The Experts below are selected from a list of 114 Experts worldwide ranked by ideXlab platform
E Lorenz - One of the best experts on this subject based on the ideXlab platform.
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methods for determining the primary energy of Cosmic Ray Showers
Journal of Physics G, 1997Co-Authors: J Cortina, F Arqueros, E LorenzAbstract:Monte Carlo simulations of Cosmic-Ray-induced Showers in the atmosphere have been used to develop three new methods for measuring the energy of the primary particles in the - eV range independently of the particle species. Both the electron number and Cherenkov light density near and beyond the hump in the lateral distributions are found to accurately indicate the primary energy, provided an appropriate correction based on the depth of the shower maximum is applied. The depth of the shower maximum can be estimated from the slope of the radial distribution of the Cherenkov light. In addition, a simultaneous measurement of the muon number and Cherenkov light intensity also provides a very accurate measure of the primary energy. All of these parameters can be determined by using existing particle detector arRays. A very precise measurement of the Cosmic-Ray all-particle spectrum regardless of chemical composition is thus shown to be practicable.
P. Lipari - One of the best experts on this subject based on the ideXlab platform.
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concepts of age and universality in Cosmic Ray Showers
Physical Review D, 2009Co-Authors: P. LipariAbstract:The concept of ``age'' as a parameter for the description of the state of development of high energy Showers in the atmosphere has been in use in Cosmic Ray studies for several decades. In this work we briefly discuss how this concept, originally introduced to describe the average behavior of electromagnetic cascades, can be fruitfully applied to describe individual Showers generated by primary particles of different nature, including protons, nuclei and neutrinos. Showers with the same age share three different important properties: (i) their electron size has the same fractional rate of change with increasing depth, (ii) the bulk of the electrons and photons in the shower (excluding high energy particles) have energy spectra with shapes and relative normalization uniquely determined by the age parameter, and (iii) the electrons and photons in the shower have also the same angular and lateral distributions sufficiently far from the shower axis. In this work we discuss how the properties associated with the shower age can be understood with simple arguments, and how the shapes of the electron and photon spectra and the relative normalization that correspond to a certain age can be calculated analytically.
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A ‘flexible’ Monte Carlo code for the simulation of extremely high energy Cosmic Ray Showers
Nuclear Physics B - Proceedings Supplements, 1997Co-Authors: P. LipariAbstract:We discuss the usefulness of a ‘flexible’ Monte Carlo code for the description of the highest energy Cosmic Ray Showers. Such a code should be able to simulate different hypothetical features of hadronic interactions and would help to explore the model dependence of high energy Cosmic Ray results. A tool of this type would be very useful to study the ‘unexpected’.
Semir Sarajlic - One of the best experts on this subject based on the ideXlab platform.
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Computational Challenges and Opportunities of Simulating Cosmic Ray Showers at Global Scale
arXiv: Computational Physics, 2018Co-Authors: Olesya Sarajlic, Semir Sarajlic, Xiaochun HeAbstract:Galactic Cosmic Rays are the high-energy particles that stream into our solar system from distant corners of our Galaxy and some low energy particles are from the Sun which are associated with solar flares. The Earth atmosphere serves as an ideal detector for the high energy Cosmic Rays which interact with the air molecule nuclei causing propagation of extensive air Showers. In recent years, there are growing interests in the applications of the Cosmic Ray measurements which range from the space/earth weather monitoring, homeland security based on the Cosmic Ray muon tomography, radiation effects on health via air travel, etc. A simulation program (based on the GEANT4 software package developed at CERN) has been developed at Georgia State University for studying the Cosmic Ray Showers in atmosphere. The results of this simulation study will provide unprecedented knowledge of the geo-position-dependent Cosmic Ray shower profiles and significantly enhance the applicability of the Cosmic Ray applications. In the paper, we present the computational challenges and the opportunities for carrying out the Cosmic Ray shower simulations at the global scale using various computing resources including XSEDE.
