Paolo Privitera
(Dipartimento di Fisica(RomaII))
13/02/2012, 15:00
Prof.
Pasquale Blasi
13/02/2012, 16:15
Venya Berezinsky
(INFN Laboratori Nazionali del Gran Sasso)
13/02/2012, 16:50
Dr
Tanguy Pierog
(KIT)
13/02/2012, 17:25
Anatoly Ivanov
(Shafer Institute for Cosmophysical Research & Aeronomy)
14/02/2012, 09:50
The results of the Yakutsk array experiment aimed at investigations of ultra-high energy cosmic rays are presented. We outline the current status of the instrument and an outlook for future directions and areas of study.
Yoshiki Tsunesada
(Tokyo Institute of Technology)
14/02/2012, 10:10
Dr
Bianca Keilhauer
(KIT)
14/02/2012, 10:50
Extensive air showers initiate the fluorescence emissions from nitrogen molecules in air. The UV-light is emitted isotropically and can be used for observing the longitudinal development of extensive air showers in the atmosphere over many kilometers. This measurement technique is well established since it has been used since many decades by several cosmic ray experiments. However, a...
Michael Unger
(KIT - Karlsruhe Institute of Technology (DE))
14/02/2012, 11:30
In this presentation we will discuss measurements of the longitudinal development of air showers at the Pierre Auger Observatory. The longitudinal development can be directly observed by the fluorescence telescopes of Auger and we will present the results on the evolution of the average of the shower maximum and its fluctuations as a
function of energy. Moreover, two observables from the...
Yuichiro Tameda
(Institute for Cosmic Ray Research, University of Tokyo)
14/02/2012, 11:50
In order to clarify the origin of ultra high energy cosmic rays (UHECRs),
it is very important to determine the mass composition.
The most effective strategy to determine the mass composition is
Xmax technique.
Xmax is the atmospheric depth of air shower maximum measured by
fluorescence detectors (FDs).
HiRes has reported Xmax measurement by FDs which indicated
proton dominated mass...
Dr
Jose Bellido
(The University of Adelaide)
14/02/2012, 12:10
Jonathan R. Ellis
(CERN)
14/02/2012, 14:00
Prof.
Yoshitaka Itow
(Nagoya University)
14/02/2012, 14:40
Gaku Mitsuka
(Nagoya University (JP))
14/02/2012, 15:20
The Large Hadron Collider forward experiment measured very forward neutral
particle spectra in LHC proton-proton collisions in early 2010.
In this talk we will discuss the energy and transverse momentum spectra of neutral pion at the 7TeV proton-proton collision, and also present the inclusive photon energy spectra taken at the 900GeV collisions.
The spectra in both collision energy are...
Prof.
Paolo Lipari
(Universita di Roma I)
14/02/2012, 15:40
This contribution discusses possible methods to measure
the proton-proton total cross section from observations
of Ultra High Energy cosmic rays, and the theoretical
uncertainties associated with these methods.
Dr
Ralf Matthias Ulrich
(KIT - Karlsruhe Institute of Technology (DE))
14/02/2012, 16:30
Authorship: The Pierre Auger Collaboration.
Using the tail of the distribution of the depth of shower maxima
observed with the Pierre Auger Observatory, we derive an estimate of
the proton-air cross section for particle production at center-of-mass
energies of 57 TeV. Air showers observed with the fluorescence
detector and at least one station of the surface array are analyzed in
the...
Prof.
Glennys Farrar
(New York University)
14/02/2012, 17:10
Ultrahigh energy cosmic rays (UHECRs) are the highest energy particles in the Universe, recorded to have energies up to 100 million times greater than the LHC beams. Whether they are protons or nuclei and how they are accelerated are presently unknown. The particle cascades created when these UHECRs interact in the atmosphere are not well-described by
simulations, but since the primary...
Prof.
Anatoly Petrukhin
(MEPhI)
14/02/2012, 17:30
New technique of EAS investigations by means of the method of local muon density spectra (LMDS) is developed. Application of this method to investigations of inclined EAS allows exploration of CR energy interval from 10^15 to 10^19 eV by means of a relatively small detector with area ~100 m^2 due to very strong dependence of EAS muon density on zenith angle. During 2002-2007, long-term...
