Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 79: Methods in Astroparticle Physics III

T 79.7: Vortrag

Donnerstag, 3. April 2025, 17:45–18:00, VG 3.101

Analysis of AERA measurements for optimizing the lightning interferometer at the Pierre Auger Observatory^* — •Melanie Joan Weitz for the Pierre-Auger collaboration — Bergische Universität Wuppertal, Wuppertal, Germany

The Pierre Auger Observatory has detected downward terrestrial gamma-ray flashes with its water Cherenkov detectors. A key to understanding this high-energy radiation in thunderstorms is to combine such measurements with those of lightning processes in their earliest stages. The introduced lightning interferometer is a detector currently under construction for imaging lightning propagation in 3D based on radio interferometry. With eleven modified Auger Engineering Radio Array (AERA) stations and their bandwidth range from 30 − 80 MHz the necessary precision can be provided.
One step towards the lightning interferometer data acquisition is to investigate the existing AERA measurements for lightning signal traces and to study their properties. We will present their signal characteristics measured with AERA stations using external lightning information. This allows the optimization of the signal dynamical range for the modified stations.
^*Supported by BMBF Verbundforschung Astroteilchenphysik (Vorhaben 05A23PX1)

Keywords: lightning detection; radio interferometry; terrestrial gamma-ray flashes; Pierre Auger Observatory