Vladimir Novotny
(Charles University in Prague)
7/30/15, 3:30 PM
CR-TH
Poster contribution
We introduce a simple branching model for the development of hadronic showers in the Earth's atmosphere.
Based on this model, we show how the size of the pionic component followed by muons can be estimated.
Several aspects of the subsequent muonic component are also discussed.
We focus on the energy evolution of the muon production depth.
We also estimate the impact of the primary...
Dr
Renat Sibatov
(Ulyanovsk State University, Ulyanovsk, Russia)
7/30/15, 3:30 PM
CR-TH
Poster contribution
Cosmic Ray anisotropy is a key element in the quest to find the origin of the enigmatic particles. A well known problem is that although most of the likely sources are in the Inner Galaxy, the direction from which the lowest energy particles (less than about 1 PeV) come is largely from the Outer Galaxy. We show that this can be understood taking into account a possible reflection of charged...
Brian Wundheiler
(Instituto de Tecnologias en Deteccion y Astroparticulas)
7/30/15, 3:30 PM
CR-EX
Poster contribution
Although the nature of ultra high energy cosmic rays is still largely unknown, significant progress has been achieved in last decades with the construction of the large arrays that are currently taking data. One of the most important pieces of information comes from the chemical composition of primary particles. It is well known that the muon content of air showers generated by the interaction...
Ralph Richard Engel
(KIT - Karlsruhe Institute of Technology (DE))
7/30/15, 3:30 PM
CR-TH
Poster contribution
The event generator Sibyll can be used for the simulation of hadronic
multiparticle production up to the highest cosmic ray energies. It is
optimized for providing an economic description of those aspects of
the expected hadronic final states that are needed for the calculation
of air showers and atmospheric lepton fluxes. New measurements from
fixed target and collider experiments, in...
Mr
Thomas Pöschl
(Technische Universität München)
7/30/15, 3:30 PM
CR-IN
Poster contribution
Measuring cosmic antimatter fluxes probes many astrophysical processes. The abundancies and energy spectra of antiparticles support the understanding of the creation and propagation mechanisms of cosmic rays in the Universe. Deviations from theoretical predictions may hint to exotic sources of antimatter or inaccuracies in our understanding of the involved processes. Specifically,...
Dr
Hans Peter Dembinski
(Bartol Institute, Dept of Physics and Astronomy, University of Delaware)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The IceCube MasterClass is an outreach project of the IceCube experiment at South Pole for 9th to 12th grade school students. The MasterClass is designed to provide an authentic astrophysics research experience by demonstrating typical elements of IceCube research. It is a full-day experience of engaging activites, eductional talks, and scripted analyses, where students can reproduce the main...
Dr
Toshiyuki Nonaka
(Institute for Cosmic Ray Research, University of Tokyo)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The Telescope Array (TA) experiment is located in the western desert of Utah, USA and observes ultra high energy cosmic rays in the northern hemisphere. In the highest part of the energy region, the cosmic ray energy spectrum shape carries information of the source density distribution. We search for directional differences in the energy spectrum shape. In this study, observed cosmic ray...
Simon Bacholle
(APC- Paris Diderot university)
7/30/15, 3:30 PM
CR-TH
Poster contribution
Using an integrated propagation code that takes into account particle energy losses, nuclear photo-dissociation and deflections by Galactic and extragalactic magnetic fields, we simulate representative sky maps of ultra-high-energy cosmic rays over the entire sky, for a wide range of astrophysical scenarios, with different source density, spectrum and composition. We analyze these sky maps...
carlos medina-hernandez
(colorado school of mines)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The Fluorescence Detector (FD) at the Pierre Auger Observatory measures the intensity of the scattered light from laser tracks generated by the Central Laser Facility (CLF) and the eXtreme Laser Facility (XLF) to monitor and estimate the aerosol optical depth (tau(z,t)). These measurements are important to have unbiased and reliable FD reconstruction of the energy of the primary cosmic ray,...
Andreas Haungs
(Karlsruhe Institute of Technology)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The findings so far of the Pierre Auger Observatory and those of the Telescope Array define some requirements for a possible next generation global cosmic ray observatory: it needs to be considerably increased in size, it needs good sensitivity to composition, and it has to cover the full sky. At the Pierre Auger Observatory, AugerNext aims to conduct some innovative initial research studies...
Gaetano Salina
(Istituto Nazionale di Fisica Nucleare)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The quality of the physics results, derived from the analysis of the data collected at the Pierre Auger Observatory depends heavily on the calibration and monitoring of the components of the detectors. It is crucial to maintain a database containing complete information on the absolute calibration of all photomultipliers and their time evolution. The low rate of the physics events implies that...
Mr
Jorge Cotzomi
(FCFM BUAP)
7/30/15, 3:30 PM
CR-EX
Poster contribution
For the study of Extensive Atmospheric Showers (EAS) is essential the reconstruction method of Cherenkov radiation produced by charged secondary particles. In the recent studies it was shown that to greater accuracy of the reconstruction parameters of the EAS appears as a dependence of the spatial distribution of Cherenkov radiation as function of the azimuth angle, this due to the influence...
Paolo Brogi
(Universita degli studi di Siena (IT))
7/30/15, 3:30 PM
CR-IN
Poster contribution
CALET is a space mission currently in the final phase of preparation for a launch to the International Space Station (ISS), where it will be installed on the Exposed Facility of the Japanese Experiment Module (JEM-EF). In addition to high precision measurements of the electron spectrum, CALET will also perform long exposure observations of cosmic nuclei from proton to iron and will detect...
Gabriele Bigongiari
(Universita degli studi di Siena (IT))
7/30/15, 3:30 PM
CR-IN
Poster contribution
CALET is a space mission currently in the final phase of preparation for a launch to the International Space Station (ISS), where it will be installed on the Exposure Facility of the Japanese Experiment Module (JEM-EF). One of the main science goals of the experiment is the measurement of the inclusive electron (+positron) spectrum.
