Dr
Isabella Amore
(INFN-LNS)
23/04/2008 08:30
Parallel Session on Physics
Contributed talk
The NEMO collaboration, in order to validate the technologies for the future km3-scale underwater neutrino detector, realized a technological demonstrator, called “NEMO Phase-1”. In December 2006 it was deployed at the NEMO Test-Site (2000 m depth, 25 km offshore Catania). The demonstrator includes prototypes of the critical elements of the proposed km3-scale detector: a small-scale tower...
M.
Francisco Salesa
(IFIC-Valencia)
23/04/2008 08:50
Parallel Session on Physics
Contributed talk
The ANTARES collaboration has almost completed the construction of an underwater neutrino telescope located at 2500 km depth, 40 km away from the Toulon coast in France. The final detector will consist of 900 photomultipliers (PMTs) distributed in 12 lines. At present, the deployed detector is the largest neutrino telescope in the northern hemisphere. The aim of ANTARES is the detection of...
Annarita Margiotta
(Sezione INFN and Universita' Bologna)
23/04/2008 09:10
Parallel Session on Physics
Contributed talk
The Antares detector was operated in a configuration with 5 lines for a period of 10 months from Feb 2007 until Nov 2007. The duty cycle was better than 80%. During this period almost 2 10^7 atmospheric muon triggers were collected. This large sample was used to test Monte Carlo simulation programs and to evaluate possible systematic effects due to uncertainties on environmental parameters and...
Dr
Rosario Megna
(INFN Bari)
23/04/2008 09:30
Parallel Session on Physics
Contributed talk
The results of Monte Carlo simulation studies of the timing calibration accuracy required by the NEMO underwater neutrino telescope are presented. The NEMO Collaboration is conducting a long term R&D activity toward the installation of a km3 apparatus in the Mediterranean Sea. An optimal site has been found and characterized at 3500 m depth off the Sicilian coast. Monte Carlo simulation shows...
R Auer
(Erlangen Centre for Astroparticle Physics)
23/04/2008 09:50
Parallel Session on Physics
Contributed talk
In order to achieve optimal angular resolution in searchers for neutrino point sources, neutrino telescopes are optimised for the detection and reconstruction of muon tracks, thus concentrating on muon-(anti)neutrino charged-current reactions. However, the efficiency for detecting neutrinos can be improved significantly by investigating also reaction channels containing a hadronic and/or...
Dr
Jean-Pierre Ernenwein
(Université de Haute Alsace)
23/04/2008 10:10
Parallel Session on Physics
Contributed talk
The "HEllenic LYceum Cosmic Observatories Network" (HELYCON) collaboration is constructing a network of detector stations dedicated to the study of Extensive Air Showers. The use of HELYCON detectors is also envisaged for the calibration of a cubic kilometer scale Mediterranean neutrino telescope by means of an array of these detectors at the sea surface. The ANTARES framework is well-suited...
Dr
Apostolos Tsirigotis
(Hellenic Open University)
23/04/2008 10:50
Parallel Session on Physics
Contributed talk
Event reconstruction in underwater neutrino telescopes suffers from a high background noise due to the $K^{40}$ decays. Adaptive algorithms are able to suppress automatically such a noise and therefore are considered as good candidates for track fitting at the KM3NeT environment. Adaptive algorithms, based on Kalman Filter methods, are extensively used in accelerator particle physics...
Prof.
Maurizio Spurio
(University of Bologna)
23/04/2008 11:10
Parallel Session on Physics
Contributed talk
Atmospheric muons play an important role in underwater/ice neutrino detectors, because they provide the most abundant source of events for calibration and test. On the other side, they represent the major background source. A fast Monte Carlo generator (called MUPAGE) of bundles of atmospheric muons for underwater/ice neutrino telescopes is presented. It produces the event kinematics on the...
