scholarly journals The GRAND project and GRANDProto300 experiment

2019 ◽  
Vol 210 ◽  
pp. 06007
Author(s):  
Olivier Martineau-Huynh
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
High Energy ◽  
Point Sources ◽  
Ultra High Energy ◽  
Air Showers ◽  
High Energy Cosmic Rays ◽  
Complete Measurement ◽  
Neutrino Astronomy ◽  
The Universe

The Giant Array for Neutrino Detection (GRAND) is a proposal for a giant observatory of ultra-high energy cosmic particles (neutrinos, cosmic rays and gamma rays). It will be composed of twenty subarrays of 10 000 antennas each, totaling a detection area of 200 000 km2. GRAND will reach unprecedented sensitivity to neutrinos allowing to detect cosmogenic neutrinos while its sub-degree angular resolution will also make it possible to hunt for point sources and possibly start neutrino astronomy. Combined with its gigantic exposure to ultra-high energy cosmic rays and gamma rays, GRAND will be a powerful tool to solve the century-long mistery of the nature and origin of the particles with highest energy in the Universe. On the path to GRAND, the GRANDProto300 experiment will be deployed in 2020 over a total area of 200 km2. It primarly aims at validating the detection concept of GRAND, but also proposes a rich science program centered on a precise and complete measurement of the air showers initiated by cosmic rays with energies between 1016.5 and 1018 eV, a range where we expect to observe the transition between the Galactic and extra-galactic origin of cosmic rays.

scholarly journals ULTRA HIGH ENERGY COSMIC RAYS: ORIGIN AND PROPAGATION

2010 ◽  
Vol 25 (18) ◽  
pp. 1467-1481 ◽  
Author(s):  
TODOR STANEV
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Cosmic Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Ultrahigh Energy ◽  
High Energy Cosmic Rays ◽  
Astrophysical Objects ◽  
Ultrahigh Energy Cosmic Rays ◽  
The Universe

We introduce the highest energy cosmic rays and briefly review the powerful astrophysical objects where they could be accelerated. We then introduce the interactions of different cosmic ray particles with the photon fields of the Universe and the formation of the cosmic ray spectra observed at Earth. The last topic is the production of secondary gamma rays and neutrinos in the interactions of the ultrahigh energy cosmic rays.

scholarly journals Radio detection in the multi-messenger context

2019 ◽  
Vol 207 ◽  
pp. 03005
Author(s):  
D. Kostunin
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Cosmic Radiation ◽  
High Energy ◽  
Ultra High Energy ◽  
Future Prospects ◽  
Air Showers ◽  
Digital Radio ◽  
High Energy Cosmic Rays ◽  
Radio Detection

The present work discusses the development of the radio technique for detection of ultra-high energy air-showers induced by cosmic radiation, and the prospects of its application in the future multi-messenger activities, particularly for detection of ultra-high energy cosmic rays, gamma rays and neutrinos. It gives an overview of the results achieved by the modern digital radio arrays, as well as discuss present challenges and future prospects.

scholarly journals Ultra High Energy Cosmic Rays: Origin, Composition and Spectrum

2019 ◽  
Vol 209 ◽  
pp. 01018
Author(s):  
Roberto Aloisio
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Theoretical Models ◽  
High Energy ◽  
Experimental Results ◽  
Mass Composition ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Secondary Particles

The physics of Ultra High Energy Cosmic Rays will be reviewed, discussing the latest experimental results and theoretical models aiming at explaining the observations in terms of spectra, mass composition and possible sources. It will be also discussed the emission of secondary particles such as neutrinos and gamma rays produced by the interaction of Ultra High Energy Cosmic Rays with astrophysical photon backgrounds. The content of the present proceeding paper is mainly based on the review papers [1, 2].

scholarly journals The hadronic interaction model Sibyll 2.3c and muon production in extensive air-showers

2019 ◽  
Vol 208 ◽  
pp. 11002 ◽  
Author(s):  
Felix Riehn ◽  
Ralph Engel ◽  
Anatoli Fedynitch ◽  
Thomas K. Gaisser ◽  
Todor Stanev
Keyword(s):  
Cosmic Rays ◽  
Interaction Model ◽  
High Energy ◽  
Extensive Air Showers ◽  
Ultra High Energy ◽  
Air Showers ◽  
Hadronic Interaction ◽  
High Energy Cosmic Rays ◽  
Muon Production