By integrating a sufficient exposure on the ISS, CALET will...
Dr
Alberto Carramiñana Alonso
(INAOE)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The Latin American Giant Observatory (LAGO) is an international network of water-Cherenkov detectors (WCD) set in different sites across Latin America. In México, on the top of the Sierra Negra volcano at 4530 m a.s.l., LAGO has completed its first instrumented detector of an array, consisting of a cylindrical WCD with 7.3 m in diameter and 1 m of height, with a total detection area of $40$...
Mr
Motoki Hayashi
(Shinshu University)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The main calibration items of Fluorescence Detector (FD) observation are the fluorescence yield, the atmospheric attenuation and the detector sensitivity.
In 2012-2013, we conducted a joint TA-Auger calibration campaign by a flying device mounted with an ultraviolet LED as a standard light source. This device is called an octocopter, and was built by KIT. An octocopter has excellent...
Roman Hiller
(KIT)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The Tunka Radio Extension (Tunka-Rex) is an array of 44 radio antenna stations, constituting a radio detector for air showers.
It is an extension to Tunka-133, an air-Cherenkov detector in Siberia, which is used as an external trigger for Tunka-Rex and
provides a reliable reconstruction of energy and shower maximum.
Each antenna station consists of two perpendicularly aligned active...
Jörg Hörandel
(Ru Nijmegen/Nikhef)
7/30/15, 3:30 PM
CR-IN
Poster contribution
Extensive air showers create short nanosecond-scale pulses in the radio frequencies. These pulses have been measured successfully in the past years at the Low-Frequency Array (LOFAR).
Due to the short duration and emission of the signal in the atmosphere, methods based on flux calibration of known sources as used in radio astronomical observations cannot be applied to establish an absolute...
Bokkyun Shin
(Hanyang University)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The Electron Light Source (ELS) is a linear accelerator used to perform energy calibration of the fluorescence detectors (FD) in the Telescope Array experiment. The ELS shoots a beam of 40 MeV electrons into the atmosphere 100 m in front of the Black Rock Mesa FD. Air fluorescence light is detected from nitrogen molecule excitation by the ELS electron beam. An end-to-end calibration from...
Prof.
Rostislav Kokoulin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
7/30/15, 3:30 PM
CR-EX
Poster contribution
Measurements of the energy spectra of cascade showers generated due to interactions of penetrating cosmic ray particles in massive water/ice detectors is one of the main methods of the study of the energy characteristics of the fluxes of muons and neutrinos. In the present paper, results of investigations of cascades initiated by inclined muons in the Cherenkov water detector NEVOD with a...
Mr
Hari Haran Balakrishnan
(HECR Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India and GRAPES-3 Experiment, Cosmic Ray Laboratory, Ooty 643 001, India)
7/30/15, 3:30 PM
CR-TH
Poster contribution
For the analysis of the GRAPES-3 Muon data, large scale Monte Carlo simulations are required. These simulations are performed using the CORSIKA simulation package developed by the KIT group. However, the geomagnetic cutoff rigidity varies with direction, therefore, a constant threshold for selection of primary energy results in generation of a large number of events that are subsequently...
Mr
Jon Paul Lundquist
(Telescope Array Project)
7/30/15, 3:30 PM
CR-EX
Poster contribution
A simple cosmic ray track finding pattern recognition analysis (PRA) method for fluorescence detectors (FD) has been developed which significantly improves Xmax resolution and its dependence on energy. Events which have a clear rise and fall in the FD view contain information on Xmax that can be reliably reconstructed. Shower maximum must be extrapolated for events with Xmax outside the field...
Catia Grimani
(University of Urbino "Carlo Bo")
7/30/15, 3:30 PM
CR-TH
Poster contribution
Positrons were discovered in cosmic rays 50 years ago.
During the last 25 years, reliable magnetic
spectrometer observations consistently revealed an excess of these particles above a few GeV with respect to the expected secondary component. The most recent measurements of the positron flux and the e+/(e++e-) ratio carried out by the Pamela and AMS experiments confirm the average trend of...
Dennis Cazar Ramírez
(Universidad San Francisco de Quito)
7/30/15, 3:30 PM
CR-IN
Poster contribution
Nowadays, one of the most challenging scenarios scientists and scientific communities are facing is the huge amount of data emerging from vast networks of sensors and from computational simulations performed in a diversity of computing architectures and e-infrastructures. In this work we present the strategy of the Latin American Giant Observatory (LAGO) to catalog and preserve a vast amount...
Stephany Vargas
(Escuela Politécnica Nacional)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The Latin American Giant Observatory (LAGO) Project is an extended Cosmic Ray Observatory mainly oriented to perform basic research in three branches: high energy phenomena, space weather and atmospheric radiation at ground level. To observe the high energy component (over 10 GeV) of Gamma Ray Bursts (GRBs), the LAGO Collaboration is installing Water Cherenkov Detectors (WCDs) in high altitude...
Karl-Heinz Kampert
(Universität Wuppertal)
7/30/15, 3:30 PM
CR-IN
Poster contribution
Fluorescence telescopes are an important technique to measure extensive air showers initiated by ultra-high energetic cosmic rays. They detect the longitudinal profile of the energy deposited in the atmosphere by
the de-excitation of nitrogen molecules in the UV-range. In the past years the development of photomultiplier tubes (PMT) has led to an increase of more than $30\%$ in photon...
Shoichi Ogio
(Osaka City University)
7/30/15, 3:30 PM
CR-IN
Poster contribution
TALE, the Telescope Array Low Energy extension is designed to lower the energy threshold to about $10^{16.5}$ eV. The TALE surface detector will include an infill array of 76 scintillation counters (40 with 400 m spacing and 36 with 600 m spacing) and an addition to the TA SD of 27 counters. We have already deployed 35 counters with 400 m spacing in April 2013. For the additional 68 counters,...