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PEARC - Computational Challenges and Opportunities of Simulating Cosmic Ray Showers at Global Scale
Proceedings of the Practice and Experience on Advanced Research Computing - PEARC '18, 2018Co-Authors: Olesya Sarajlic, Xiaochun He, Semir SarajlicAbstract:Galactic Cosmic Rays are the high-energy particles that stream into our solar system from distant corners of our Galaxy and some low energy particles are from the Sun which are associated with solar flares. The Earth atmosphere serves as an ideal detector for the high energy Cosmic Rays which interact with the air molecule nuclei causing propagation of extensive air Showers. In recent years, there are growing interests in the applications of the Cosmic Ray measurements which range from the space/earth weather monitoring, homeland security based on the Cosmic Ray muon tomography, radiation effects on health via air travel, etc. A simulation program (based on the GEANT4 software package developed at CERN) has been developed at Georgia State University for studying the Cosmic Ray Showers in atmosphere. The results of this simulation study will provide unprecedented knowledge of the geo-position-dependent Cosmic Ray shower profiles and significantly enhance the applicability of the Cosmic Ray applications. In the paper, we present the computational challenges and the opportunities for carrying out the Cosmic Ray shower simulations at the global scale using various computing resources including XSEDE.
Xiaochun He - One of the best experts on this subject based on the ideXlab platform.
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Computational Challenges and Opportunities of Simulating Cosmic Ray Showers at Global Scale
arXiv: Computational Physics, 2018Co-Authors: Olesya Sarajlic, Semir Sarajlic, Xiaochun HeAbstract:Galactic Cosmic Rays are the high-energy particles that stream into our solar system from distant corners of our Galaxy and some low energy particles are from the Sun which are associated with solar flares. The Earth atmosphere serves as an ideal detector for the high energy Cosmic Rays which interact with the air molecule nuclei causing propagation of extensive air Showers. In recent years, there are growing interests in the applications of the Cosmic Ray measurements which range from the space/earth weather monitoring, homeland security based on the Cosmic Ray muon tomography, radiation effects on health via air travel, etc. A simulation program (based on the GEANT4 software package developed at CERN) has been developed at Georgia State University for studying the Cosmic Ray Showers in atmosphere. The results of this simulation study will provide unprecedented knowledge of the geo-position-dependent Cosmic Ray shower profiles and significantly enhance the applicability of the Cosmic Ray applications. In the paper, we present the computational challenges and the opportunities for carrying out the Cosmic Ray shower simulations at the global scale using various computing resources including XSEDE.
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PEARC - Computational Challenges and Opportunities of Simulating Cosmic Ray Showers at Global Scale
Proceedings of the Practice and Experience on Advanced Research Computing - PEARC '18, 2018Co-Authors: Olesya Sarajlic, Xiaochun He, Semir SarajlicAbstract:Galactic Cosmic Rays are the high-energy particles that stream into our solar system from distant corners of our Galaxy and some low energy particles are from the Sun which are associated with solar flares. The Earth atmosphere serves as an ideal detector for the high energy Cosmic Rays which interact with the air molecule nuclei causing propagation of extensive air Showers. In recent years, there are growing interests in the applications of the Cosmic Ray measurements which range from the space/earth weather monitoring, homeland security based on the Cosmic Ray muon tomography, radiation effects on health via air travel, etc. A simulation program (based on the GEANT4 software package developed at CERN) has been developed at Georgia State University for studying the Cosmic Ray Showers in atmosphere. The results of this simulation study will provide unprecedented knowledge of the geo-position-dependent Cosmic Ray shower profiles and significantly enhance the applicability of the Cosmic Ray applications. In the paper, we present the computational challenges and the opportunities for carrying out the Cosmic Ray shower simulations at the global scale using various computing resources including XSEDE.
J Cortina - One of the best experts on this subject based on the ideXlab platform.
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methods for determining the primary energy of Cosmic Ray Showers
Journal of Physics G, 1997Co-Authors: J Cortina, F Arqueros, E LorenzAbstract:Monte Carlo simulations of Cosmic-Ray-induced Showers in the atmosphere have been used to develop three new methods for measuring the energy of the primary particles in the - eV range independently of the particle species. Both the electron number and Cherenkov light density near and beyond the hump in the lateral distributions are found to accurately indicate the primary energy, provided an appropriate correction based on the depth of the shower maximum is applied. The depth of the shower maximum can be estimated from the slope of the radial distribution of the Cherenkov light. In addition, a simultaneous measurement of the muon number and Cherenkov light intensity also provides a very accurate measure of the primary energy. All of these parameters can be determined by using existing particle detector arRays. A very precise measurement of the Cosmic-Ray all-particle spectrum regardless of chemical composition is thus shown to be practicable.
