Search results for "Resistive plate chambers"

showing 5 items of 5 documents

Long-term monitoring of the TeV emission from Mrk 421 with the ARGO-YBJ experiment

2011

ARGO-YBJ is an air shower detector array with a fully covered layer of resistive plate chambers. It is operated with a high duty cycle and a large field of view. It continuously monitors the northern sky at energies above 0.3 TeV. In this paper, we report a long-term monitoring of Mrk 421 over the period from 2007 November to 2010 February. This source was observed by the satellite-borne experiments Rossi X-ray Timing Explorer and Swift in the X-ray band. Mrk 421 was especially active in the first half of 2008. Many flares are observed in both X-ray and gamma-ray bands simultaneously. The gamma-ray flux observed by ARGO-YBJ has a clear correlation with the X-ray flux. No lag between the X-r…

media_common.quotation_subjectAstrophysics::High Energy Astrophysical PhenomenaOggetti di tipo BL LacertaeFOS: Physical sciencesFluxAstrophysics01 natural sciences7. Clean energyindividual (Markarian 421) [BL Lacertae objects]Spectral lineGamma-rays Markarian 421 BL Lacertae Resistive Plate Chamberslaw.inventionlaw0103 physical sciencesRadiative transfer010303 astronomy & astrophysicsmedia_commonHigh Energy Astrophysical Phenomena (astro-ph.HE)Physics010308 nuclear & particles physicsMarkarian 421Settore FIS/01 - Fisica SperimentaleAstronomy and Astrophysicsgeneral [gamma ray]Synchrotron3. Good healthAir shower13. Climate actionSpace and Planetary ScienceDuty cycleSkyRaggi gammaSpectral energy distributionAstrophysics - High Energy Astrophysical Phenomena
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Calibration of the RPC charge readout in the ARGO-YBJ experiment

2012

""The charge readout of Resistive Plate Chambers (RPCs) is implemented in the ARGO-YBJ experiment to measure the charged particle density of the shower front up to 10^4\\\/m^2, enabling the study of the primary cosmic rays with energies in the ''knee'' region. As the first time for RPCs being used this way, a telescope with RPCs and scintillation detectors is setup to calibrate the number of charged particles hitting a RPC versus its charge readout. Air shower particles are taken as the calibration beam. The telescope was tested at sea level and then moved to the ARGO-YBJ site for coincident operation with the ARGO-YBJ experiment. The charge readout shows good linearity with the particle de…

Optical telescopesNuclear and High Energy PhysicsPhysics::Instrumentation and DetectorsCamere a Piastre Resistive (RPC)Resistive plate chamberAstrophysics::High Energy Astrophysical PhenomenaCosmic raylaw.inventionTelescopeSettore FIS/05 - Astronomia E AstrofisicaOpticslawCoincidentAir showersCalibrationSea levelInstrumentationParticle densitiesCosmic raysResistive Plate Chambers Charge read-out Extended Air ShowersPhysicsAir showers Charge readout Dynamic range Knee regions Particle densities Resistive plate chambers; Calibration Charged particles Cosmic rays Experiments Optical telescopes Sea level Telescopes; Particle spectrometersResistive touchscreenScintillationDynamic rangeCharge readoutParticle spectrometersbusiness.industryCharged particlesSettore FIS/01 - Fisica SperimentaleAstrophysics::Instrumentation and Methods for AstrophysicsCharged particleAir showerCalibrazione della Risposta Analogica di RPCKnee regionsLettura Analogica di RPCCalibrationResistive plate chambersbusinessExperimentsTelescopes
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Measurement of branching fractions and charge asymmetries for exclusive B decays to charmonium

2005

We report measurements of branching fractions and charge asymmetries of exclusive decays of neutral and charged B mesons into two-body final states containing a charmonium state and a light strange meson. The charmonium mesons considered are J/Psi, Psi(2S) and Chi_c1, and the light meson is either K or K*. We use a sample of about 124 million BBbar events collected with the BABAR detector at the PEP-II storage ring at the Stanford Linear Accelerator Center.