Yoichi Asaoka
(Waseda University (JP))
7/30/15, 3:30 PM
CR-IN
Poster contribution
The CALET project aims at a long duration observation of high energy cosmic rays onboard the International Space Station (ISS). The CALET detector features a very thick calorimeter of 30 radiation-lengths which consists of imaging and total absorption calorimeters. It will directly measure the cosmic-ray electron spectrum in the energy range of 1GeV--20TeV with 2-% energy resolution.
...
Olivier Deligny
(CNRS/IN2P3)
7/30/15, 3:30 PM
CR-TH
Poster contribution
The transport of Galactic cosmic rays in both turbulent and regular magnetic fields can be described in terms of diffusion and drift motions. These produce gradients of cosmic-ray densities. The anisotropy resulting from these gradients for an observer located anywhere in the Galaxy is commonly described in terms of a pure dipole moment, the amplitude of which is proportional to the gradient...
Dr
Charles Timmermans
(Nikhef/Radboud University)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The scale and scope of the physics studied at the Pierre Auger Observatory continue to offer significant opportunities for original outreach work. Education, outreach and public relations of the Auger Collaboration are coordinated in a dedicated task whose goals are to encourage and support a wide range of efforts that link schools and the public with the Auger scientists and the science of...
Paolo Desiati
(University of Wisconsin - Madison)
7/30/15, 3:30 PM
CR-TH
Poster contribution
Cosmic ray anisotropy has been observed to be present in a wide energy range by a variety of experiments such as Milagro and the IceCube Observatory. However, a satisfactory explanation has been elusive for more than fifteen years now. A possible solution for the TeV-PeV cosmic ray anisotropy is the introduction of turbulent magnetic interactions on the arrival direction. We perform test...
OLEG DALKAROV
(P.N.Lebedev Physical Institute)
7/30/15, 3:30 PM
CR-TH
Poster contribution
107 cascades, created by secondary particles of astroparticle interaction at $10^{16}$ eV, were detected in the stratospheric emulsion chamber. Their azimuth
distribution reveals a distinct anisotropy. Estimation of
the elliptic flow coefficient v2 gives a value 0.35 $\pm$ 0.02.
The distribution of cascade p(t) is also azimuth anisotropic and its maximal value coincides with...
Daisuke Ikeda
(Institute for Cosmic Ray Research, University of Tokyo), Dr
William Hanlon
(University of Utah)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The energy spectrum and mass composition of Ultra-High Energy Cosmic Rays (UHECRs) measured using a hybrid analysis will be presented. TA consists of three FD stations and 507 SDs. A hybrid analysis reconstructs the position and direction of the air shower more accurately than the monocular FD analysis and measures the longitudinal development and calorimetric energy of the shower precisely....
Toshihiro FUJII
(University of Chicago, University of Tokyo)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The Telescope Array (TA) experiment is the largest hybrid detector to observe ultra-high energy cosmic rays (UHECRs) in the northern hemisphere. We report on results of the energy spectrum of UHECRs covering a wide energy range, and the mass composition using the maximum shower depth, from analyzing data collected in monocular mode by the fluorescence detectors of TA during the first seven years.
Mr
Luiz Augusto Stuani Pereira
(Unicamp)
7/30/15, 3:30 PM
CR-EX
Poster contribution
One of the first improvements of the Pierre Auger Observatory is the Auger Muons and Infill for the Ground Array (AMIGA) detector, in order to measure the cosmic ray spectrum and the chemical composition in the energy range from $10^{17}$eV. The muon detectors of the AMIGA *infill* count muons from extensive air showers observed by Auger Observatory, which are then reconstructed by the surface...
Sami Caroff
(Centre National de la Recherche Scientifique (FR))
7/30/15, 3:30 PM
CR-EX
Poster contribution
The Alpha Magnetic Spectrometer AMS-02 is a high energy particle physics detector, operational on the International Space Station since May 2011. The AMS-02 goal is the fundamental physics research in space with high energy cosmic rays, during its 20 year duration mission.
The latest published results, with 30 months of data, show an excess of high energy positrons whose origin is still...
Thomas Bretz
(RWTH Aachen)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The FAMOUS telescope is a prove-of-concept study for the usage of
silicon based photo sensors (SiPMs) in fluorescence telescopes. Such
telescopes detect the fluorescence light emitted by ultra-high energy
cosmic ray particles impinging on the Earth's atmosphere. Available
instruments, like the fluorescence telescopes of the Pierre Auger Observatory in
Argentina, are using photo multiplier...
Tadahisa Tamura
(Kanagawa University (JP))
7/30/15, 3:30 PM
CR-IN
Poster contribution
We will report testing and calibration of the heavy-ion energy and charge resolution of the CALET cosmic-ray instrument that will fly on the International Space Station in 2015. The beam tests were carried out using a test instrument that is functionally equivalent to CALET. CALET will measure the energy spectra and arrival directions of cosmic-ray electrons to 20 TeV and hadrons to 1 PeV with...
Mr
Dennis Soldin
(University of Wuppertal)
7/30/15, 3:30 PM
CR-EX
Poster contribution
Cosmic ray air showers with primary energies above $\sim 1$ TeV can produce muons with high transverse momentum ($p_\mathrm{T} > 2$ GeV). These isolated muons can have large transverse separations from the shower core up to several hundred meters. Together with the muon bundle they form a double track signature in km$^3$-scale neutrino telescopes such as IceCube. These muons originate from the...
Markus Roth
(KIT)
7/30/15, 3:30 PM
CR-EX
Poster contribution
Shower universality has demonstrated to be a sturdy tool to describe particle showers produced by primary cosmic rays. The secondary particles at the observation level can be described by a four component model: the well known electromagnetic and muonic components, the contribution due to the electromagnetic halo of the muons, and the electromagnetic particles originating from pion decays...
Xiaoting Qin
(Universita e INFN, Perugia (IT))
7/30/15, 3:30 PM
CR-IN
Poster contribution
The AMS-02 detector is a large acceptance magnetic spectrometer operating on the International Space Station since May 2011. More than 60 billion events have been collected by the instrument as of today. One of the key subdetectors of AMS-02 is the silicon microstrip Tracker, designed to precisely measure the trajectory and absolute charge of cosmic rays in the GeV-TeV energy range. In...
