Tunka-Rex: energy reconstruction with a single antenna station
1 Institut für Kernphysik, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
2 Institute of Applied Physics, Irkutsk State University (ISU), Irkutsk, Russia
3 Institut für Prozessdatenverarbeitung und Elektronik, Karlsruhe Institute of Technology (KIT), Germany
4 Skobeltsyn Institute of Nuclear Physics, Lomonossov University (MSU), Moscow, Russia
5 Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia
6 Deutsches Elektronen-Synchrotron (DESY), Zeuthen, Germany
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Published online: 15 March 2017
The Tunka-Radio extension (Tunka-Rex) is a radio detector for air showers in Siberia. From 2012 to 2014, Tunka-Rex operated exclusively together with its host experiment, the air-Cherenkov array Tunka-133, which provided trigger, data acquisition, and an independent air-shower reconstruction. It was shown that the air-shower energy can be reconstructed by Tunka-Rex with a precision of 15% for events with signal in at least 3 antennas, using the radio amplitude at a distance of 120 m from the shower axis as an energy estimator. Using the reconstruction from the host experiment Tunka-133 for the air-shower geometry (shower core and direction), the energy estimator can in principle already be obtained with measurements from a single antenna, close to the reference distance. We present a method for event selection and energy reconstruction, requiring only one antenna, and achieving a precision of about 20%. This method increases the effective detector area and lowers thresholds for zenith angle and energy, resulting in three times more events than in the standard reconstruction.
© The Authors, published by EDP Sciences, 2017
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