One of the applications of the hadronic interaction model Sibyll is the simulation of extensive air showers of ultra-high energy cosmic rays. In recent years it has become more and more clear that simulations do not agree with measurements when it comes to observables related to muons in air showers. We discuss the processes in Sibyll that are directly related to muon production in extensive air showers and describe their relation to shower observables.

scholarly journals CODALEMA: A COSMIC RAY AIR SHOWER RADIO DETECTION EXPERIMENT

2006 ◽  
Vol 21 (supp01) ◽  
pp. 192-196 ◽  
Author(s):  
D. ARDOUIN ◽  
A. BELLETOILE ◽  
D. CHARRIER ◽  
R. DALLIER ◽  
L. DENIS ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Cosmic Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Air Showers ◽  
Detection Experiment ◽  
Transient Signals ◽  
High Energy Cosmic Rays ◽  
Air Shower ◽  
Radio Detection

The CODALEMA experimental device currently detects and characterizes the radio contribution of cosmic ray air showers : arrival directions and electric field topologies of radio transient signals associated to cosmic rays are extracted from the antenna signals. The measured rate, about 1 event per day, corresponds to an energy threshold around 5.1016eV. These results allow to determine the perspectives offered by the present experimental design for radiodetection of Ultra High Energy Cosmic Rays at a larger scale.

scholarly journals CHASING THE GZK WITH HiRes

2003 ◽  
Vol 18 (18) ◽  
pp. 1235-1245 ◽  
Author(s):  
DOUGLAS R. BERGMAN
Keyword(s):  
Energy Spectrum ◽  
Cosmic Rays ◽  
Energy Loss ◽  
High Energy ◽  
Cosmological Evolution ◽  
Similar Distribution ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Luminous Matter ◽  
The Universe

The HiRes collaboration has recently announced preliminary measurements of the energy spectrum of ultra-high energy cosmic rays (UHECR), as seen in monocular analyses from each of the two HiRes sites. This spectrum is consistent with the existence of the GZK cutoff, as well other aspects of the energy loss processes that cause the GZK cutoff. Based on the analytic energy loss formalism of Berezinsky et al., the HiRes spectra favor a distribution of extragalactic sources that has a similar distribution to that of luminous matter in the universe, both in its local over-density and in its cosmological evolution.

scholarly journals The Pierre Auger Observatory: Studying the Highest Energy Frontier

2019 ◽  
Vol 64 (7) ◽  
pp. 646
Author(s):  
I. Valiño
Keyword(s):  
Cosmic Rays ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Quality Data ◽  
Ultra High Energy ◽  
High Quality ◽  
High Quality Data ◽  
High Energy Cosmic Rays ◽  
Energy Frontier ◽  
The Universe

We highlight the main results obtained by the Pierre Auger Collaboration in its quest to unveil the mysteries associated with the nature and origin of the ultra-high energy cosmic rays, the highest-energy particles in the Universe. The observatory has steadily produced high-quality data for more than 15 years, which have already led to a number of major breakthroughs in the field contributing to the advance of our understanding of these extremely energetic particles. The interpretation of our measurements so far opens new questions which will be addressed by the on-going upgrade of the Pierre Auger Observatory.

scholarly journals Air showers, hadronic models, and muon production

2019 ◽  
Vol 210 ◽  
pp. 02007
Author(s):  
S. J. Sciutto
Keyword(s):  
Cosmic Rays ◽  
Simulated Data ◽  
High Energy ◽  
Simulation System ◽  
Experimental Measurements ◽  
Ultra High Energy ◽  
Air Showers ◽  
High Energy Cosmic Rays ◽  
Air Shower ◽  
Muon Production

We report on a study about some characteristics of muon production during the development of extended air showers initiated by ultra-high-energy cosmic rays. Using simulations with the recent new version of the AIRES air shower simulation system, we analyze and discuss on the observed discrepancies between experimental measurements and simulated data.

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