Colin Baus
(KIT - Karlsruhe Institute of Technology (DE))
7/30/15, 3:30 PM
CR-EX
Poster contribution
The inelastic cross section has been measured in proton-proton and proton-lead collisions at centre-of-mass energies per nucleon up to 8 TeV at the LHC. Nuclear scaling effects play an important role in the simulation of cosmic ray interactions and are studied in collisions with lead nuclei. Furthermore, the probability of diffractive interactions influences the efficiency of the energy...
Ryuji Takeishi
(Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba, Japan)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The Pierre Auger Observatory (Auger) in Mendoza, Argentina and the Telescope Array (TA) in Utah, USA aim at unraveling the origin and nature of Ultra-High Energy Cosmic Rays (UHECR). At present, there appear to be subtle differences between Auger and TA results and interpretations. Joint working groups have been established and have already reported preliminary findings. From an experimental...
Yernar Tautayev
(Institute of Physics and Technology, Almaty, Kazakhstan)
7/30/15, 3:30 PM
CR-EX
Poster contribution
Cosmic ray measurements are carried out on at a detector station located in the Tian Shan mountains at an altitude of 3340 meters above sea level using the complex installations "Hadron-9" and "Hadron-44". The main objective of these studies is the interaction of cosmic rays with nuclei, in particular the study of anomalous events occurring in the cores of extensive air showers (EAS). Analysis...
Prof.
Igor Yashin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
7/30/15, 3:30 PM
CR-EX
Poster contribution
An excess of multi-muon events in comparison with simulations performed in frame of widely used hadron interaction models was found in several cosmic ray experiments at very- and ultra-high energies of primary particles. In order to solve this so-called ‘muon puzzle’, investigations of the energy characteristics of EAS muon component are required. A possible approach to such investigations is...
Dr
Semen Khokhlov
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
7/30/15, 3:30 PM
CR-EX
Poster contribution
Results of investigation of the near-horizontal muons are presented in the range of zenith angles of 85 – 95 degrees. In this range, so-called ‘albedo’ muons (atmospheric muons scattered in the soil into the upper hemisphere) are detected.
Measurements have been conducted with the NEVOD-DECOR experimental complex located on the campus of MEPhI. The basis of the complex is the Cherenkov water...
Rahul Kumar
(Ben Gurion University)
7/30/15, 3:30 PM
CR-TH
Poster contribution
The expected anisotropy in the 1 to 104 TeV energy range is calculated for Galactic cosmic rays with both anisotropy
in the diffusion tensor and source discreteness taken into account.We find that if the sources are distributed radially
(but with azimuthal symmetry) in proportion to Galactic pulsars, the expected anisotropy almost always exceeds
the observational limits by one order of...
Sun Zhandong
(Southwest Jiaotong University)
7/30/15, 3:30 PM
CR-IN
Poster contribution
To fulfill the requirements of testing the photomultiplier tubes (PMTs) of the electromagnetic detector at the Large
High Altitude Air Shower Observatory, a multifunctional PMT test bench with a two-dimensional (2D) scanning
system is developed. With this 2D scanning system, 16 PMTs are scanned simultaneously to test their uniformity
and cathode transit time difference. The di-distance...
Dr
Chong Wang
(Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences)
7/30/15, 3:30 PM
CR-IN
Poster contribution
Wide Field-of-view air Cherenkov Telescope Array (WFCTA) is an essential component of the Large High Altitude Air Shower Observatory (LHAASO). WFCTA comprises 24 movable identical telescopes specialized for measuring the energy spectrums of the cosmic ray ingredients. In this paper, we describe the synthesis optimization design of the optical system, including the mirror segments, the camera...
Karl-Heinz Kampert
(Universität Wuppertal)
7/30/15, 3:30 PM
CR-IN
Poster contribution
As part of the Auger Engineering Radio Array, an extension of the Pierre Auger Observatory with antennas in the MHz range, it is necessary to monitor the local atmospheric conditions. These have a large influence on the radio emission induced by air showers. In particular, amplified signals up to an order of magnitude have been detected as an effect of thunderstorms. For a more detailed...
Mr
Mikhail Amelchakov
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
7/30/15, 3:30 PM
CR-EX
Poster contribution
The system of calibration telescopes (SCT) of the Cherenkov water detector (CWD) NEVOD is used as a shower array. SCT consists of two planes (80 m^2) with 40 scintillation counters (40×20×2 cm^3) in each. One plane is located on the roof of the CWD, and another one on its bottom. The distance between two planes is 9.45 m. Each registration channel of SCT is able to evaluate the counter...
Francisco Diogo
(LIP (Lisboa))
7/30/15, 3:30 PM
CR-EX
Poster contribution
In addition to the standard $X_\mathrm{max}$ and energy, the longitudinal profiles of extensive air showers contain some more interesting information. For energies above $10^{17.8}$ eV, we present the average profiles as a function of depth measured for the first time at the Pierre Auger Observatory. The profile shapes for different energy ranges are all well reproduced by a Gaisser-Hillas...
Wolfgang Menn
(University of Siegen)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The cosmic-ray hydrogen and helium (1H,2H,3He,4He) isotopic composition between 100 MeV/n and 1.4 GeV/n has been measured with the satellite-borne experiment PAMELA. The rare isotopes 2H and 3He in cosmic rays are believed to originate mainly from the interaction of high energy protons and helium with the galactic interstellar medium. The energy spectrum of these components carries...
Mr
Pedro Assis
(LIP)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The Pierre Auger Observatory operates a hybrid detector composed of a Fluorescence Detector and a Surface Detector array. Water-Cherenkov detectors are the building blocks of the array and as such play a key role in the detection of secondary particles at the ground. A good knowledge of the detector response is paramount to lower systematic uncertainties and thus to increase the capability of...
