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T: Fachverband Teilchenphysik

T 97: Experimental techniques in astroparticle physics IV

T 97.6: Vortrag

Donnerstag, 18. März 2021, 17:15–17:30, Tv

Calibration of the Auger Radio Detector using the Galactic Emission — •Max Büsken for the Pierre Auger collaboration — Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie

The Pierre Auger Observatory is the largest ground-based experiment for the detection of cosmic rays up to the highest energies. These cosmic rays initiate extensive air showers, whose properties are measured by several different detectors. Among other things there is particular interest in determining the mass composition of the primary particles. New radio antennas will be installed on each of the surface detector stations as part of the AugerPrime upgrade. This will expand mass composition studies to air showers with high inclinations of zenith angles beyond 70°.

An absolute calibration of the deployed antennas is necessary in order to exploit the maximum potential of the new radio detector. In this talk I will explain the procedure to apply the absolute calibration by using the most dominant background signal, which is the emission by our own galaxy, the Milky Way. The comparison of noise traces in the antennas with the expected background signal from simulations allows for the determination of frequency dependent calibration factors. The treatment of sources of uncertainties will be presented in this talk as well.