Dr
Ralph Engel
(Forschungszentrum Karlsruhe)
14/02/2012, 17:50
Prof.
Peter Tinyakov
(Universite Libre de Bruxelles)
15/02/2012, 09:00
Dr
Grigory Rubtsov
(Institute for Nuclear Research of RAS),
Markus Risse
(University of Siegen)
15/02/2012, 09:40
Thomas Gaisser
(University of Delaware)
15/02/2012, 10:20
Guenter Sigl
(University of Hamburg)
15/02/2012, 11:30
Dr
Roberto Aloisio
(INAF - Osservatorio Arcetri Firenze)
15/02/2012, 12:10
We will discuss the main features of ultra high energy nuclei propagation in the intergalactic space, presenting a novel analytical approach to pursue such studies. We will also discuss a new interpretation of the experimental observations of UHECR.
Sergey Troitsky
(Russian Academy of Sciences (RU))
15/02/2012, 14:00
I discuss possible sites of acceleration of UHECRs by regular electromagnetic fields in astrophysical sources. A plausible mechanism of acceleration works in the vicinity of supermassive black holes in active galactic nuclei. It is motivated by relatively high density of UHECR sources as suggested by both statistics of clustering and the shape of the GZK cutoff. However, I demonstrate that the...
Gwenael Giacinti
(NTNU Trondheim, Norway)
15/02/2012, 14:20
In this work, we investigate the impacts a potential shift towards a heavy composition at the end of the spectrum would have on the future data. We present detailed simulations for the propagation of ultra-high energy heavy nuclei, with E > 60 EeV, within recent Galactic Magnetic Field (GMF) models. We both consider the regular and turbulent components of the GMF. We show that with UHE heavy...
Prof.
Daniele Fargion
(Rome University 1 Sapienza and INFN)
15/02/2012, 14:40
Since last decades UHECR models teach us that at EeV energy UHECR are mostly of extragalactic origin. Moreover earliest (2007) AUGER at 55 EeV energy events were suggesting an UHECR GZK cut off and arrival map correlated with super-galactic plane, SGP,inside the expected GZK volume traced by protons. However the same AUGER composition imprint favoured nuclei (heavy or light) and not...
Alexander Kusenko
(UCLA)
15/02/2012, 15:00
First, I will present new evidence, from gamma-ray observations of blazars, that cosmic rays are, indeed, accelerated in AGNs. Second, I will discuss the plausibility of a substantial contribution of transient galactic sources, such as past GRBs and hypernovae, to the observed flux of cosmic-ray nuclei. The likely contamination of UHECR data by the nuclei from past galactic stellar...
Dr
Andrew Taylor
(ISDC, University of Geneva)
15/02/2012, 15:20
Using the recent Auger energy spectrum and composition
analysis results, an investigation is carried out into the requirements
placed on the UHECR sources. The spatial distribution of these
sources is investigated along with the energy distribution of UHECR
they output. These investigations reveal the need for local UHECR
sources which output a hard spectrum of intermediate/heavy...
Dr
Michelangelo Ambrosio
(INFN Napoli)
15/02/2012, 16:30
The muon longitudinal profile along the shower axis is strictly connected to the primary nature and primary hadronic interaction with air nuclei. The detection of muonic component inside showers generated by Very High Energy Cosmic Rays provides a very powerful tool for sensing high energy interactions between cosmic ray particles and air molecules. Fundamental parameters as the interaction...
Prof.
Olaf Scholten
(KVI/Univ. of Groningen)
15/02/2012, 16:50
The physics of radio emission from cosmic-ray induced air showers is shortly summarized. It will be shown that the radio signal at different distances from the shower axis provides complementary information of the longitudinal shower evolution, in particular the early part, and the distribution of the electrons in the shower core. This complements the information obtained from surface,...
Ad van den Berg
(University of Groningen)
15/02/2012, 17:10
The Auger Engineering Radio Array (AERA) is one of the low energy enhancements of the Pierre Auger Observatory. AERA is based on experiences obtained with the LOPES and CODALEMA experiments in Europe and aims to study in detail the emission mechanism of radio signals in the MHz region from extensive air showers. The data from AERA will be used to assess the sensitivity of MHz radiation to the...
