Speaker
Frank Schröder
(Karlsruhe Institute of Technology (KIT))
Description
Tunka-Rex (Tunka radio extension) will be an array of about 20 antennas at the Tunka experiment close to Lake Baikal in Siberia. The antennas will be connected directly to the data acquisition of the Tunka main detector, a 1 km² large array of 133 non-imaging photomultipliers observing the Cherenkov light of air showers in dark and clear nights. This allows to cross-calibrate the radio signal with the Cherenkov signal of the same air showers - in particular with respect to the energy and the atmospheric depth of the shower maximum, Xmax. Consequently, theoretical predictions can be tested whether in rural regions with low radio background the radio precision comes indeed close to the precision of the established fluorescence and air-Cherenkov techniques. At a mid-term perspective, due to its higher duty-cycle, Tunka-Rex can then enhance the effective observing time of Tunka by an order of magnitude, at least in the interesting energy range above 100 PeV. Moreover, Tunka-Rex is very cost-effective, e.g., by using economic Short Aperiodic Loaded Loop Antennas (SALLAs). Thus, the results of Tunka-Rex and the comparison to other sophisticated radio arrays will provide crucial input for future large-scale cosmic-ray observatories, for which measurement precision as well as costs per area have to be optimized.
Author
Frank Schröder
(Karlsruhe Institute of Technology (KIT))
Co-authors
- Tunka Collaboration
(-)
Andreas Haungs
(Karlsruhe Institute of Technology)
Christoph Rühle
(IPE, KIT)
Hartmut Gemmeke
(IPE, KIT)
Matthias Kleifges
(IPE, KIT)
Oliver Krömer
(IPE, KIT)
