Search results for "PHOTOMULTIPLIER"

showing 10 items of 194 documents

Measurements of Silicon Photomultipliers Responsivity in Continuous Wave Regime

2013

We report on the electrical and optical characterization, in continuous wave regime, of a novel class of silicon photomultipliers fabricated in standard planar technology on a silicon p-type substrate. Responsivity measurements, performed with an incident optical power down to tenths of picowatts, at different reverse bias voltages and on a broad (340–820 nm) spectrum, will be shown and discussed. The device temperature was monitored, allowing us to give a physical interpretation of the measurements. The obtained results demonstrate that such novel silicon photomultipliers are suitable as sensitive power meters for low photon fluxes.

Silicon photonicsMaterials scienceSiliconPhysics::Instrumentation and Detectorsbusiness.industryHybrid silicon laserchemistry.chemical_elementSettore ING-INF/02 - Campi ElettromagneticiOptical powerSubstrate (electronics)Settore ING-INF/01 - ElettronicaElectronic Optical and Magnetic MaterialsResponsivityOpticsSilicon photomultiplierchemistryOptoelectronicsContinuous waveAvalanche photodiode (APD) photodetector responsivity silicon photomultiplier (SiPM) single-photon avalanche diode (SPAD)Electrical and Electronic EngineeringbusinessIEEE Transactions on Electron Devices
researchProduct

Readiness of the ATLAS Tile Calorimeter for LHC collisions

2010

67 páginas.-- El PDF es la versión pre-print (arXiv:1007.5423v2).-- The ATLAS Collaboration.-- et al.

SystemPhysics - Instrumentation and DetectorsPhysics and Astronomy (miscellaneous)Physics::Instrumentation and DetectorsPerformance7. Clean energy01 natural sciences030218 nuclear medicine & medical imagingSettore FIS/04 - Fisica Nucleare e SubnucleareHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)0302 clinical medicine[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Detectors and Experimental TechniquesDetectors de radiaciócosmic rayPhysicsLarge Hadron ColliderDetectorSettore FIS/01 - Fisica SperimentaleAstrophysics::Instrumentation and Methods for AstrophysicsInstrumentation and Detectors (physics.ins-det)ATLASmedicine.anatomical_structureScintillatorsPhysical Sciencesmagnetic-fields; scintillators; electronics; performance; systemLHCCol·lisionadors d'hadronsPhotomultiplierFOS: Physical sciencesCosmic rayddc:500.2Noise (electronics)530LHC collisions; AtlasNuclear physics03 medical and health sciencesAtlas (anatomy)0103 physical sciencesCalibrationmedicinetile hadronic calorimeterFysikddc:530High Energy Physics[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]010306 general physicsEngineering (miscellaneous)Ciencias ExactasCalorimeter (particle physics)010308 nuclear & particles physicsFísicaMagnetic-FieldsHigh Energy Physics::ExperimentElectronics
researchProduct

Design and development of a fNIRS system prototype based on SiPM detectors

2014

Functional Near Infrared Spectroscopy (fNIRS) uses near infrared sources and detectors to measure changes in absorption due to neurovascular dynamics in response to brain activation. The use of Silicon Photomultipliers (SiPMs) in a fNIRS system has been estimated potentially able to increase the spatial resolution. Dedicated SiPM sensors have been designed and fabricated by using an optimized process. Electrical and optical characterizations are presented. The design and implementation of a portable fNIRS embedded system, hosting up to 64 IR-LED sources and 128 SiPM sensors, has been carried out. The system has been based on a scalable architecture whose elementary leaf is a flexible board …

business.industryComputer scienceDetectorNear-infrared spectroscopySettore ING-INF/02 - Campi ElettromagneticiNear Infrared SpectroscopySilicon PhotomultipliersReflectivitySettore ING-INF/01 - ElettronicaImaging phantomlaw.inventionOpticsSilicon photomultiplierlawOptoelectronicsSensitivity (control systems)businessEmbedded SystemsImage resolutionSilicon PhotomultiplierLight-emitting diode
researchProduct

Fiberless, Multi-Channel fNIRS-EEG System Based on Silicon Photomultipliers: Towards Sensitive and Ecological Mapping of Brain Activity and Neurovasc…