Mr
Christopher Williams
(University of Chicago & KICP)
15/02/2012, 17:30
We present measurements of microwave emission from an electron-beam induced air plasma performed at the 3 MeV electron Van de Graaff facility of the Argonne National Laboratory. Results include the emission spectrum between 1 and 15 GHz, the polarization of the microwave radiation and the scaling of the emitted power with respect to beam intensity. MAYBE measurements provide further insight on...
Radomir Smida
(Karlsruhe Institute of Technology)
15/02/2012, 18:10
A measurement of extensive air showers in the microwave range has been considered as a possible successor to current measurement techniques. The CROME (Cosmic Ray Observation via Microwave Emission) experiment consisting of several parabolic antennas measures radiation from the atmosphere in coincidence with air showers detected by the KASCADE-Grande experiment. Nanosecond radio pulses are...
Prof.
John Belz
(University of Utah)
15/02/2012, 18:25
Increased event statistics will be required to definitively answer the question of the origin(s) of Ultra-High Energy Cosmic Rays (UHECR). Using current technologies however, achieving the necessary statistics may be financially and practically impossible.
We describe the status and plans of the TARA project, an effort to detect Ultra-High-Energy Cosmic Rays by their forward scattered or...
Etienne Parizot
(Université Paris Diderot / APC)
16/02/2012, 09:00
The last decade has established UHECR physics as a phenomenologically rich and experimentally mature science. Key observations related to the UHECR energy spectrum, composition and distribution over the sky have clarified a few basic open question, and raised new, unexpected ones. The absence of a clear signal of anisotropy or correlation with some classes of astrophysical objects, although in...
Prof.
Toshikazu Ebizusaki
(Riken)
16/02/2012, 09:20
The idea looking down the Earth to observe air-showers from space is not new. In fact, John Linsley already in 1979, has proposed to use a space telescope for the observation of UV emission from air-showers. Since then, a few missions are proposed to achieve this next generation technology for the exploration of the high energy universe. Space-based ultra-high energy observatories have...
Prof.
Andrea Santangelo
(University Tuebingen)
16/02/2012, 10:00
JEM-EUSO, the Extreme Universe Space Observatory on board the Japanese Experiment Module of the ISS (International Space Station), is expected, within this decade, to explore the ultra-high energy (UHE) Universe with unprecedentedly large effective area and uniform exposure.
In this talk we first summarize the scientific context of the mission, including its scientific requirements, and we...
Dr
Mario Bertaina
(University Torino)
16/02/2012, 10:20
Designed as the first mission exploring the Ultra High Energy Universe from space, JEM-EUSO will monitor the Earth's atmosphere to record UV (300-400 nm) tracks generated by Extensive Air Showers produced by UHECR primaries. In this contribution, the expected performances of JEM-EUSO will be reviewed. In particular, by detailed simulation studies performed with realistic trigger and...
Lawrence Wiencke
(Colorado School of Mines)
16/02/2012, 10:40
Large aperture detector systems to measure high energy cosmic rays, also offer unique opportunities in other areas of science. Disciplines include geophysics such as seismic and volcanic activity, and atmospheric science ranging from clouds to lightening to aerosols to optical transients. This talk will discuss potential opportunities based on the ongoing experience of the Pierre Auger Observatory.
Antoine Letessier-Selvon
(LPNHE CNRS/In2p3)
16/02/2012, 11:30
We show that a fundamental element for future generations of UHECR observatories is the multicomponent measurements of extensive air shower.
Such measurements may allow an event-by-event identification of the primary cosmic ray type and would radically impact on the study of various aspects of UHECR physics. From detailed hadronic physics studies to sources discovery via Galactic and...
Prof.
Paolo Privitera
(University of Chicago)
16/02/2012, 11:50
In order to understand the composition and hadronic interactions of ultra-high energy cosmic rays above $10^19.5$ eV, currently limited by statistics, the next generation of experiments must provide a precise measurement of the maximum shower development with a large aperture. We propose a novel design of fluorescence detectors arranged in a large ($\ge 40000$ km$^2$) ground array. The shower...
