1,721,210 research outputs found
Measurement of the CR primary spectrum with ARGO-YBJ
Full text linkThe study of cosmic rays below 1015 eV is one of the main goals of the ARGO-YBJ experiment. In this paper we will report on the measurement of the primary light component spectrum
Measurement of the cosmic rays primary spectrum with ARGO-YBJ experiment
No full textThe study of cosmic rays physic of 1012 -1015 primary cosmic energy is one of the main goals of ARGO-YBJ experiment. The detector, located at the Yangbajing Cosmic Ray Laboratory (Tibet, 4300 m a.s.l., 606 g/cm2), is an EAS array consisting of a continuous carpet of RPCs. The low energy threshold of the detector allows to study an energy region characterized by the transition from the direct to the indirect measurements. In this paper we will report on the measurement of the cosmic rays energy spectrum at different zenith angles. The phenomenology of horizontal air shower (> 70°) will be described and discussed. Copyright © 2012 by INFN
Measurement of the cosmic rays light component (pHe) primary spectrum with ARGO-YBJ
No full textThe ARGO-YBJ experiment, located at the Yangbajing Cosmic Ray Laboratory (Tibet, 4300 m a.s.l., 606 g/cm 2) has an high segmentation that allows the detection of air showers with greater detail and lower energy threshold (a few hundred GeV) compared to other EAS arrays. The spectrum of the primary cosmic ray light (pHe) component in the energy range ∼10-100TeV is measured selecting quasi-vertical showers (θ<15°) with the reconstructed core position located in a 40×40 m 2 fiducial area. The results are compared with other measurements carried out with direct methods. © 2012 Elsevier B.V
Observation of horizontal air showers with ARGO-YBJ
No full textA preliminary analysis of Extensive Air Showers reconstructed by ARGO-YBJ with zenith angle greater than 80° is reported. The measurement of the size spectrum and of the azimuthal distribution is discussed. A description of the topology of these events is also provided. © 2011 Elsevier B.V
Measurement of the CR light component primary spectrum with ARGO-YBJ experiment
No full textThe ARGO-YBJ experiment, located at the Yangbajing Cosmic Ray Laboratory (Tibet, 4300 m a.s.l., 606 g/cm2) has an high segmentation that allows the detection of air showers with greater detail and lower energy threshold (a few hundred GeV) compared to other EAS arrays. The spectrum of the primary Cosmic Ray light (p+He) component in the energy range ∼10 - 100 TeV is measured selecting quasi-vertical showers with the reconstructed core position located in a 40×40 m2 fiducial area. The results are compared with other measurements carried out with direct methods
Observation of horizontal air showers with ARGO-YBJ
No full textThe understanding of Cosmic Rays (CRs) origin at any energy is made difficult by the poor knowledge of the elemental composition of the radiation. Inclined showers (θ > 60◦) induced by very high-energy CRs are mainly produced by secondary muons, in contrast to the vertical ones dominated by photons and electrons stemming from π0 decays. Measurements of the CRs rate at different zenith angles give information on the relative number of muons in a shower, which is dependent on the CR elemental composition, thus providing an important tool to probe the CR mass distribution but also the hadronic interaction models. In this paper a study of the non-attenuated shower component at a zenith angle θ > 60◦, through the observation of the so-called horizontal air showers by the ARGO-YBJ experiment, is presented. More than 107 well-contained horizontal events have been analyzed to study the production and interaction of high energy CR muons and neutrinos
Measurement of the cosmic ray primary spectrum with ARGO-YBJ experiment
No full textThe study of cosmic ray physic of 1012-1015 primary cosmic energy is one of the main goals of ARGO-YBJ experiment. The detector, located at the Yangbajing Cosmic Ray Laboratory (Tibet, 4300 m a.s.l., 606 g/cm2), is an EAS array consisting of a continuous carpet of RPCs. The low energy threshold of the detector allows to study an energy region characterized by the transition from the direct to the indirect measurements. In this talk we will report on the measurement of the cosmic ray energy spectrum at different zenith angles. The phenomenology of horizontal air shower (θ > 70°) will be described and discussed
The high-energy particle detector on board of the China seismo-electromagnetic satellite
No full textThe study of the Van Allen belts temporal stability is among the main objectives of the China Seismo-Electromagnetic Satellite (CSES) space mission, as well as the study of other electromagnetic disturbances with possible seismic origin. In parallel to this, the CSES mission will address issues of heliospheric and magnetospheric physics, by measuring the cosmic radiation around the Earth. The CSES satellite, developed by a Chinese-Italian collaboration, will be launched in the first half of 2017 and inserted into a circular Sun-synchronous orbit with 98° inclination and 500 km altitude. The expected lifetime is 5 years. CSES hosts several instruments on board: 2 magnetometers, an electric field detector, a plasma analyser, a Langmuir probe and a High-Energy Particle Detector (HEPD). The HEPD detector, responsibility of the Italian side of the CSES collaboration, will measure electrons (3 - 100 MeV) and protons (30 - 300 MeV) along CSES orbit. It consists of a segmented layer of plastic scintillators for the trigger and a calorimeter constituted by a tower of plastic scintillator counters and a LYSO plane. The direction of the incident particle is provided by two planes of double-side silicon micro-strip detectors placed in front of the trigger. Topic of this talk is the technical description of the HEPD and its main characteristics
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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