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T: Fachverband Teilchenphysik
T 76: Kosmische Strahlung 3
T 76.2: Talk
Wednesday, March 26, 2014, 17:05–17:20, P5
Calibration for the reconstruction of the electrical field with the Tunka Radio Extension (Tunka-Rex) — •Roman Hiller for the Tunka-Rex collaboration — Institut für Kernphysik, Karlsruher Institut für Technologie (KIT)
The Tunka Radio Extension is a radio detector for cosmic ray air showers in Siberia. After its deployment in 2012 and a successful first season, it has been extended to 25 antenna stations in 2013, covering about 1 km2. Triggered by Tunka-133, a non-imaging air-Cherenkov detector for air showers on the site, it is sensitive to the radio emission of air showers from primary cosmic rays with enegies above 1017eV. Our main goal is to cross-calibrate Tunka-Rex and Tunka-133 to explore the precision achievable with the radio detection technique for the reconstruction of primary energy and mass composition. To characterize the radio signal, e.g., to compare it to models, the electrical field vector is reconstructed at each station. Therefore the antenna response has to be known. In a first step, we used an antenna simulation to determine the response and investigate systematic uncertainties. To increase the accuracy, a calibration measurement was performed in 2013 with a prototype station in Karlsruhe. It will be compared to simulations and the impact on the analysis of air shower measurements will be discussed.