Dr
Tescaro Diego
(Instituto de Astrofísica de Canarias, Tenerife, Spain)
7/30/15, 3:30 PM
CR-EX
Poster contribution
One of the key characteristic of Alpha Magnetic Spectrometer (AMS-02) is its capability to measure the relative abundances and absolute fluxes of the nuclear components of the galactic cosmic rays (CRs), from hydrogen up to iron (Z=26), in a kinetic energy range from GeV/n to TeV/n. In this contribution we discuss the methodology for the precise identification ions with AMS-02, which is...
Andreas Obermeier
(Rheinisch-Westfaelische Tech. Hoch. (DE))
7/30/15, 3:30 PM
CR-EX
Poster contribution
Since May 2011 the AMS-02 experiment is installed on the ISS and is observing cosmic radiation. It consists of several state-of-the-art sub-detectors, which redundantly measure charge and energy of traversing particles. Due to the long exposure time of AMS-02 of many years the measurement of cosmic-ray energy spectra is mainly limited not by statistics, but by detector response. The...
Hershal Pandya
(University of Delaware)
7/30/15, 3:30 PM
CR-EX
Poster contribution
IceTop, the surface component of the IceCube Neutrino Observatory, detects air showers initiated by cosmic ray nuclei and gamma rays. The ground level muons are correlated with the energy and mass of the primary particle. This correlation is enhanced by resolving those muons which are produced early in the shower. The muon production depth (MPD) is reconstructed as a function of muon arrival...
Lev Pustilnik
(Israel Cosmic Ray Center, and Tel Aviv University)
7/30/15, 3:30 PM
CR-EX
Poster contribution
Temperature effect of mountain muon detectors which exceeds a little that expected theoretically, was studied in this work. Meteorological effects of such detectors have their own peculiarities and practically were not investigated before. Data from multidirectional detectors YangBaJing, Moussala, Bure, Mt. Hermon, Yerevan (2000 м) were used for calculations from the created in IZMIRAN...
Blahoslav Pastirčák
(Institute of Experimental Physics SAS, Košice, Slovakia)
7/30/15, 3:30 PM
CR-TH
Poster contribution
The SecondaryCR model evaluates particle fluxes and spectra of secondary
e-, e+, mu+, mu-, gammas, protons, neutrons, Cherenkov light etc. at
different positions, altitudes and times in the Earth atmosphere.
We developed this model of secondary cosmic rays production in the Earth's
atmosphere in the previous studies. It is based on existing models evaluating
particles transport in...
Konstantin Herbst
(Christian-Albrechts-Universität zu Kiel)
7/30/15, 3:30 PM
CR-TH
Poster contribution
Cosmogenic radionuclides such as 10Be, 14C and 36Cl are a product of the interaction of high energetic primary cosmic ray particles, in particular galactic cosmic rays (GCR), with the Earth’s atmosphere. Because GCRs are modulated on their way through the interplanetary medium the GCR-induced production of these radionuclides is anti-correlated to the solar cycle. In addition, during phases of...
Raul Sarmento
(LIP)
7/30/15, 3:30 PM
CR-IN
Poster contribution
We discuss the concept of an array with Resistive Plate Chambers (RPC) for muon detection in ultra-high energy cosmic ray (UHECR) experiments. RPC have been used in particle physics experiments due to their fast timing properties and spatial resolution. The operation of a ground array detector poses challenging demands, as the RPC must operate remotely under extreme environment, with limited...
Dr
Nikolay Volodichev
(D.V.Skobeltsyn Institute of Nuclear Physics, M.V.Lomonosov Moscow State University)
7/30/15, 3:30 PM
CR-TH
Poster contribution
The results presented in the report are based on the measurements of thermal neutrons flux produced by the Earth’s surface during the experiment carried out in Pamir region at the altitude of 4200 m above sea level for the period from August 1 till August 14, 1994.
The neutrons in the Earth’s atmosphere are produced mainly during the interactions between the primary cosmic rays nucleons and...
James Beatty
(Ohio State University)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The surface detector array of the Pierre Auger Observatory consists of 1660 water Cherenkov
detectors that sample the charged particles and photons of air showers initiated by energetic
cosmic rays at the ground. Each detector records data locally with timing obtained from GPS
units and power from solar panels and batteries. In the framework of the planned upgrade of
the Auger Observatory,...
yury Balabin
(PGI)
7/30/15, 3:30 PM
CR-TH
Poster contribution
In this paper the RUSCOSMICS software package based on the GEANT4 toolkit and its possibilities in the cosmic rays are considered. Energy spectra of secondary cosmic rays particles resulting from the proton transport modeling trough the Earth atmosphere are presented. A calculations error is estimated and a comparison with experimental data is carried out. Also on the basis of the secondary...
Marco Ricci
(Istituto Nazionale Fisica Nucleare Frascati (IT))
7/30/15, 3:30 PM
CR-EX
Poster contribution
Mrs
Stefania Vitillo
(Universite de Genève)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The Alpha Magnetic Spectrometer (AMS-02) is an astroparticle physics detector installed on the International Space Station (ISS) on May 16th 2011 during the STS-134 NASA Endeavour Shuttle mission. The purpose of the experiment is to study with unprecedented precision and statistics charged particles and nuclei in an energy range from 0.5 GeV to few TeV. The AMS-02 Tracker System accurately...
Sander ter Veen
(ASTRON)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The lunar askaryan technique is one of the few ways to obtain a large enough collecting area to detect ultra high energy cosmic rays and neutrinos at the highest end of the spectrum, above 10$^{21}$ eV. The flux of these particles is unknown, but if they are found they either point back to the best cosmic accelerators or may be the products of the decay of exotic particles and a step towards...
Prof.
Maria Giller
(University of Lodz)
7/30/15, 3:30 PM
CR-TH
Poster contribution
We calculate analytically the correlation coefficient of the scattering angle and the lateral deflection for electrons being multiply scattered by small angles while losing energy.
We show that when average losses are assumed for the bremsstrahlung process the behaviour of the correlation coefficient with electron energy is completely different from that
when only the...
