Can I read Polarisation Signatures in Radio for Inclined Cosmic-ray Induced Air-shower Identification on EtoBox?

Polarisation Signatures in Radio for Inclined Cosmic-ray Induced Air-shower Identification by Chiche, Simon; Kotera, Kumiko; Martineau-Huynh, Olivier; Tueros, Matias; de Vries, Krijn D. is a scholarly article available to read on EtoBox.

What is Polarisation Signatures in Radio for Inclined Cosmic-ray Induced Air-shower Identification about?

Autonomous radio-detection, i.e., detection of air-showers with standalone radio arrays, is one of the major technical challenges to overcome for the next generation astroparticle detectors. In this context, we study polarisation signatures of simulated radio signals to perform an identification of the associated air-showers initiated by cosmic-rays and neutrinos. We compare the two sources of radio emission (the charge excess and geomagnetic) and show that the former is almost negligible for inclined (zenith angle $>65^{\circ}$) cosmic-ray air-showers. This provides an efficient background rejection criterion at the DAQ level, based on the projection of the total electric field along the direction of the local magnetic field. This relevant quantity can be easily computed -- even in an online treatment -- for antennas measuring three orthogonal polarisations. Independently of the experimental antenna layout, we estimate that assuming a random polarisation of noise events, a rejection from $\approx 72\%$ (for a non favorable detector location) to $\approx 93\%$ (for a favorable location) of the noise induced events and a trigger efficiency of 87% (93%) with a $3\sigma$ ($5\sigma$) t

Author

Chiche, Simon; Kotera, Kumiko; Martineau-Huynh, Olivier; Tueros, Matias; de Vries, Krijn D.

Published

2022

Language

EN