2020

Portable neuroimaging technologies can be employed for long-term monitoring of neurophysiological and neuropathological states. Functional Near-Infrared Spectroscopy (fNIRS) and Electroencephalography (EEG) are highly suited for such a purpose. Their multimodal integration allows the evaluation of hemodynamic and electrical brain activity together with neurovascular coupling. An innovative fNIRS-EEG system is here presented. The system integrated a novel continuous-wave fNIRS component and a modified commercial EEG device. fNIRS probing relied on fiberless technology based on light emitting diodes and silicon photomultipliers (SiPMs). SiPMs are sensitive semiconductor detectors, whose large…

clinical brain monitoringBrain activity and meditationComputer scienceneurovascular couplingElectroencephalographylcsh:Chemical technologySettore ING-INF/01 - Elettronica01 natural sciencesBiochemistryArticleAnalytical Chemistry010309 optics03 medical and health sciences0302 clinical medicineSilicon photomultiplierNeuroimagingInterference (communication)Component (UML)0103 physical sciencesmedicineHumanslcsh:TP1-1185electroencephalography (EEG)Electrical and Electronic EngineeringSpectroscopyInstrumentationBrain MappingSpectroscopy Near-Infraredmedicine.diagnostic_testEcologyHemodynamicsmultimodal neuroimagingBrainMultimodal neuroimagingElectroencephalographyNeurophysiologyAtomic and Molecular Physics and Opticsmedicine.anatomical_structureFPGA Brain Oxygenation Map clinical brain monitoringScalpSettore ING-INF/06 - Bioingegneria Elettronica E Informaticasilicon photomultipliers.Neurovascular couplingsilicon photomultipliers030217 neurology & neurosurgeryfunctional near infrared spectroscopy (fNIRS)Sensors
researchProduct

Design and development of a continuous wave functional near infrared spectroscopy system

2014

Functional Near InfraRed Spectroscopy uses light sources and optical detectors for human brain monitoring. In this paper, a portable, low cost, battery-operated, multi-channel, continuous wave fNIRS embedded system, hosting up to 64 LED sources and 128 Silicon PhotoMultiplier optical detectors, is reported on. The designed system is based on a scalable architecture, in which each probe consists of 8 modular and flexible stands, able to host 4 bi-color LEDs as light sources, 16 silicon photomultipliers as photodetectors and a temperature sensor. The hardware structure allows to easily set up several relevant parameters: the timing of the LEDs, the optical power emitted by the LEDs; the acqui…

embedded systemFunctional Near Infrared SpectroscopySettore ING-INF/02 - Campi ElettromagneticiphotodetectorSettore ING-INF/01 - ElettronicaSilicon PhotoMultiplier
researchProduct

Design of a Multichannel Continuous Wave fNIRS System implemented with SiPM

2013

embedded systemFunctional Near Infrared SpectroscopySettore ING-INF/02 - Campi ElettromagneticiphotodetectorSettore ING-INF/01 - ElettronicaSilicon PhotoMultiplier
researchProduct

Development of a CW-fNIRS System for brain monitoring

2014

embedded systemFunctional Near Infrared SpectroscopySettore ING-INF/02 - Campi ElettromagneticiphotodetectorSettore ING-INF/01 - ElettronicaSilicon PhotoMultiplier
researchProduct

Blood Pressure Monitoring with a PPG Embedded System

2014

embedded systemPhotoPlethysmoGraphysensorSettore ING-INF/02 - Campi ElettromagneticiSettore ING-INF/01 - ElettronicaSilicon PhotoMultiplier
researchProduct

Progettazione e realizzazione di un sistema Continuous Wave fNIRS basato su tecnologia SiPM

2014

embedded systemSilicon PhotoMultiplier detectorFunctional Near Infrared SpectroscopySettore ING-INF/02 - Campi ElettromagneticiphotodetectorSettore ING-INF/01 - Elettronica
researchProduct

Progettazione e realizzazione di un sistema Continuous Wave fNIRS basato su tecnologia SiPM

Optical techniques represent a suitable tool for in vivo and non-invasive diagnosis of human brain and tissues. Functional Near InfraRed Spectroscopy (fNIRS) is revealing as an emerging neuroimaging technology, since it is safe, relatively inexpensive and little cumbersome. fNIRS relies on the measurement of the oxygen concentration in the blood by means of light beams impinging on the tissues under test. Haemoglobin concentration variations (oxygenated/deoxygenated) can provide very important information on brain activity and allow to discriminate the main brain area involved during tests. Herein, we present the design and development of an innovative solution for a portable continuous wav…

embedded systemdetectorSiPMFunctional Near Infrared SpectroscopyfNIRSphotodetectorSettore ING-INF/01 - ElettronicaSilicon PhotoMultiplier
researchProduct