Dr
Alessandro Bruno
(Department of Physics, University of Bari, I-70126 Bari, Italy)
7/30/15, 3:30 PM
CR-EX
Poster contribution
Data from the PAMELA satellite experiment were used to measure the geomagnetic cutoff for high-energy (above 80 MeV) protons during the solar particle events on 2006 December 13 and 14. The variations of the cutoff latitude as a function of rigidity were studied on relatively short timescales, corresponding to single spacecraft orbits (about 94 minutes). Estimated cutoff values were...
Dr
Alessandro Bruno
(Department of Physics, University of Bari, I-70126 Bari, Italy)
7/30/15, 3:30 PM
CR-EX
Poster contribution
Data from the PAMELA satellite experiment were used to perform a detailed measurement of under-cutoff protons at low Earth orbit. On the basis of a trajectory tracing approach using a realistic description of the magnetosphere, protons were classified into geomagnetically trapped and albedo. The former includes stably-trapped protons in the South Atlantic Anomaly, which were analyzed in the...
Leonardo Dominguez
(Departamento de Computación de Alta Prestación - Comisión Nacional de Energía Atómica)
7/30/15, 3:30 PM
CR-TH
Poster contribution
In this work we introduce different parallelization schemes implemented in the AIRES (AIR-shower Extended Simulations) software, in order to perform simulations, without thinning algorithm, in HPC clusters.
The AIRES's particle stack was modified to define a new structure allowing its parallelization using MPI library.
Adopting this new structure, three different parallelization tactics were...
Toshiyuki Nonaka
(Institute for Cosmic Ray Research, University of Tokyo)
7/30/15, 3:30 PM
CR-IN
Poster contribution
Measurement of shower particles using scintillators at ground level, with different absorber thicknesses, enables detailed studies of the Telescope Array experiment’s energy scale and of hadronic interaction models. We designed and constructed two types of such detectors. In this report, we present their performance and operational status.
Dr
Brian Flint Rauch
(NASA-Natl. Aeronaut. & Space Admin. (US))
7/30/15, 3:30 PM
CR-IN
Poster contribution
The CALorimetric Electron Telescope (CALET) is a Japanese-Italian-US astroparticle observatory expected to be installed on the ISS in 2015. The main calorimeter (CAL) on CALET is comprised from top to bottom of a charge detector (CHD) with two crossed layers of scintillator paddles, an imaging calorimeter (IMC) with planes of scintillating fibers interleaved with tungsten sheets, and a total...
Yernar Tautayev
(Institute of Physics and Technology, Almaty, Kazakhstan)
7/30/15, 3:30 PM
CR-EX
Poster contribution
Estimation of physical properties of exited fireball from complex final pattern of produced particles is key challenge in nucleus-nucleus collisions at high energies. Effective way to better understanding and interpretation of results consists in analyses of interaction of smaller systems, created in proton-proton or in proton-nucleus collisions.On the basis of such approach interactions of...
Dr
Zhaoyang Feng
(IHEP,CAS)
7/30/15, 3:30 PM
CR-IN
Poster contribution
In order to study ultra-high-energy cosmic-ray (UHECR) sources, we need not only to know their direction, energy and chemical composition, but also large statistics of experimental data, which requires that the detector should have a large effective area and a high duty cycle. Radio antennas present some attractive aspects in this perspective, with very low unit costs, easiness of deployment...
Hisao Tokuno
(UTokyo)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The Telescope Array is a hybrid detector which consists of a surface detector (SD) and three air fluorescence detector sites surrounding the SD array. Hybrid data collection began in May 2008, with independent triggering of the two detector systems. Since October 2010, the SD array has been triggered with an external trigger from the fluorescence detectors (called a "hybrid-trigger") designed...
Dr
Tobias Winchen
(Bergische Universität Wuppertal)
7/30/15, 3:30 PM
CR-EX
Poster contribution
Energy-dependent patterns in the arrival directions of cosmic rays could arise from deflections in galactic and extragalactic magnetic fields. We report on searches for such patterns in the data of the surface detector of the Pierre Auger Observatory at energies above E = 5 EeV in regions within approximately 15° of the arrival directions of events with energy E > 60 EeV. No significant...
Prof.
Tokonatsu Yamamoto
(Konan Univeristy)
7/30/15, 3:30 PM
CR-IN
Poster contribution
We report a search for 12.5 GHz microwave radiation from electron beams in the atmosphere. Ultrahigh-energy cosmic rays (UHECRs) are observed indirectly through extensive air showers (EASs) by particle detectors on the ground or fluorescence detectors using a remote sensing method. If isotropic radiation of microwave from EAS is detected, it can be used for future observation of the UHECR...
Katsuya Yamazaki
(University of Tokyo)
7/30/15, 3:30 PM
CR-EX
Poster contribution
In order to understand sources of ultra high energy cosmic rays, we search for ultra high energy photons with the Telescope Array experiment. The Telescope Array is a hybrid detector consisting of an array of scintillation detectors, which measure the lateral profile of air showers, and fluorescence detectors, which measure the longitudinal profile of air showers. This information is used to...
TOSHIHIRO FUJII
(University of Chicago, University of Tokyo)
7/30/15, 3:30 PM
CR-EX
Poster contribution
Ultra-relativistic magnetic monopoles, possibly a relic of phase transitions in the early universe, would deposit an amount of energy comparable to UHECRs in their passage through the atmosphere, producing highly distinctive air shower profiles. We have performed a search for ultra-relativistic magnetic monopoles in the sample of air showers with profiles measured by the Fluorescence Detector...
Prof.
Rostislav Kokoulin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
7/30/15, 3:30 PM
CR-EX
Poster contribution
Experimental data accumulated in a 3-year long series of measurements (from May 2012 to April 2015) of cosmic ray muon bundles with the coordinate-tracking detector DECOR are analyzed. It has been found that the measured rate of the events exhibits clear seasonal variations, repeated every year of observations. The amplitude of the first annual harmonic of the event rate has been estimated as...
