Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 16: Cosmic Rays V

T 16.6: Talk

Monday, March 15, 2021, 17:15–17:30, Tp

Efficiency and aperture estimation of the Tunka-Rex array — •Vladimir Lenok for the Tunka-Rex collaboration — Institute for Astroparticle Physics, Karlsruhe Institute of Technology, Germany

Sparse digital-antenna arrays are a promising technique for the future large-scale observatories of cosmic rays and neutrinos. However, estimation of the efficiency of these instruments is challenging. The efficiency depends on the zenith and azimuth angles. Monte-Carlo simulations of the radio emission of cosmic-ray air showers, which are usually the main tool in assessment of an instrument performance, are computationally intensive. We developed a phenomenological model for the estimation of the detection efficiency. The model is based on a parametrization of the air-shower radio footprint and includes a probabilistic treatment of both, the signal detection by an individual antenna and the shower detection. Currently, the model is under validation against Monte-Carlo simulations and the observational data of the Tunka-133 air-Cherenkov array. We use the model in application to the Tunka-Rex instrument --- a radio-antenna array operated on the site of TAIGA (the Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy). However, the developed model can be applied to any radio antenna array. In the talk we will present the recent updates of the model development and the results of the validation.