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4th Workshop on Air Shower Detection at High Altitude
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Europe/Rome
Aula Magna Partenope (Napoli)
Aula Magna Partenope
Napoli
Centro Congressi Partenope
Via Partenope 36, Napoli
Descrizione
Since 100 years from their discovery the Cosmic Rays (CR) remain still obscure in their origin, nevertheless many news are coming and the panorama is becoming more and more intriguing and inviting for researchers thanks to the powerful detectors that are in operation and to the planned experiments.
Starting from the problem of their origin and the hunting for CR sources, the IV edition of the workshop will offer the opportunity to review the many interesting results on CR that have recently been reported. The related subjects of Gamma Rays and Neutrinos will be considered within the frame of the CR origin. Considering the harvest of results on hadronic interactions provided by LHC, a session will be devoted to the interaction codes and data interpretation. Also detection techniques aiming to solve key problems or relevant to the proposed experiments will be discussed.
Special attention will be paied to ground-based experiments, in particular to the ones at high altitude, either planned like HAWC, LAWCA, LHAASO, PAMIR XXI or in operation like ARGO-YBJ, and TIBET ASg.
Starting from the problem of their origin and the hunting for CR sources, the IV edition of the workshop will offer the opportunity to review the many interesting results on CR that have recently been reported. The related subjects of Gamma Rays and Neutrinos will be considered within the frame of the CR origin. Considering the harvest of results on hadronic interactions provided by LHC, a session will be devoted to the interaction codes and data interpretation. Also detection techniques aiming to solve key problems or relevant to the proposed experiments will be discussed.
Special attention will be paied to ground-based experiments, in particular to the ones at high altitude, either planned like HAWC, LAWCA, LHAASO, PAMIR XXI or in operation like ARGO-YBJ, and TIBET ASg.
Partecipanti
Alessandro Cuoco
Anatoly Erlykin
Andrea Chiavassa
Andrew Smith
Antonio Capone
Beatrice Panico
Bing-Kai Zhang
Corinne Bérat
Cristina Mattone
daniele fargion
Douglas Bergman
Fengrong Zhu
Francesco Vissani
Gianfranca De Rosa
Giovanni Marsella
Giuseppe Di Sciascio
Giuseppe Longo
Glennys Farrar
Hans Dembinski
HUANG Weiping
Huihai He
Ivan De Mitri
Leonid Kuzmichev
Lingling Ma
Lorenzo Perrone
Marco Tavani
Michele Doro
Michele IACOVACCI
Min Zha
Mosè Mariotti
Paolo Lipari
Paschal Coyle
Pasquale Migliozzi
Roberta Sparvoli
Sergio Catalanotti
Shoushan Zhang
simona cafieri
Stefano Mari
Stefano Mastroianni
Takashi SAKO
Tiina SUOMIJARVI
Tristano Di Girolamo
Vernetto Silvia
Xinhua Ma
Yingtao CHEN
Zhen Cao
Support
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Registration
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Welcome Address
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1
Welcome address from the INFN-Napoli DirectorRelatore: Giovanni La Rana (NA)
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1
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Opening Session
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2
Understanding the origin of Cosmic Rays and High Energy particles in the Milky Way and the UniverseThis talk will attempt to briefly discuss the status of our understanding of the production of cosmic rays and high energy particles in the Milky Way and the universe, and the most promising observational methods to address the problems that remain open.Relatore: Paolo Lipari (ROMA1)
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2
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11:00
Coffee break
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13:00
Lunch break
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The knee regions and beyond
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9
Cosmic Ray studies, in the 10^16 and 10^18 eV energy range, with the KASCADE-Grande experimentThe KASCADE-Grande experiment concluded the data taking in November 2012. In this contribution I will present and discuss the analysis performed on the study of the all particle spectrum and on the primary chemical composition. The more important results as the structures observed in the all particle primary spectrum and the change of slope of the spectrum of the heavy primary component will be highlighted.Relatore: Andrea Chiavassa (TO)
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9
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16:00
Coffee break
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GZK and below
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11
The Pierre Auger Observatory and its performanceUltra High Energy Cosmic Rays (UHECR) represent the most energetic elementary particles available to scientists. They have macroscopic energies, exceeding 1 EeV, but their flux is very weak, one particle per century per square kilometre for the highest energies. Understanding their nature and origin is the objective of the Pierre Auger Observatory, which is located in the province of Mendoza (Argentina) and covers 3000 km2, being the largest cosmic ray detector in operation. Designed as a hybrid detector, it uses two techniques to measure the properties of extensive air showers by observing both their longitudinal development in the atmosphere with fluorescence detectors and their lateral spread at ground level with particle detectors. The combination of information from the two detector types enhances the reconstruction performance with respect to the individual detector components. The power of the hybrid detection and the high statistics of the surface detector bring valuable performances to measure the extended air showers with unprecedented precision. The collaboration has extended the Observatory with several complementary detection systems, which lower the energy threshold of the baseline detectors from 1 EeV to 0.1 EeV; the potential of radio-detection techniques to measure extensive air showers is studied at the Observatory site.Relatore: Dr. Corinne Berat (Laboratoire de Physique Subatomique et de Cosmologie (LPSC))
