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Expected performance of interferometric air-shower measurements with radio antennas

Schlüter, Felix ORCID iD icon 1; Huege, Tim 1
1 Institut für Astroteilchenphysik (IAP), Karlsruher Institut für Technologie (KIT)


Interferometric measurements of the radio emission of extensive air showers allow reconstructing cosmic-ray properties. A recent simulation study with an idealised detector promised measurements of the depth of the shower maximum $X_{max}$ with an accuracy better than 10 g cm$^{−2}$ [1]. In this contribution, we evaluate the potential of interferometric $X_{max}$ measurements of (simulated) inclined air showers with realistically dimensioned, sparse antenna arrays. We account for imperfect time synchronisation between individual antennas and study its inter-dependency with the antenna density in detail.
We find a strong correlation between the antenna multiplicity (per event) and the maximum acceptable inaccuracy in the time synchronisation of individual antennas. From this result, prerequisites for the design of antenna arrays for the application of interferometric measurements can be concluded.
For data recorded with a time synchronisation accurate to 1ns within the commonly used frequency band of 30MHz to 80MHz, an antenna multiplicity of $≳50$ is needed to achieve an $X_{max}$ reconstruction with an accuracy of 20 g cm$^{−2}$.
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Verlagsausgabe §
DOI: 10.5445/IR/1000138433
Veröffentlicht am 15.10.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Publikationstyp Proceedingsbeitrag
Publikationsdatum 18.03.2022
Sprache Englisch
Identifikator ISSN: 1824-8039
KITopen-ID: 1000138433
HGF-Programm 51.13.04 (POF IV, LK 01) Kosmische Strahlung Technologien
Erschienen in Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)
Veranstaltung 37th International Cosmic Ray Conference (ICRC 2021), Online, 12.07.2021 – 23.07.2021
Verlag Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Seiten Article no: 228
Serie Proceedings of Science ; 395
Vorab online veröffentlicht am 29.07.2021
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