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Tests of Silicon detectors for the ATLAS detector upgrade
König, Vít ; Doležal, Zdeněk (advisor) ; Kvasnička, Peter (referee)
Title: Tests of Silicon detectors for the ATLAS detector upgrade Author: Vít König Department: Institute of Particle and Nuclear Physics Supervisor: doc. RNDr. Zdeněk Doležal, Dr., IPNP Abstract: This thesis is focused on the testing of prototypes of strip silicon detectors for the modernization of ATLAS detector on ATLAS Upgrade. These tests take place at the Department of Silicon Detectors at the Institute of Particle and Nuclear Physics. The main focus of this work is the description of tests of Front-end parameters of the detector using the calibration charge and laser. The first chapter of this thesis briefly describes, how the experiment in particle physics works, and summarizes the basic facts about the ATLAS detector and its upgrading. The second chapter describes the physical properties of semiconductors that are needed to understand the principle of particle detection by silicon detectors. It also describes how to read and process information from the detector. The third and fourth chapters describe the testing of FE parameters of the detector, done itself by the author of this work. Conclusions from these measurements will serve to further tests of strip silicon detectors for ATLAS Upgrade. Keywords: ATLAS Upgrade, laser tests, Front-end elektronic, strip silicon detector
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Měření drah částic pomocí vnitřního detektoru ATLAS
Malina, Lukáš ; Doležal, Zdeněk (advisor) ; Černý, Karel (referee)
The SCT is a silicon strip detector forming a part of the tracking system of the ATLAS experiment at the LHC. The tracking performance of SCT is influenced by several fundamental effects: multiple scattering, Lorentz drift, energy loss variation, noise occupancy, and δ-ray production. In this thesis, the task requested by the SCT detector group has been performed. Clusters containing a δ-ray, which are assigned to a track were studied on data samples, specially prepared for this purpose. A correction to the affected cluster positions was successfully developed. The correction to δ-rays has been implemented into the ATHENA reconstruction framework and its performance was evaluated. A meaningful usage of correction for the detector alignment has been proposed. The ongoing detailed verification of the performance within the event reconstruction is partially beyond the scope of the thesis work.
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