Final results of the LOPES radio interferometer for cosmic-ray air showers

Abstract

LOPES, the LOFAR prototype station, was an antenna array for cosmic-ray air showers operating from 2003 - 2013 within the KASCADE-Grande experiment. Meanwhile, the analysis is finished and the data of air-shower events measured by LOPES are available with open access in the KASCADE Cosmic Ray Data Center (KCDC). This article intends to provide a summary of the achievements, results, and lessons learned from LOPES. By digital, interferometric beamforming the detection of air showers became possible in the radio-loud environment of the Karlsruhe Institute of Technology (KIT). As a prototype experiment, LOPES tested several antenna types, array configurations and calibration techniques, and pioneered analysis methods for the reconstruction of the most important shower parameters, i.e., the arrival direction, the energy, and mass-dependent observables such as the position of the shower maximum. In addition to a review and update of previously published results, we also present new results based on end-to-end simulations including all known instrumental properties. For this, we applied the detector response to radio signals simulated with the CoREAS extension of CORSIKA, and analyzed them in the same way as measured data. Thus, we were able to study the detector performance more accurately than before, including some previously inaccessible features such as the impact of noise on the interferometric cross-correlation beam. These results led to several improvements, which are documented in this paper and can provide useful input for the design of future cosmic-ray experiments based on the digital radio-detection technique.

Accepted for publication by EPJ C

References in corpus (27)

• Radio detection of Cosmic-Ray Air Showers and High-Energy Neutrinos
• A method for high precision reconstruction of air shower Xmax using two-dimensional radio intensity profiles
• Radio detection of air showers with the ARIANNA experiment on the Ross Ice Shelf
• REAS3: Monte Carlo simulations of radio emission from cosmic ray air showers using an "end-point" formalism
• Dependence of geosynchrotron radio emission on the energy and depth of maximum of cosmic ray showers
• Reconstruction of the energy and depth of maximum of cosmic-ray air-showers from LOPES radio measurements
• Polarized radio emission from extensive air showers measured with LOFAR
• NuRadioReco: A reconstruction framework for radio neutrino detectors
• The shape of the radio wavefront of extensive air showers as measured with LOFAR
• A comparison of the cosmic-ray energy scales of Tunka-133 and KASCADE-Grande via their radio extensions Tunka-Rex and LOPES
• Probing Atmospheric Electric Fields in Thunderstorms through Radio Emission from Cosmic-Ray-Induced Air Showers
• Experimental evidence for the sensitivity of the air-shower radio signal to the longitudinal shower development
• Amplitude calibration of a digital radio antenna array for measuring cosmic ray air showers
• The radio emission pattern of air showers as measured with LOFAR - a tool for the reconstruction of the energy and the shower maximum
• The wavefront of the radio signal emitted by cosmic ray air showers
• First Experimental Characterization of Microwave Emission from Cosmic Ray Air Showers
• Measurement of the circular polarization in radio emission from extensive air showers confirms emission mechanisms
• Progress in Air Shower Radio Measurements: Detection of Distant Events
• Frequency spectra of cosmic ray air shower radio emission measured with LOPES
• Thunderstorm Observations by Air-Shower Radio Antenna Arrays
• A Scintillator and Radio Enhancement of the IceCube Surface Detector Array
• Direction identification in radio images of cosmic-ray air showers detected with LOPES and KASCADE
• Enhancing the cosmic-ray mass sensitivity of air-shower arrays by combining radio and muon detectors
• Radio emission of highly inclined cosmic ray air showers measured with LOPES
• LOPES-3D, an antenna array for full signal detection of air-shower radio emission
• Radio detection of cosmic rays with the Auger Engineering Radio Array
• Radio detection of cosmic rays in [1.7-3.7] MHz: the EXTASIS experiment

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• Ultra-High-Energy Cosmic Rays: The Intersection of the Cosmic and Energy Frontiers
• Simulation of in-ice cosmic ray air shower induced particle cascades
• Radio interferometry applied to the observation of cosmic-ray induced extensive air showers
• Framework and Tools for the Simulation and Analysis of the Radio Emission from Air Showers at IceCube
• Expected performance of air-shower measurements with the radio-interferometric technique
• The Radar Echo Telescope for Cosmic Rays: Pathfinder Experiment for a Next-Generation Neutrino Observatory
• Simulating radio emission from particle cascades with CORSIKA 8
• Studying the mass sensitivity of air-shower observables using simulated cosmic rays
• Aperture correction for Beamforming in radiometric detection of ultra-high energy cosmic rays
• Radio Detection of ultra-high-energy Cosmic-Ray Air Showers