1,721,100 research outputs found
Cosmic ray light component (p+He) energy spectrum measured by the ARGO-YBJ experiment in the 3-3000 TeV energy range
Full text linkThe energy spectrum and composition of Cosmic Rays (CR) play an important role in the understanding of the acceleration and propagation mechanisms of high-energy particles. The ARGO-YBJ experiment (Yanbajing, Tibet, P. R. China, 4300 m a.s.l.) is a ground-based air shower detector designed in order to detect showers produced by primaries in the 1-104 TeV energy range. The high spacetime resolution of the detector allows a precise measurement of the lateral particle distribution. This information can be exploited in order to discriminate showers produced by primaries of different mass. In this work the measurement of the Proton plus Helium energy spectrum is presented in the 1-3000 TeV energy range. A deviation from a single power law is clearly evident at energies less than1PeV
A possible design of the readout electronics for large area SiPM detectors of the TAO experiment
No full textCosmic Ray measurements in the region 1-100 TeV: combined proton and helium spectrum
No full textThe ARGO-YBJ experiment, located in the Yangbajing Cosmic Ray observatory (4300 m a.s.l. Tibet, P.R. China),
detects Extensive Air Showers in a wide energy range by means of a full-coverage detector based on RPC chambers.
In this work recent results about the measurement of the combined proton and helium spectrum in the energy range
5-250 TeV are presented. The ARGO-YBJ results are therefore the first indirect measurements at these energies with
ground-based detectors. The measured spectrum can be compared to direct measurements in the same energy region.
The data show a good agreement with recent direct measurements and suggest that the spectrum is harder than in the
low energy reg
The all-particle spectrum measured by means of a Bayesian unfolding technique in the energy range 1-100 TeV with the ARGO-YBJ data
No full textAbstract. The ARGO-YBJ experiment detects the
charged component of Extensive Air Showers by
means of a full-coverage detector installed at a high
altitude location (4300 m a.s.l. in Tibet, P.R. China).
The detector consists of a central carpet of about
5800 m2 with an active area of 93% surrounded
by a guard ring with a lower sampling density.
In this work some runs taken in the 2008 year
were analyzed, the measurement of the all-particle
spectrum in the energy region 1-100 TeV is discussed.
Data were analyzed by using a Bayesian unfolding
procedure
Energy spectrum of cosmic ray protons and helium nuclei measured by the ARGO-YBJ experiment
No full textThe ARGO-YBJ experiment is a full-coverage air shower detector operating at the Yangbajing International Cosmic Ray Observatory (Tibet, PR China, 4300 m a.s.l.). The detector was in stable data taking in its full configuration from November 2007 to February 2013. More than 5×10115×1011 events have been collected and reconstructed. Due to its characteristics (full-coverage, high segmentation, high altitude operation) the ARGO-YBJ experiment is able to investigate the cosmic ray energy spectrum in a wide energy range and offer the possibility of measuring the cosmic ray light component spectrum down to the TeV region, where direct balloon-borne measurements are available. In this work we present the measurement of the proton and helium spectra in the energy range 1–300 TeV by using a large data sample collected between January 2008 and December 2011
The light component spectrum measured by the ARGO-YBJ experiment in the energy region 1–300 TeV.
No full textThe ARGO-YBJ experiment is taking data at the Yangbajing International Cosmic Rays Observatory located
at an altitude of about 4300 m a.s.l. (Tibet, P.R. China). The detector consists of an EAS array made of a full coverage
RPCs carpet. In this paper the light component cosmic ray spectrum in the energy region 1–300 TeV is presented, these
results allow the comparison between satellite and balloon–borne data with ground based measurements. The measured
intensities obtained in this work are in good agreement with the recent CREAM measurements and show a spectrum
flatter than the low energy measurement
The observation of the light component spectrum in the 5–250 TeV region by the ARGO-YBJ experiment
No full textThe ARGO-YBJ experiment detects extensive air showers by means of a full coverage detector located at the YBJ International Cosmic Ray Observatory in Yangbajing (4300 m a.s.1, Tibet, P.R. China). In this work the light component spectrum in the energy region between 5 - 250 TeV is presented. The results are compared with data provided by the CREAM experiment in the same energy region. The ARGO-YBJ data are fully consistent with the CREAM data. This analysis is based on a Bayesian procedure
Cosmic ray elemental composition study by using an artificial neural network based on the measurement of the lateral particle density distribution in showers induced by primaries in the 30-10000 TeV energy region
No full textThe mass composition plays an important role for understanding the origin of the UHE cosmic rays. The
composition in the energy region at and beyond the knee is important because it is related to the sites of cosmic ray
productions and accelerations. In order to perform the composition measurement, an artificial neural network (ANN)
has been implemented, it is based on a set of composition estimators obtained by a detailed study of the lateral particle
density distribution. Showers induced by protons, He nuclei, CNO group and iron nuclei have been generated in the
energy region (30-10000) TeV, the lateral particle density distribution was estimated. In this paper the estimators are
presented, the performance of the mass discrimination is discussed
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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