Original title: Měření energetického spektra kosmického záření s využitím událostí bohatých na čerenkovské záření na Observatoři Pierra Augera
Translated title: Measurement of the energy spectrum of cosmic rays using Cherenkov-dominated data at the Pierre Auger Observatory
Authors: Novotný, Vladimír ; Nosek, Dalibor (advisor)
Document type: Rigorous theses
Year: 2020
Language: eng
Abstract: This thesis presents the energy spectrum of cosmic rays deduced from Cherenkov-dominated data measured by the fluorescence detector of the Pierre Auger Observatory. Cherenkov-dominated events, used in the energy spectrum analysis at the Observatory for the first time, enable to decrease the energy threshold for the spectrum measurement down to 1015.5 eV. This energy is more than one order of magnitude lower than in preceding studies. The fluorescence detector was originally designed to detect the fluorescence light generated by extensive air showers in a hybrid mode with the surface detector of the Pierre Auger Observatory. The reconstruction of events dom- inated by Cherenkov light is available due to a newly developed reconstruc- tion technique, the profile constrained geometry fit. Its implementation in the Pierre Auger Observatory software is documented. Aspects of the energy spectrum analysis are described. They consist of exposure calculations done with the use of extensive Monte Carlo simulations, unfolding of the detec- tor effects, and inferring the invisible energy correction in the energy region below 1017 eV. Systematic uncertainties of the measurement are estimated. 1
Keywords: Cherenkov-dominated events; cosmic rays; energy spectrum; invisible energy; Pierre Auger Observatory; energetické spektrum; kosmické záření; nezachycená energie; Observatoř Pierra Augera; události bohaté na čerenkovské záření

Institution: Charles University Faculties (theses) (web)
Document availability information: Available in the Charles University Digital Repository.
Original record: http://hdl.handle.net/20.500.11956/120201

Permalink: http://www.nusl.cz/ntk/nusl-437287


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Academic theses (ETDs) > Rigorous theses