Shoichi Ogio
(Osaka City University)
16/02/2012, 12:10
The Telescope Array (TA) experiment is the world’s first and the only air shower detector to be directly calibrated by an on-site accelerator beam. For wider and deeper understanding of cosmic rays via high precision measurements, we have several future plans for the TA experiment. One extension plan is called TA low energy extension (TALE), to extend the sensitive energy range to 10^16.5 eV...
Angela Olinto
(The University of Chicago)
16/02/2012, 14:00
Prof.
Masaki Fukushima
(University Tokyo)
16/02/2012, 14:40
Alan Watson
(University of Birmingham (GB))
16/02/2012, 15:20
Dr
Gonzalo Rodriguez
(For the Pierre Auger Collaboration)
poster
The average muon content of measured showers with zenith angles between 60 and 80 degrees detected at the Pierre Auger Observatory is
obtained as a function of shower energy using a reconstruction method
specifically designed for inclined showers and the hybrid character of the detector. The reconstruction of inclined showers relies on a comparison between the measured signals at ground and...
Anatoly Ivanov
(Shafer Institute for Cosmophysical Research & Aeronomy)
poster
One of the main goals of investigations using present and future giant extensive air shower (EAS) arrays is the mass composition of ultra-high energy cosmic rays (UHECRs). A new approach to the problem is presented, combining analysis of arrival directions with the statistical test of paired EAS samples. An idea of the method is to search for possible correlations of UHECR masses with their...
Dr
Shibata Tatsunobu
(ICRR, Universty of Tokyo)
poster
The Electron Light Source (ELS) is a new light source for the absolute energy calibration of cosmic ray Fluorescence Detector (FD) telescopes. The ELS is a compact electron linear accelerator with a typical output of 10^9 electrons per pulse at 40MeV. We fire the electron beam vertically into the air 100 m in front of the telescope. The electron beam excites the gases of the atmosphere in the...
Gustavo Medina Tanco
(Instituto de Ciencias Nucleares - UNAM)
poster
JEM-EUSO will be the first space observatory to explore the UHECR sky. It will use the fluorescence technique to achieve a 3D-reconstruction of extensive air shower tracks, achieving unprecedentedly large effective aperture and a very uniform exposure in declination. These characteristics will allow precision measurements of the energy spectrum at the highest energies, including the region of...
Takayuki Tomida
(University of Yamanashi / Honda-lab.)
poster
Atmospheric monitoring is very important for the observation of air showers by the air
fluorescence technique.
In the Telescope Array (TA) experiment, the LIDAR (LIght Detection And Ranging) system and the CLF (Central Laser Facility) system are used for the measurement of atmospheric transparency. The LIDAR system is located southeast of TA site, and the CLF is located in the center of...
Andreas Haungs
(Forschungszentrum Karlsruhe)
poster
Andreas Haungs and the AugerNext consortium for the Pierre Auger Collaboration
The findings so far of the Pierre Auger Observatory and the Telescope Array define the requirements for a possible next generation experiment: it needs to be considerably increased in size, it needs a better sensitivity to composition, and it should cover the full sky. AugerNext aims to perform innovative...
Naoto Sakaki
(Aoyama Gakuin University)
poster
In order to unveil the mystery of ultra high energy cosmic rays (UHECR's), JEM-EUSO (Extreme Universe Space Observatory on board of the Japan Experiment Module), launched ~2017, will observe extensive air showers induced by UHECR's from the International Space Station orbit with a huge acceptance. An accurate calibration of the JEM-EUSO instrument, which consists of Fresnel optics and a...
Dr
Stanislav Knurenko
(Shafer Institute for Cosmophysical Research)
poster
We present estimation of proton-air inelastic interaction cross-section obtained for different energy values are. Results are compared with different hadron interaction models.
Dr
Stanislav Knurenko
(Shafer Institute for cosmophysical research)
poster
A spectrum of cosmic rays within energy range 1015-3*1017 eV was derived from the data of the small Cherenkov setup, which is a part of the Yakutsk complex EAS array. In this, work a new series of observation is covered. These observations lasted from 2000 till 2010 and resulted in increased number of registered events within interval 1016-1018 eV, which in turn made it possible to reproduce...
