0000000000225353

AUTHOR

M.a. Leigui De Oliveira

showing 3 related works from this author

A search for point sources of EeV neutrons

2012

A thorough search of the sky exposed at the Pierre Auger Cosmic Ray Observatory reveals no statistically significant excess of events in any small solid angle that would be indicative of a flux of neutral particles from a discrete source. The search covers from −90◦ to +15◦ in declination using four different energy ranges above 1 EeV (1018 eV). The method used in this search is more sensitive to neutrons than to photons. The upper limit on a neutron flux is derived for a dense grid of directions for each of the four energy ranges. These results constrain scenarios for the production of ultrahigh energy cosmic rays in the Galaxy.

AstronomyEnergy fluxAstrophysics01 natural sciences7. Clean energyNeutron fluxObservatorycosmic rays – Galaxy: disk – methods: data analysisNeutron detection010303 astronomy & astrophysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Physics[SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Gamma rayAstrophysics::Instrumentation and Methods for AstrophysicsASTRONOMYPierre Auger ObservatoryCOSMIC-RAYSRadiación cósmicaUltra High Energy Cosmic RayComputingMethodologies_DOCUMENTANDTEXTPROCESSINGMASSIVE BLACK-HOLEFísica nuclearPierre Auger Observatory high-energy neutron sources neutron flux limitAstrophysics - High Energy Astrophysical Phenomena[PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Astrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesCosmic rayGalaxiaGalaxy: diskcosmic rays0103 physical scienceshigh-energy neutron sourcesNeutronCosmic-ray observatoryCiencias ExactasANISOTROPY010308 nuclear & particles physicsGAMMA-RAYSAnálisis de datosAstronomyFísicaAstronomy and AstrophysicsASTROFÍSICAneutron flux limitmethods: data analysisNÊUTRONSSpace and Planetary ScienceUltra High Energy Cosmic RaysExperimental High Energy Physics[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]GALACTIC-CENTER
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Design, upgrade and characterization of the silicon photomultiplier front-end for the AMIGA detector at the Pierre Auger Observatory

2021

The successful installation, commissioning, and operation of the Pierre Auger Observatory would not have been possible without the strong commitment and effort from the technical and administrative staff in Malargue. We are very grateful to the following agencies and organizations for financial support: Argentina -Comision Nacional de Energia Atomica; Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT); Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); Gobierno de la Provincia de Mendoza; Municipalidad de Malargue; NDM Holdings and Valle Las Lenas; in gratitude for their continuing cooperation over land access; Australia -the Australian Research Council; Braz…

