4th Workshop on Air Shower Detection at High Altitude

31 Jan 2013, 08:00 → 1 Feb 2013, 20:00 Europe/Rome

Aula Magna Partenope (Napoli)

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.

Thursday, 31 January

09:00 → 09:15 Registration

09:15 → 09:30 Welcome Address

09:15 Welcome address from the INFN-Napoli Director

Speaker: Giovanni La Rana (NA)

09:30 → 11:00 Opening Session

09:30 Understanding the origin of Cosmic Rays and High Energy particles in the Milky Way and the Universe

This 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.

Speaker: Paolo Lipari (ROMA1)

Slides LIPARI_Paolo_opening.pdf

10:15 Cosmic Rays and Astrophysics

Speaker: Glennys Farrar

Slides FARRAR_Glennys_Naples013113.pdf

11:00 → 11:20 Coffee break

11:20 → 13:00 The fine structure of CR

11:20 Direct maesurements of Cosmic Rays in space

Speaker: Roberta Sparvoli (ROMA2)

Slides SPARVOLI_Roberta_napoli_2013_final.pdf

11:50 Fermi science results after 4 years in orbit

Speaker: Alessandro Cuoco

Slides CUOCO_Alessandro_Napoli.ppt

12:20 Cosmic Ray physics with ARGO-YBJ

Speaker: Ivan De Mitri (LE)

Slides DEMITRI_Ivan_-4thHighAltitudeWorkshop-2013.pdf

13:00 → 14:00 Lunch break

14:00 → 15:00 The fine structure of CR

14:00 Puzzle of the knee

Speaker: Prof. Anatoly Erlykin (P.N.Lebedev Physical Institute)

Slides ERLYKIN_Anatoly_Puzzle.ppt

14:30 Cosmic Rays with IceCube/Ice Top: spectrum, composition and anisotropy

Speaker: Dr Paolo Desiati (University of Wisconsin - Madison)

Slides DESIATI_Paolo_IceCube.pdf

15:00 → 16:00 The knee regions and beyond

15:00 Cosmic Ray studies, in the 10^16 and 10^18 eV energy range, with the KASCADE-Grande experiment

The 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.

Speaker: Andrea Chiavassa (TO)

Slides CHIAVASSA_Andrea_Napoli2013.pptx

15:30 Tunka Experiment : Cosmic Rays and Gamma Astronomy

Speaker: Leonid Kuzmichev

Slides KUZMICHEV_Leonid_Tunka-neapol-2013.ppt

16:00 → 16:20 Coffee break

16:20 → 18:20 GZK and below

16:20 The Pierre Auger Observatory and its performance

Ultra 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.

Speaker: Dr Corinne Berat (Laboratoire de Physique Subatomique et de Cosmologie (LPSC))

Slides BERAT_Corinne_PierreAugerObs.pdf

16:50 Recent results from the Pierre Auger Observatory

Speaker: Lorenzo Perrone (LE)

Slides PERRONE_Lorenzo_napoli_high_altitude.pdf

17:20 Telescope Array

Speaker: Douglas Bergman

Slides BERGMAN_Douglas__TA-Results-Plans.pdf

17:50 Radioactive UHECR decaying in the sky painting TEV anisotropies

Speaker: Prof. Daniele Fargion (ROMA1)

Slides FARGION_Daniele_NAPLES-31-1-13.ppt

18:20 → 18:30 Coffee break

18:30 → 20:00 Gamma Astronomy

19:00 Overview on TeV Cherenkov experiments

Speaker: Mose' Mariotti

Slides IACT_overview_mariotti.pdf

19:30 Phundamental physics searches with CTA

Ground-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.

Speaker: Michele Doro (PD)

Slides doro_2013_Napoli.pdf

20:30 → 22:30 Social Dinner

La Bersagliera Restaurant
Borgo Marinari 10/11 - 80132 - Napoli - Italia
http://www.labersagliera.it/

Friday, 1 February

09:00 → 10:30 Neutrino Astronomy

09:00 High Energy Neutrino Astronomy

Speaker: Francesco Vissani (LNGS)

Slides vissaniNaples.pdf

09:30 Neutrino telescopes: an overview

Speaker: Paschal Coyle

Slides COYLE_Paschal__nutels-coyle.pptx

10:00 A km3 Cherenkov Neutrino Telescope in the Mediterranean Sea

Speaker: Antonio Capone (ROMA1)

Slides CAPONE_Antonio_2013_02_1_Na_Km3.pptx

10:30 → 10:50 Coffee break

10:50 → 13:00 The High Altitude opportunities I

10:50 Gamma Ray astronomy with ARGO-YBJ

Speaker: Dr Silvia Vernetto (IFSI-INAF)

Slides Vernetto_Silvia__napoli_2013.ppt

11:20 Performance and construction status of the HAWC Observatory

The 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.

Speaker: Andrew Smith

Abstract HAWC.rtf

Slides SMITH_Andrew_HAWC_Naples_2013.pptx

11:50 LAWCA : a TeV Gamma Ray observatory implemented with at water Cherenkov array at YBJ

Speaker: HuiHai He

Slides HE_Huihai_LAWCA.pptx

12:25 The 'Pamir-XXI' project

Speaker: Alexander Borisov

Slides BORISOV_Alexander__Pamir-XXI_Complex_Setup_Napoli2013.ppt

13:00 → 14:00 Lunch break

14:00 → 15:00 Interaction models

14:00 Forward particle production measured by LHCf; testing hadronic interaction models for Cosmic Ray physics

Uncertainty 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.

Speaker: Takashi Sako

Slides SAKO_Takahasci__HighAltAS_Napoli2013_LHCf_sako.pptx

14:30 Hadronic interaction models in air showers simulations: updates based on recent LHC data

We 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.

Speaker: Hans Dembinski

Slides DEMBINSKI_Hans.pdf

15:00 → 17:25 The High Altitude opportunities II

15:00 Introduction to LHAASO

Speaker: Zhen Cao

Slides LHAASO-Naples.pptx

15:10 Hybrid measurement of cosmic rays at the knee region with LHAASO

Speaker: Ma Xinhua

Slides MA_Xinhua__Napoli20130131.pdf

15:40 Measurement of Cosmic Rays with LHAASO at 10PeV - 100PeV

Speaker: Lingling Ma

Slides MA_Lingling_Measurement_of_Cosmic_rays_with___LHAASO_at_10PeV~100PeV.ppt

16:00 The measurement of Cosmic Ray around EeV region with LHAASO telecopes

Speaker: Min Zha

Slides ZHA_Min_LHAASO-SubEeV-20130201.ppt

16:25 Hybrid measurement of Cosmic Ray light component spectrum by using ARGO-YBJ detector and Cherenkov telescope

Using 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.

Speaker: Shoushan Zhang

Slides ZHANG_Shoushan__WFCTA-ARGO_cosmic_ray_light_component_energy_spectrum.pptx

17:00 LHAASO: electronics developments

Speaker: Ying Tao Chen

Slides CHEN_Yintao_Naples20130201b.ppt

17:25 → 17:40 Coffee break

17:40 → 18:40 Summary talks

17:40 Cosmic Rays and Neutrinos

Speaker: Paolo Lipari (ROMA1)

18:10 Cosmic Rays and Gamma Astronomy

Speaker: Zhen Cao

Slides LHC-Era-CR-summary.ppt