Prof.
Kazuoki Munakata
(Shinshu University, Nagano, Japan)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The IceCube experiment presented in 2012 the declination dependence of the first and second harmonic coefficients of the sidereal cosmic-ray anisotropy at 20 TeV and 400 TeV. In this presentation, we calculate the coefficients for the comic ray data observed by the Tibet ASgamma experiment at median energies of 12 TeV and 300 TeV during a period between November 1999 and May 2010. By using...
Yosui Akaike
(University of Tokyo (JP))
7/30/15, 3:30 PM
CR-IN
Poster contribution
CALorimetric Electron Telescope (CALET) is a detector for the precise measurement of cosmic ray electrons, gamma-rays and nuclei on the International Space Station. CALET has an imaging and a thick calorimeter, which provide excellent energy resolution and particle identification. For the on-orbit calibration, we plan to use the minimum ionizing particles of cosmic rays such as protons and...
Mr
Johannes Schulz
(Department of Astrophysics/IMAPP, Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The Auger Engineering Radio Array (AERA) is a low-energy extension of the Pierre Auger Observatory. It is used to detect radio emission from extensive air showers in the 30 - 80 MHz frequency band. A focus of interest is the dependence of the radio emission on shower parameters such as the energy and the distance to the shower maximum. After three phases of deployment, AERA now consists of 153...
Mr
Jon Paul Lundquist
(Telescope Array Project)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The seven year Telescope Array (TA) Middle Drum hybrid composition measurement shows agreement between Ultra-High Energy Cosmic Ray (UHECR) data and a light composition obtained with QGSJetII-03 or QGSJet-01c models. The data are incompatible with a pure iron composition, for all models examined, for energies log10(E/eV)>18.2. This is consistent with previous TA results. This analysis is...
Javier Gonzalez
(Bartol Research Institute, Univ Delaware)
7/30/15, 3:30 PM
CR-EX
Poster contribution
In this contribution we will consider the methods at our disposal to estimate the mass of primary cosmic rays on an event-by-event basis using IceTop, the surface component of the IceCube detector at the geographical South Pole. We reconstruct the events using two lateral distribution functions, one for the muon component and one for the electrons and gamma rays. This results in a few...
Prof.
Jiwoo Nam
(LeCosPA and Department of Physics, National Taiwan University)
7/30/15, 3:30 PM
CR-IN
Poster contribution
TAROGE is an antenna array on the high mountains of Taiwan’s east coast for the detection of ultra-high energy cosmic ray (UHECR) in energy above 10^19 eV. The antennas will point toward the ocean to detect radiowave signals emitted by the UHECR-induced air-shower as a result of its interaction with the geomagnetic field. Looking down from the coastal mountain, the effective area is enhanced...
Dr
Thomas Stroman
(University of Utah), Dr
Yuichiro Tameda
(Institute for Cosmic Ray Research, University of Tokyo)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The chemical composition of ultra-high-energy cosmic rays (UHECRs) affects the observable distribution of air-shower $X_{\rm max}$ values, the atmospheric slant depth at which the number of secondary shower particles reaches its maximum. The observed $X_{\rm max}$ distributions at various primary UHECR energies can be compared with the distributions predicted by detailed detector simulations...
Anatoly Ivanov
(Shafer Institute for Cosmophysical Research & Aeronomy)
7/30/15, 3:30 PM
CR-EX
Poster contribution
Arrival directions of ultra-high energy cosmic rays (UHECRs) exhibit mainly isotropic distribution with a hint of small deviations in particular energy bins. In this paper available UHECR data are tested for circular uniformity of arrival directions using methods developed in directional statistics.
Dr
Brian Wundheiler
(Instituto de Tecnologías en Detección y Astropartículas)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The AMIGA enhancement (Auger Muons and Infill for
the Ground Array) of the Pierre Auger Observatory consists of a 23.5 km$^2$
infill area where air shower particles are sampled by water-Cherenkov
detectors at the surface and by 30 m$^2$ scintillation counters
buried 2.3 m underground. The Engineering Array of AMIGA, completed since
February 2015, includes 37 scintillator modules (290...
John Krizmanic
(USRA/CRESST/NASA/GSFC)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The Non-Imaging CHErenkov Array (NICHE) will eventually measure the flux and nuclear composition of cosmic rays from below $10^{15}$ eV to $10^{18}$ eV by using measurements of the amplitude and time-spread of the air-shower Cherenkov signal to achieve a robust event-by-event measurement of XMax and energy. NICHE will have sufficient area and angular acceptance to have significant overlap with...
Douglas Bergman
(University of Utah)
7/30/15, 3:30 PM
CR-EX
Poster contribution
Observing UHECR air showers in stereo mode provides a precise measurement of their longitudinal profiles. The Gaisser-Hillas function fits air shower profiles well on average. The range of shower widths can be sensitive to details of average inelasticity and multiplicity in the early part of the shower. Such a measurement can then also be used to constrain the interaction models used in...
Mr
Mohammad Sabouhi
(Department of Physics , Semnan University, P.O. Box 35196-45399, Semnan, Iran)
7/30/15, 3:30 PM
CR-TH
Poster contribution
Abstract: Different type of mechanisms are involved in generation and propagation of radio signals from cosmic ray air showers. The geomagnetic origin is one of such mechanisms which is very important especially in low frequency band studies. Based on CORSIKA and CoREAS we investigate the influence of earth magnetic field parameter on filtered peak radio amplitude patterns in 32–64 MHz...
Christian Sarmiento-Cano
(Universidad Industrial de Santander)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The Space Weather program of the Latin American Giant Observatory (LAGO) is based on the installation of single or small arrays of water-Cherenkov detectors (WCD) spanned across Latin America. The Guane Array is one of the LAGO detection network nodes and it is located in the city of Bucaramanga, Colombia, at $986$ m a.s.l. The array is composed of three autonomous LAGO WCD installed at the...