Physics - Instrumentation and DetectorsPhysics::Instrumentation and DetectorsAstronomyPerformance of High Energy Physics Detector01 natural sciences7. Clean energyEtc)030218 nuclear medicine & medical imaging0302 clinical medicineFront-end electronics for detector readoutAPDsInstrumentationphysics.ins-detPhoton detectors for UVMathematical PhysicsInstrumentation et méthodes en physiqueEBCCDsVisible and IR photons (solid-state) (PIN diodes APDs Si-PMTs G-APDs CCDs EBCCDs EMCCDs CMOS imagers etc)electronicsSettore FIS/01 - Fisica SperimentaleCalibration and fitting methods; Performance of High Energy Physics Detectors; Photon detectors for UVPhoton detectors for UV visible and IR photons (solid-state) (PIN diodes APDs Si-PMTs G-APDs CCDs EBCCDs EMCCDs CMOS imagers etc)Astrophysics::Instrumentation and Methods for AstrophysicsSi-PMTsInstrumentation and Detectors (physics.ins-det)charged particleAPDs; Calibration and fitting methods; Performance of High Energy Physics Detectors; Photon detectors for UV; CCDs; Cluster finding; CMOS imagers; EBCCDs; EMCCDs; Etc); Front-end electronics for detector readout; Pattern recognition; G-APDs; Si-PMTs; Visible and IR photons (solid-state) (PIN diodesAugerobservatorydensity [muon]Pattern recognition cluster finding calibration and fitting methodG-APDsChristian ministryupgradeddc:620Astrophysics - Instrumentation and Methods for Astrophysicsperformanceatmosphere [showers]Land accessCherenkov counter: waterairAstrophysics::High Energy Astrophysical PhenomenaUHE [cosmic radiation]FOS: Physical sciencesVisible and IR photons (solid-state) (PIN diodes03 medical and health sciencesPolitical sciencePattern recognition0103 physical sciencesmuon: densityFront-end electronics for detector readout; Pattern recognitionphotomultiplier: siliconHigh Energy Physicscosmic radiation: UHE[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]ddc:610CMOS imagersInstrumentation and Methods for Astrophysics (astro-ph.IM)Engineering & allied operationsscintillation counterCalibration and fitting methodsshowers: atmosphere010308 nuclear & particles physicswater [Cherenkov counter]Cluster findingAutres mathématiquesCCDsEMCCDsResearch councilefficiencyExperimental High Energy Physicssilicon [photomultiplier]Performance of High Energy Physics DetectorsHigh Energy Physics::ExperimentHumanitiesRAIOS CÓSMICOSastro-ph.IM
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Studies on the response of a water-Cherenkov detector of the Pierre Auger Observatory to atmospheric muons using an RPC hodoscope

2020

Extensive air showers, originating from ultra-high energy cosmic rays, have been successfully measured through the use of arrays of water-Cherenkov detectors (WCDs). Sophisticated analyses exploiting WCD data have made it possible to demonstrate that shower simulations, based on different hadronic-interaction models, cannot reproduce the observed number of muons at the ground. The accurate knowledge of the WCD response to muons is paramount in establishing the exact level of this discrepancy. In this work, we report on a study of the response of a WCD of the Pierre Auger Observatory to atmospheric muons performed with a hodoscope made of resistive plate chambers (RPCs), enabling us to selec…

Physics - Instrumentation and DetectorsPhysics::Instrumentation and DetectorsAstronomy01 natural sciences030218 nuclear medicine & medical imaginglaw.invention0302 clinical medicinelawObservatoryatmosphere [muon]Instrumentationphysics.ins-detMathematical PhysicsLarge detector-systems performancePhysicsInstrumentation et méthodes en physiquePerformance of high energy physics detectorsData reduction methods; Large detector systems for particle and astroparticle physics; Large detector-systems performance; Performance of high energy physics detectorsDetectorSettore FIS/01 - Fisica SperimentaleAstrophysics::Instrumentation and Methods for Astrophysicsresistive plate chamberInstrumentation and Detectors (physics.ins-det)trajectory [muon]Augerobservatorymuon: atmosphereAstrophysics - Instrumentation and Methods for AstrophysicsData reduction methodsatmosphere [showers]Cherenkov detectorairCherenkov counter: waterAstrophysics::High Energy Astrophysical PhenomenaUHE [cosmic radiation]FOS: Physical sciencesCosmic raymuon: trajectoryNuclear physics03 medical and health sciencesHodoscopeData reduction method0103 physical sciencesCalibrationHigh Energy Physicsddc:610cosmic radiation: UHE[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]Instrumentation and Methods for Astrophysics (astro-ph.IM)ZenithCiencias ExactasPierre Auger Observatoryshowers: atmosphere010308 nuclear & particles physicsLarge detector systems for particle and astroparticle physicswater [Cherenkov counter]hodoscopeFísicaAutres mathématiquesstabilitycalibrationData reduction methods Large detector systems for particle and astroparticle physics Large detector-systems performance Performance of High Energy Physics DetectorsExperimental High Energy PhysicsLarge detector systems for particle and astroparticle physicHigh Energy Physics::ExperimentRAIOS CÓSMICOSastro-ph.IM
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