus creating an “active mirror”. In order to test the viability of shape correction, we fabricated [1] a prototype of a thin glass active mirror, sized 20 cm x 20 cm with a 400 um thickness (Fig. 1). The mirror can allocate…

Settore FIS/05 - Astronomia E AstrofisicaX-ray mirrors active optics thin glass mirrors piezoelectric actuatorsSettore ING-INF/01 - Elettronica
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