Maurice Stephan
(RWTH Aachen University)
poster
Due to their high photon detection efficiency, silicon photomultipliers (SiPMs) promise to increase the sensitivity of today’s fluorescence telescopes which use photomultiplier tubes to detect light originating from extensive air showers. On the other hand drawbacks like a small sensitive area, a strong temperature dependence, a high noise rate and a reduced dynamic range have to be...
Dr
Ralf Matthias Ulrich
(KIT - Karlsruhe Institute of Technology (DE))
poster
The detailed analysis of cosmic ray induced extensive air showers requires a good knowledge of hadronic particle production in the shower cascade. For ultra-high energy cosmic rays this depends on the extrapolation of the available accelerator data by the models over wide ranges in energy but also into the forward phase space. We demonstrate how the extrapolation of different particle...
Prof.
Ina Sarcevic
(University of Arizona)
poster
We present results for neutrino fluxes from astrophysical sources.
We show that charm production enhances a flux of very high energy neutrinos from astrophysical sources with jets driven by central engines, such as gamma ray bursts or supernovae with jets. The neutrino flux from semi-leptonic decays of charmed mesons is subject to much less hadronic and radiative cooling than the...
Dr
Daisuke Ikeda
(Institute for Cosmic Ray Research, University of Tokyo)
poster
The Telescope Array (TA) experiment is the largest Ultra-High Energy Cosmic Ray (UHECR) observatory in the northern hemisphere, and is located in the west desert of Utah. It is a hybrid UHECR experiment using two types of detectors: three stations of Fluorescence Detectors (FDs) and 507 Surface Detectors (SDs). The three FD stations (at Middle Drum (MD), Long Ridge (LR), and Black Rock (BR))...
Dr
Diego Garcia Gammez
(LAL/University Paris-Sud)
poster
The surface detector array of the Pierre Auger Observatory allows for an experimental estimation of the muonic longitudinal development of extensive air showers in an indirect way. From the FADC traces of the surface detectors far from the core it is possible to reconstruct the Muon Production Depth distribution (MPD). We characterize the goodness of this reconstruction for zenith angles...
Dr
Matias Tueros
(Universidad de Santiago de Compostela)
poster
The determination of the primary energy of extensive air showers using the fluorescence technique requires an estimation of the energy carried away by particles (muons, neutrinos) that do not deposit all their energy in the atmosphere. This estimation is typically made using Monte Carlo simulations and is thus dependent on the hadronic interaction model, specially on the predictions for...
Susumu Inoue
(Institute for Cosmic Ray Research, University of Tokyo)
poster
Population III stars, the very first, metal-free stars to form in the Universe, may give rise to gamma-ray bursts (GRBs) with much greater energy compared to ordinary GRBs. Such Pop III GRBs can produce ultra-high energy cosmic rays (UHECRs) with a correspondingly larger energy budget. Despite their typically high redshifts (z~10-20) and modest expected burst rates, the consequent cosmogenic...
Dr
Jaroslaw Stasielak
(Institute of Nuclear Physics PAN, Krakow, Poland)
poster
We investigate the possibility of detecting extensive air showers by the radar technique. Considering a bistatic radar system and different shower geometries, we simulate reflection of radio waves off the static plasma produced by the shower in the air. Using the Thompson cross-section for radio wave reflection, we obtain the time evolution of the signal received by the antennas. The frequency...
Larissa Paul
(RWTH Aachen University)
poster
The Radio Air Shower Test Array (RASTA) project explores the opportunity to enhance the IceCube Neutrino Observatory by measuring cosmic ray air-showers using radio detection. Radio signals in the 10-250 MHz region are produced by the deflection of the charged constituents of cascades in the Earth's magnetic field, providing a calorimetric measurement of the electron/positron component of...
Shoichi Ogio
(Osaka City University)
poster
Microwave radiation from extensive air showers is expected to provide a new technique to observe UHECR. We developed a set of radio telescopes each of which consists of a 0.45 m parabola antenna in Ku band, a power detector and a waveform digitizer. Firstly, we had coincidentally operated the radio telescopes with an air shower array consists of nine plastic scintillators with about 10 m...
Sergio Navas Concha
(Universidad de Granada (ES))
poster
The Pierre Auger Observatory has the capability of detecting ultra-high
energy neutrinos of all flavours. They interact through charged and
neutral currents in the atmosphere (downward-going) and through the
``Earth-skimming'' mechanism (upward-going). The main challenge in
detecting ultra-high energy neutrinos with the Pierre Auger Observatory
is to identify a neutrino-induced...
