Speaker
Nikolay Budnev
(Irkutsk State University)
Description
In autumn of 2012 a EAS Cherenkov light array Tunka-133 with $\sim$3\,km$^2$ geometrical area in the Tunka Valley (50 km from Lake Baikal) for a detailed study of the cosmic ray energy spectrum and the mass composition with energy above 10$^{16}$ eV was combined with new Tunka-Rex (Tunka radio extension) array of about 20 antennas measures the radio emission of cosmic-ray air showers. The last is triggered by the Cherenkov detectors of the Tunka-133 array. The radio-Cherenkov-hybrid measurements thus offer a unique opportunity for a cross-calibration of both detection methods. The main goal of Tunka-Rex is to determine the precision of the radio reconstruction for the energy and the atmospheric depth of the shower maximum, and thus to experimentally test theoretical predictions that the radio precision can be similar to the precision of air-Cherenkov and fluorescence measurements. At the same time, Tunka-Rex can demonstrate that radio measurements can be performed on a large area for a relatively cheap price, since the antennas will be connected to the already existing Tunka DAQ.
The results on the all particles energy spectrum and the mean depth of the EAS maximu vs. primary energy derived from the data of three winter seasons (2009–2012) are presented.
Plans for future upgrades – deployment of remote clusters, a scintillator detector network and a prototype of the HiSCORE gamma-telescope – are discussed.
| quote your primary experiment | Tunka, Baikal |
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Primary author
Nikolay Budnev
(Irkutsk State University)