Dr
Rosa Coniglione
(INFN-Laboratori Nazionali del Sud)
23/04/2008 11:30
Parallel Session on Physics
Contributed talk
The KM3NeT collaboration is approaching the phase of definition of a technical project for a high energy neutrino telescope to be installed in the Mediterranean sea. In this phase MonteCarlo simulations can give constraints on some important parameters for a technical design of the detector. In this contribution the performance of a detector made of tree-dimensional structures hosting the...
Piera Sapienza
(INFN-LNS)
23/04/2008 11:50
Parallel Session on Physics
Contributed talk
The KM3NeT collaboration aims to realize in the Mediterranean Sea a high energy neutrino telescope that will be optimized for muon neutrinos in the energy range between 1 TeV and 1 PeV. From 1 TeV to several tens of TeV only up-going neutrinos can be unambiguously identified due to the overwhelming presence of the atmospheric muons. However, at energies larger than 100 TeV, neutrinos are...
Dr
Rezo Shanidze
(ECAP/University of Erlangen)
23/04/2008 12:10
Parallel Session on Physics
Contributed talk
KM3NeT neutrino telescope configurations with different detector components and geometry have been simulated and studied with modified ANTARES software. The physics performance of KM3NeT will be characterised by two parameters: neutrino effective area and angular resolution of the reconstructed muons. These two benchmark parameters are determined and compared for the different simulated KM3NeT...
M.
Claudio Kopper
(Erlangen Centre of Astroparticle Physics (ECAP), University of Erlangen, Germany)
23/04/2008 12:30
Parallel Session on Physics
Contributed talk
Large-scale experiments like KM3NeT require an immense amount of collaborative work to create and maintain their analysis software. The complete chain of reconstruction tools has to be modular and adhere to a pre-defined data flow. Additionally, the source code must be modular to ease its development and maintenance. A software set-up implementing these points does not only allow a large group...
Maya Stavrianakou
(NOA/NESTOR)
23/04/2008 12:50
Parallel Session on Physics
Contributed talk
The KM3Net experiment data arrive on shore where they are processed in real time at a Data Filter Farm and are subsequently stored and backed up at a central computing centre located on site. From there we propose a system whereby the data are distributed to participating institutes equipped with large computing centres for further processing, duplication and distribution to smaller centres....
Dr
Andrew Taylor
(MPIK)
23/04/2008 14:20
Parallel Session on Physics
Contributed talk
Following the Milagro detection of multi-TeV gamma-rays from both the Cygnus and central Galactic regions, we investigate the consequences of a hadronic origin for this large scale diffuse emission. We demonstrate that such observations are highly relevant to the predictions of detectable fluxes by upcoming km3 neutrino-detectors. The possibility for a verification of a hadronic origin model...
Alexander Kappes
(UW-Madison)
23/04/2008 14:40
Parallel Session on Physics
Contributed talk
We quantitatively address whether IceCube, a kilometer-scale neutrino detector under construction at the South Pole, can observe neutrinos pointing back at the accelerators of the Galactic cosmic rays. The photon flux from candidate sources identified by the Milagro detector in a survey of the TeV sky is consistent with the flux expected from a typical cosmic-ray generating supernova remnant...
Dr
Rezo Shanidze
(ECAP/University of Erlangen)
23/04/2008 15:00
Parallel Session on Physics
Contributed talk
A very large volume Mediterranean neutrino telescope (KM3NeT), designed and optimised for detection of Cherenkov light from interactions of neutrinos with energies above about 100 GeV, could be sensitive to an intense neutrino burst from the core collapse of a massive star in our Galaxy. In a short time interval during the burst (~10 s) the total amount of Cherenkov photons produced by...
Damien Dornic
(CPPM)
23/04/2008 15:20
Parallel Session on Physics
Contributed talk
Gamma-ray bursts (GRB) are powerful and highly variable sources of gamma rays that indicate the existence of cosmic particle accelerators. Under the assumption of hadronic acceleration in the jet, the expected neutrino energy spectrum is derived according to the intrinsic fireball model parameters and to the observed electromagnetic data of GRBs measured with ground-based and satellite...