Dr
Grigory Rubtsov
(Institute for Nuclear Research of RAS)
poster
We search for ultra-high energy photons by analyzing geometrical properties of shower fronts of events registered by the Telescope Array surface detector. By making use of an event-by-event statistical method, we derive upper limits on the absolute flux of primary photons with energies above 10^19, 10^19.5 and above 10^20 eV based on the three years data from Telescope Array surface detector...
Dr
Viviana Scherini
(University of Milano and INFN Milano (Italy))
poster
The Pierre Auger Observatory has a significant sensitivity to search for ultra-high energy photons using data from the ground detector alone or in hybrid mode. Recent upper limits on the photon flux are already below the percent-level with regard to the total flux. The current status and details of the analysis methods are presented.
Dr
Peter Schiffer
(University of Hamburg)
poster
A future Ultra-High Energy Cosmic Ray (UHECR) Observatory will provide an unprecedented amount of high quality UHECR data. The astrophysical interpretation of this data requires a detailed Monte Carlo simulation of UHECR propagation. The publicly available code CRPropa allows such a simulation, taking into account all relevant energy losses in ambient photon fields and deflections in...
Prof.
Peter Tinyakov
(Universite Libre de Bruxelles)
poster
We search for anisotropy of ultra-high energy cosmic ray (UHECR) events
collected by the Telescope Array detector in the first 3.5 years of operation.
Following earlier studies, we consider the event sets with energy thresholds
of E>10 EeV, E>40 EeV, and E>57 EeV. First, we calculate the autocorrelation
function of the cosmic ray events and find no significant deviations from...
Maria Dolores Rodriguez Frias
(University Alcala, Madrid)
poster
An Atmospheric Monitoring System (AMS) is mandatory and a key element of a space-based mission which aims to detect Ultra-High Energy Cosmic Rays. JEM-EUSO has a dedicated atmospheric monitoring system that plays a fundamental role in our understanding of the atmospheric conditions in the field of view of the telescope. Our AMS consists of an infrared camera and a LIDAR device that are being...
Dr
Stanislav Knurenko
(Shafer Institute for cosmophysical research)
poster
Calculations of signals in surface and underground scintillation detectors of the Yakutsk array from particles of extensive air showers in terms of QGSJET-II and GEISHA 2002 models with the help of the CORSIKA 6.616 and GEANT4 codes with parameter ε=10-8 of the thinning procedures have been carried out to estimate muon fraction at 600 m from the shower axis at energies 3∙1017 -3∙1019 eV....
Kentaro Kawade
(Nagoya University (JP))
poster
The Large Hadron Collider forward (LHCf) experiment has successfully finished the first phase of data taking at LHC $\sqrt{s}=0.9TeV and 7TeV$ proton-proton collisions in 2010.
In this poster, the status and future plan of the LHCf experiment is presented.
Prof.
Peter von Ballmoos
(IRAP Toulouse)
poster
EUSO-BALLOON is a pathfinder mission for the Extreme Universe Space Observatory on-board the Japanese Experiment Module (JEM-EUSO) mission. Through a series of stratospheric balloon flights performed by the French Space Agency CNES, EUSO-BALLOON will serve as an evolutive test-bench for all the key technologies of JEM-EUSO, as well as other future missions dedicated to the observation of...
Gordon Thomson
(University of Utah)
poster
The Telescope Array Low Energy Extension (TALE) will consist of an array of scintillation counters and fluorescence telescopes designed to lower the minimum energy of the Telescope Array (TA) experiment by about an order of magnitude. The fluorescence detector will have 10 telescopes which cover elevation angles between 31 and 59 degrees, and 95 degrees in azimuth. There will be 45...
Dr
Benjamin Stokes
(University of Utah)
poster
Historically, studies of surface detector response have been severely limited by the inability to simulate charge density fluctuations at the distance scale of individual detector units. We present a two-prong solution. First, we have developed a technique that allows us to run the unmodified CORSIKA in parallel mode. This has allowed us to simulate $\sim100$ non-thinned CORSIKA showers in the...