Molecular dynamicElectron–positron annihilationHigh Energy Physics::LatticeBABARNuclear TheoryGeneral Physics and Astronomy01 natural sciences13.25.Hw 11.30.Er 12.15.HhElectron positronlaw.inventionHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)Mathematical modellawB mesons; charm particles; chi mesons; kaon production; meson hadronic decay; psi mesons[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]PEP2B mesonNuclear ExperimentConstraint theorymedia_commonPhysicsAnnihilationEnergy dissipationSettore FIS/01 - Fisica SperimentaleQuarkonium strange mesonParticle physicsMESONSpair production [B]PARTICLE PHYSICSBranching fractionSLACOptimizationParticle physicsSiliconMesonmedia_common.quotation_subjectFOS: Physical sciencesCharged particleAnnihilationAsymmetryPARTICLE PHYSICS; PEP2; BABARNuclear physics0103 physical sciencesbranching ratio [B0]Colliding beamsMESONS; BABAR; SLACBeam directionResistive plate chambers (RPC)010306 general physicshadronic decay [B]Calorimeter010308 nuclear & particles physicsBranching fractionHigh Energy Physics::PhenomenologyParticle acceleratorHEPbranching ratio [B+]Quantum theoryElectromagnetic calorimeters (EMC)High Energy Physics::ExperimentFísica de partículesExperimentsStorage ring
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Highlights from the ARGO-YBJ Experiment

2012

""The ARGO-YBJ experiment at YangBaJing in Tibet (4300m a.s.l.) has been taking data with its full layout since October 2007. Here we present a few significant results obtained in gamma-ray astronomy and cosmic-ray physics. Emphasis is placed on the analysis of gamma-ray emission from point-like sources (Crab Nebula, MRK 421), on the preliminary limit on the antiproton\\\/proton flux ratio, on the large-scale cosmic-ray anisotropy and on the proton-air cross-section. The performance of the detector is also discussed, and the perspectives of the experiment are outlined.""

HistoryAstronomyFluxAstrophysicsProton flux01 natural sciencesArgo-YbjGamma-ray emissionSettore FIS/05 - Astronomia E AstrofisicaCosmic-ray physicsResistive Plate ChambersInstrumentation010303 astronomy & astrophysicsArgoPhysicsRange (particle radiation)DetectorSettore FIS/01 - Fisica SperimentaleCrab nebulaAstrophysics::Instrumentation and Methods for AstrophysicsGamma rayCrab nebula Extensive air showers Flux ratio Gamma-ray astronomy Gamma-ray emission Ground based Resistive plate chambers; Astronomy Cosmic rays Cosmology Experiments; Gamma raysFlux ratioCosmologyComputer Science ApplicationsResistive plate chambersNuclear and High Energy PhysicsX- and γ-ray instrumentGround-based gamma-ray astronomyAstrophysics::High Energy Astrophysical PhenomenaExtensive air showerCosmic rayAstrophysics::Cosmology and Extragalactic AstrophysicsCosmic RayEducationResistive Plate Chambers Extensive air showers Ground-based g ray astronomy Cosmic-ray physicsGround-based γ-ray astronomy0103 physical sciencesExtensive air showersCosmic raysExtensive air showers X- and γ-ray instruments Pulsars. Quasars active or peculiar galaxies objects and systemsAstrophysics::Galaxy AstrophysicsGamma-ray astronomy010308 nuclear & particles physicsGamma raysAstronomyResistive Plate ChamberGround basedCrab NebulaAntiprotonResistive Plate Chambers; Extensive air showers; Ground-based γ-ray astronomy; Cosmic-ray physicsSatelliteGamma-ray burstExperimentsJournal of Physics: Conference Series
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Layout and performance of RPC used in the Argo-YBJ experiment

2006

The layout of the RPCs, used in the Argo-YBJ experiment to image with a high space-time granularity the atmospheric shower, is described in this paper. The detector has been assembled to provide both digital and analog informations in order to cover a wide particle density range with a time accuracy of 1 ns. The experimental results obtained operating the chambers in streamer mode at sea level with a standard gas mixture are presented. (c) 2006 Elsevier B.V. All rights reserved.

PhysicsNuclear and High Energy PhysicsRivelatori a gaPhysics::Instrumentation and DetectorsCosmic rays detectorAstrophysics::High Energy Astrophysical PhenomenaDetectorSettore FIS/01 - Fisica SperimentaleResistive Plate Chambers Cosmic Rays Extended Air ShowersCamere a piani resistiviRivelatori di raggi cosmiciSettore AGR/03 - Arboricoltura Generale E Coltivazioni ArboreeGas detectorRange (statistics)RPCGranularityParticle densityInstrumentationArgoRemote sensing
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