Showing papers by "M. Petcu published in 2010"
11 Aug 2010-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: The KASCADE-Grande experiment as mentioned in this paper measured extensive air showers induced by primary cosmic rays in the energy range 1014 − 1018 eV. The major motivation for KASCade-grande is the investigation of the so-called "knee" in energy spectrum of cosmic rays and its presumed rigidity dependence.
Abstract: The KASCADE-Grande experiment measures extensive air showers induced by primary cosmic rays in the energy range 1014 – 1018 eV. The major motivation for KASCADE-Grande is the investigation of the so called ”knee” in the energy spectrum of cosmic rays and its presumed rigidity dependence. A short overview of the experimental setup with focus on the Grande array and its new data acquisition system is given. As an example of analysis the reconstruction of the total muon number is presented.
141 citations
TL;DR: In this article, the lateral distribution of the radio signal in air showers is studied in detail, and it is found that the lateral distributions of the electric field strengths in individual EAS can be described by an exponential function.
79 citations
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TL;DR: In this article, the all-particle energy spectrum as measured by the KASCADE-Grande experiment for E = 10−16} - 10−18 eV is presented within the framework of the QGSJET II/FLUKA hadronic interaction models.
Abstract: The all-particle energy spectrum as measured by the KASCADE-Grande experiment for E = 10^{16} - 10^{18} eV is presented within the framework of the QGSJET II/FLUKA hadronic interaction models. Three different methods were applied based on the muon size and the total number of charged particles individually and in combination. From the study it is found that the spectrum cannot be completely described by a smooth power law due to the presence of characteristic features.
10 citations
11 May 2010-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: The LOPES array as mentioned in this paper is a digital antenna array measuring radio pulses in the frequency range from 40 to 80 MHz, which is located at the site of and triggered by the air shower experiment KASCADE-Grande at Karlsruhe Institute of Technology (KIT), Germany.
Abstract: When ultra high energy cosmic rays hit the atmosphere, they produce a shower of millions of secondary particles. Thereby the charged particles in the shower emit a radio pulse whilst deflected in the Earth's magnetic field. LOPES is a digital antenna array measuring these radio pulses in the frequency range from 40 to 80 MHz. It is located at the site of and triggered by the air shower experiment KASCADE-Grande at Karlsruhe Institute of Technology (KIT), Germany. In its present configuration, it consists of 15 east–west-polarized and 15 north–south-polarized, absolutely calibrated short dipole antennas, as well as 10 LPDAs (with two channels each). Furthermore, it serves as a test bench for technological developments, like new antenna types or a radio-based self-triggering ( LOPES STAR ). To achieve a good angular reconstruction and to digitally form a beam into the arrival direction of the shower, it has a precise time calibration.
8 citations
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TL;DR: In this article, the experimental data are compared to predictions of CORSIKA simulations using high-energy hadronic interaction models (eg QGSJET or EPOS), as well as low-energy interaction models such as FLUKA or GHEISHA.
Abstract: KASCADE-Grande is a large detector array dedicated for studies of high-energy cosmic rays in the primary energy range from 100 TeV to 1 EeV The multi-detector concept of the experimental set-up offers the possibility to measure simultaneously various observables related to the electromagnetic, muonic, and hadronic air shower components The experimental data are compared to predictions of CORSIKA simulations using high-energy hadronic interaction models (eg QGSJET or EPOS), as well as low-energy interaction models (eg FLUKA or GHEISHA) This contribution will summarize the results of such investigations In particular, the validity of the new EPOS version 199 for EAS with energy around 100 PeV will be discussed
2 citations
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TL;DR: In this paper, a large area (128 m^2) was built with the aim to identify muons (E_mu > 0.8 GeV) and their directions in extensive air showers by track measurements under more than 18 r.l.
Abstract: A large area (128 m^2) Muon Tracking Detector (MTD), located within the KASCADE experiment, has been built with the aim to identify muons (E_mu > 0.8 GeV) and their directions in extensive air showers by track measurements under more than 18 r.l. shielding. The orientation of the muon track with respect to the shower axis is expressed in terms of the radial- and tangential angles. By means of triangulation the muon production height H_mu is determined. By means of H_mu, a transition from light to heavy cosmic ray primary particle with increasing shower energy Eo from 1-10 PeV is observed. Muon pseudorapidity distributions for the first interactions above 15 km are studied and compared to Monte Carlo simulations.
2 citations
03 Dec 2010
TL;DR: In this article, the primary energy spectrum of cosmic rays was reconstructed from the experimentally recorded S(500) observable (the density of charged particles at 500 m distance to the shower core) using the KASCADE-Grande detector array.
Abstract: Previous EAS investigations have shown that for a fixed primary energy the charged particle density becomes independent of the primary mass at certain (fixed) distances from the shower core. This feature can be used as an estimator for the primary energy. We present results on the reconstruction of the primary energy spectrum of cosmic rays from the experimentally recorded S(500) observable (the density of charged particles at 500 m distance to the shower core) using the KASCADE‐Grande detector array. The KASCADE‐Grande experiment is hosted by the Karlsruhe Institute for Technology—Campus North, Karlsruhe, Germany, and operated by an international collaboration. The constant intensity cut (CIC) method is applied to evaluate the attenuation of the S(500) observable with the zenith angle and is corrected for. A calibration of S(500) values with the primary energy has been worked out by simulations and was applied to the data to obtain the primary energy spectrum (in the energy range log10[E0/GeV]∈[7.5,9]). ...
1 citations
03 Dec 2010
TL;DR: In this paper, the lateral density of charged particles in the intrinsic shower plane is deduced from the basic information provided by the Grande scintillators, first in the observation plane, by using a Lateral Energy Correction Function (LECF), then in the interior, by applying an adequate mapping procedure.
Abstract: KASCADE‐Grande, an extension of the former KASCADE experiment, is a multi‐component Extensive Air Shower (EAS) experiment located in Karlsruhe Institute of Technology (Campus North), Germany. An important observable for analyzing the EAS is the lateral density of charged particles in the intrinsic shower plane. This observable is deduced from the basic information provided by the Grande scintillators—the energy deposit—first in the observation plane, by using a Lateral Energy Correction Function (LECF), then in the intrinsic shower plane, by applying an adequate mapping procedure. In both steps azimuthal.