Oleh Kobzar
(Institute of Nuclear Physics, Polish Academy of Sciences)
7/30/15, 3:30 PM
CR-TH
Poster contribution
Active galactic nuclei (AGN) are considered as one of the most appropriate sources of cosmic rays with energy exceeding $~\sim 10^{18}~$eV. Virgo$~$A (M87 or NGC 4486) is the second closest to the Milky Way active galaxy. According to existing estimations it can be a prominent source of ultra high energy cosmic rays (UHECR). However not many events have been registered in the sky region near...
Justin Bray
(University of Manchester)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The lunar Askaryan technique, which involves searching for Askaryan radio pulses from particle cascades in the outer layers of the Moon, is a method for using the lunar surface as an extremely large detector of ultra-high-energy particles. The high time resolution required to detect these pulses, which have a duration of around a nanosecond, puts this technique in a regime quite different...
Jean-Noël CAPDEVIELLE
(CNRS)
7/30/15, 3:30 PM
CR-TH
Poster contribution
GHOST (1) is .an extension of HDPM (Hybrid dual parton model) originally implemented in CORSIKA(2). It reproduces the pseudo-rapidity charged distribution for NSD events measured by LHCb, CMS and TOTEM …up to √s = 8TeV. At this energy, two pairs of normal generators are centered symmetrically, respectively at small rapidity 1.05 and mid rapidity 4.1, with respective widths 0.95 and 1.8 units...
Christine Peters
(RWTH Aachen University)
7/30/15, 3:30 PM
CR-IN
Poster contribution
Precise measurements of the muon content of extensive air showers are essential for the identification of the chemical composition of ultra-high-energy cosmic rays. We therefore propose a new scintillator detector prototype, the Aachen Muon Detector (AMD). It can complement existing ground arrays composed of e.g. water Cherenkov detector stations. The detector consists of 64 scintillator tiles...
Douglas Bergman
(University of Utah)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The Non-Imaging CHErenkov Array (NICHE) will be a low energy extension to Telescope Array and TALE using an array of closely spaced (~200 m) light collectors covering an area of ~2 square km. It will be deployed in the field of view of TALE and will overlap it in energy range. Showers with energies 1-100 PeV will be reconstructed using both the Cherenkov light Lateral Distribution and the...
Dr
Alexander Karelin
(NRNU MEPhI)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The north-south asymmetry of galactic cosmic rays has been measured in the PAMELA experiment during the time period 2010-2014. Inside this period the solar magnetic field has been flipped. This gave the opportunity to follow the variation of the asymmetry effect. The variation of high energy cosmic rays ratio for particles arriving from Nord and South has been measured with aid of PAMELA...
Dr
Alberto Carramiñana Alonso
(INAOE)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The Latin American Giant Observatory (LAGO) is an extended cosmic ray observatory, which consists in a wide network of water Cherenkov detectors (WCDs) located in nine different countries. The geographic distribution of the LAGO sites, with different altitudes and geomagnetic rigidity cut-offs, combined with the new electronic system for control, atmospheric sensing and data acquisition on...
Mario Pimenta
(LIP Laboratorio de Instrumentaco e Fisica Experimental de Particulas)
7/30/15, 3:30 PM
CR-EX
Poster contribution
In this work we study the energy evolution of the number of muons in air showers. Motivated by future plans for UHECR experiments, the analysis developed here focus on how the evolution of the moments of the shower observables distributions (Xmax and the number of muons at ground) can be used to assess the validity of a mass composition scenario, surpassing the current uncertainties on the...
Dr
Leonid Tkachev
(JINR, Dubna)
7/30/15, 3:30 PM
CR-IN
Poster contribution
The TUS space experiment is aimed to study energy spectrum and arrival distribution of UHECR at energy range above 1020 eV by the measurement of the EAS fluorescent radiation in atmosphere. The TUS mission is planned for launch at the end of 2015 at the dedicated “Lomonosov” satellite. TUSSIM program package was developed to simulate the TUS detector performance including the Fresnel mirror...
Ignacio Minaya
(urn:Google)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The asymmetry in the risetime of signals in Auger surface detector stations with respect to the direction of an incoming air shower is a source of information on shower development. The asymmetry is due to a combination of the longitudinal evolution of the shower and geometrical effects related to the angles of incidence of the particles into the detectors. The magnitude of the effect depends...
Pavel Motloch
(University of Chicago)
7/30/15, 3:30 PM
CR-TH
Poster contribution
Detection of transition radiation from neutrino-induced showers escaping a dense medium is a
promising technique which might be employed in future generations of ultra-high energy
neutrino detectors. Using the well-known Zas-Halzen-Stanev (ZHS) Monte Carlo simulation,
we have computed the electric field created by showers crossing a dense medium-air interface.
Our calculations show that...
Dr
Tanguy Pierog
(KIT)
7/30/15, 3:30 PM
CR-TH
Poster contribution
Interpretation of EAS measurements strongly depends on detailed air shower simulations. One of the big limitations is the calculation time of Monte-Carlo programs like CORSIKA at very high energies. Thinning algorithm has been introduced in the past to reduce the computation time and disk space of the output at the price of the loss of small scale structures in simulated air showers. Thanks to...
Martin Pohl
(DESY)
7/30/15, 3:30 PM
CR-TH
Poster contribution
The anisotropy in cosmic-ray arrival directions in the TeV-PeV energy range shows both large and small-scale structures. While the large-scale anisotropy may arise from diffusive propagation of cosmic rays, the origin of the small-scale structures remains unclear. We perform three-dimensional Monte-Carlo test-particle simulations, in which the particles propagate in both magnetostatic and...
Ms
Monica Nunes
(UNICAMP)
7/30/15, 3:30 PM
CR-EX
Poster contribution
The zenital dependence of muon intensity which reaches the earth's surface is well known as proportional to cos^n (theta). Generally, for practical purposes and simplicity in calculations, n is taken as 2. However, compilations of measurements show dependence on the geographical location of the experiments as well as the muons energy range. Since analytical solutions appear to be increasingly...
