Search Results - "Hörandel, J.R."
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Calibration of the LOFAR low-band antennas using the Galaxy and a model of the signal chain
Published in Astroparticle physics (01-09-2019)“…The LOw-Frequency ARray (LOFAR) is used to make precise measurements of radio emission from extensive air showers, yielding information about the primary…”
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A new parametrization for the radio emission of air showers applied to LOFAR data
Published in EPJ Web of Conferences (01-01-2019)“…The energy and mass composition of cosmic rays influence how the energy density of the radio emission of air showers is distributed on the ground. A precise…”
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Journal Article Conference Proceeding -
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The TRACER instrument: A balloon-borne cosmic-ray detector
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (21-10-2011)“…We describe a large-area detector for measurements of the intensity of cosmic-ray nuclei in balloon-borne exposures. In order to observe individual nuclei at…”
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Circular polarization of radio emission from air showers in thunderstorm conditions
Published in EPJ Web of Conferences (01-01-2017)“…We present measured radio emission from cosmic-ray-induced air showers under thunderstorm conditions. We observe for these events large differences in…”
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Journal Article Conference Proceeding -
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KASCADE-Grande: Composition studies in the view of the post-LHC hadronic interaction models
Published in EPJ Web of conferences (2017)“…The KASCADE-Grande experiment has significantly contributed to the current knowledge about the energy spectrum and composition of cosmic rays for energies…”
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Transition radiation detectors for energy measurements at high Lorentz factors
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (01-10-2004)“…The characteristic dependence of the intensity of transition radiation (TR) on the Lorentz factor γ= E/ mc 2 of a primary particle is key to a number of…”
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Evidence for a mixed mass composition at the ‘ankle’ in the cosmic-ray spectrum
Published in Physics letters. B (01-11-2016)“…We report a first measurement for ultrahigh energy cosmic rays of the correlation between the depth of shower maximum and the signal in the water Cherenkov…”
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KASCADE-Grande measurements of energy spectra for elemental groups of cosmic rays
Published in Astroparticle physics (01-07-2013)“…The KASCADE-Grande air shower experiment [1] consists of, among others, a large scintillator array for measurements of charged particles, Nch, and of an array…”
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Reconstructing air shower parameters with LOFAR using event specific GDAS atmosphere
Published in Astroparticle physics (01-12-2020)“…The limited knowledge of atmospheric parameters like humidity, pressure, temperature, and the index of refraction has been one of the important systematic…”
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Ultra high energy cosmic rays The intersection of the Cosmic and Energy Frontiers
Published in Astroparticle physics (01-07-2023)“…The present white paper is submitted as part of the “Snowmass” process to help inform the long-term plans of the United States Department of Energy and the…”
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Probing the evolution of the EAS muon content in the atmosphere with KASCADE-Grande
Published in Astroparticle physics (01-10-2017)“…•The effective muon attenuation and absorption lengths of air showers are investigated.•Air shower data of the KASCADE-Grande observatory is…”
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LORA: A scintillator array for LOFAR to measure extensive air showers
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (11-12-2014)“…The measurement of the radio emission from extensive air showers, induced by high-energy cosmic rays, is one of the key science projects of the LOFAR radio…”
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The spectrum of high-energy cosmic rays measured with KASCADE-Grande
Published in Astroparticle physics (01-08-2012)“…► All-particle energy spectrum of cosmic rays between knee and ankle is not a single power law. ► Just above 1016eV the spectrum exhibits a hardening. ► Around…”
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Distinguishing features of high altitude negative leaders as observed with LOFAR
Published in Atmospheric research (01-10-2021)“…We present high resolution observations of negative leaders at high altitude using the LOFAR radio telescope. We show that the structure of negative leaders at…”
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The KASCADE-Grande experiment
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (11-08-2010)“…KASCADE-Grande is the enlargement of the KASCADE extensive air shower detector, realized to expand the cosmic ray studies from the previous 10 14–10 17 eV…”
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The effect of the atmospheric refractive index on the radio signal of extensive air showers
Published in Astroparticle physics (01-03-2017)“…For the interpretation of measurements of radio emission from extensive air showers, an important systematic uncertainty arises from natural variations of the…”
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The shape of the radio wavefront of extensive air showers as measured with LOFAR
Published in Astroparticle physics (01-02-2015)“…Extensive air showers, induced by high energy cosmic rays impinging on the Earth’s atmosphere, produce radio emission that is measured with the LOFAR radio…”
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Trigger and aperture of the surface detector array of the Pierre Auger Observatory
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (01-01-2010)“…The surface detector array of the Pierre Auger Observatory consists of 1600 water-Cherenkov detectors, for the study of extensive air showers (EAS) generated…”
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KASCADE measurements of energy spectra for elemental groups of cosmic rays: Results and open problems
Published in Astroparticle physics (01-09-2005)“…A composition analysis of KASCADE air shower data is performed by means of unfolding the two-dimensional frequency spectrum of electron and muon numbers. Aim…”
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