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CTA - Abteilung Hinton
Abstract:
The next generation of Gamma-ray observatory - Cherenkov Telescope Array
(CTA) - aims at improving the detection capabilities at a broad energy range of
the gamma-ray spectrum by a factor of 10 in sensitivity. The FlashCam camera is
one of the camera types mounted on the medium-sized telescopes (MST) of CTA,
responsible for the observation of the core energy range between 150 GeV and
5 TeV. The first part of this thesis assumed the task of verifying the trigger system
of FlashCam. Studies of the trigger efficiency and night-sky background light
trigger response were performed, whilst also improving the Monte-Carlo
description of the detector. The second part was dedicated to the research of the
fluorescence light detection capabilities of the full 25 FlashCam-MST sub-array
using simulations. A trigger logic was developed, which allows the detection of
air showers with primary energies higher than 1 PeV through their fluorescence
emission. The effective area of this detection method was determined and the
angular resolution using a shower axis reconstruction calculated. The
combination of these individual studies allowed the estimation of the sensitivity
on point-like gamma-ray sources emitting in the energy range above 1 PeV.