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11
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18:20
Coffee break
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Gamma Astronomy
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16
Phundamental physics searches with CTAGround-based Imaging Cherenkov Telescopes (IACTs) are gamma-ray detectors for non-thermal phenomena in the VHE range (GeV-TeV). Moved by the success of the current generation of experiments, a new great project of world-wide scale is being run, dubbed CTA (Cherenkov Telescope Array). Besides gamma-ray astronomy, IACTs can also be used as observatories for fundamental physics searches (dark matter, quantum gravity, axion-like particles), and even as cosmic-ray detectors (electrons, heavy nuclei), neutrino detectors (tau-induced showers) or detector for other exotic particles. In this presentation, I will briefly present the nature and statu of the CTA project and discuss some predictions for fundamental physic searches.Relatore: Michele Doro (PD)
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Social Dinner
La Bersagliera Restaurant
Borgo Marinari 10/11 - 80132 - Napoli - Italia
http://www.labersagliera.it/
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10:30
Coffee break
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The High Altitude opportunities I
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21
Performance and construction status of the HAWC ObservatoryThe High-Altitude Water Cherenkov (HAWC) Observatory is a TeV gamma-ray observatory currently under construction at a 4100m a.s.l. site in central Mexico. HAWC is made up of 300 188,000 liter water tanks, each instrumented with 4 PMTs. The full HAWC detector will be sensitive enough to detect the Crab with a significance of 7 sigma in a single transit, about 15 times more sensitive than Milagro. I will review the status of the HAWC detector and show initial results from the first 30 instrumented tanks. I will also review the design optimization and and sensitivity estimation procedure.Relatore: Andrew Smith
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13:00
Lunch break
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Interaction models
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24
Forward particle production measured by LHCf; testing hadronic interaction models for Cosmic Ray physicsUncertainty in the hadronic interaction models is one of the most important sources of the difficulty to interpret cosmic-ray air shower data. Large Hadron Collider at CERN can provide the best opportunity to test and improve the models at the maximum laboratory energy of 10^17eV. In this talk, some key observations from the LHC experiments are reviewed. Among them detail of a dedicated experiment motivated for the cosmic-ray physics, LHC forward (LHCf), will be presented. The results from the 900GeV and 7TeV proton-proton collisions are presented together with a short introduction of the experiment and on going and future plans.Relatore: Takashi Sako
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25
Hadronic interaction models in air showers simulations: updates based on recent LHC dataWe will give an introductory overview on hadronic interaction models used for simulations of air showers and their predictions. Emphasis will be put on QGSJet and EPOS. The development of hadronic interaction models is promoted by recent data from the LHC, which has a dedicated observation program for forward-physics. Hadronic interactions which produce particles close to the beam line are most relevant for the simulation of air showers. We will show how this data changed the predictions for air shower observables and how it brought them closer together.Relatore: Hans Dembinski
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24
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The High Altitude opportunities II
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30
Hybrid measurement of Cosmic Ray light component spectrum by using ARGO-YBJ detector and Cherenkov telescopeUsing two Wide Field-of-view Cherenkov Telescopes and the RPC array in the ARGO-YBJ experiment at 4300m a.s.l., cosmic hydrogen and helium nuclei above 100 TeV have been well separated from the all cosmic rays. The image shape measured by the Cherenkov telescopes and the lateral distributions of shower particles in few meters from the cores measured by the RPC array provide sufficient sensitivity to tag showers as induced by nuclei not heavier than helium. The flux of those nuclei as a function of shower energy up to 800 TeV is measured. A very uniform energy resolution about 25% throughout the whole energy range is achieved by combining the well measured geometric parameters by the fully covered RPC array and the Cherenkov photon fluxes by the telescopes. This results in a natural extension of the spectrum measurement by the ARGO-YBJ experiment above 5 TeV which has a good agreement with the CREAM experiment. From 100 to 800 TeV, the spectral index is found to be -2.69 ± 0.06, agreeing with the ARGO-YBJ result. No significant structure in the spectrum has been observed after combine both results.Relatore: Shoushan Zhang
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17:25
Coffee break
