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Laser pulse and source response on silicon detectors
Sater, Adrián ; Kodyš, Peter (advisor) ; Řezníček, Pavel (referee)
This thesis is focused on introduction on project CERN and ATLAS and on apparatus used for detection of particles. Moreover, thesis describes upgrades of detection apparatus, whose goal is to increase performance of the ATLAS detector(ATLAS Upgrade), these upgrades should result in increase of centre of mass energy in collisions and luminosity in collider, thus enabling new discoveries. Thesis also describes operation principle of silicon detectors and their utilization in ATLAS and ATLAS Upgrade. Subsequently, in third part of the thesis principle of measurement, data acquisition from measurements and data analysis is explained. The calibration of modules done before measurements is also described. In the last part, thesis focuses on describing various tests used for testing silicon sensors and their application in laboratories of Institute of Particle and Nuclear Physics in Prague. Unfortunately, thesis does not contain practical part in the form of tests on new chips as they were not ready until February 2022 and also the laboratory for laser tests was disassembled due to reconstruction. 1
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Study of the electrical properties of the production silicon strip sensors and test structures for the ATLAS ITk Project
Zatočilová, Iveta ; Mikeštíková, Marcela (advisor) ; Kodyš, Peter (referee)
The properties of silicon detectors can be studied by evaluating electrical tests performed on them. The detection performance of silicon detectors is affected by damages caused by ionizing radiation, neutrons and gamma particles. Ionizing radiation causes bulk and surface damages in silicon detectors. This thesis studies the effects of gamma irradiation on silicon n+ -in-p diodes and their dependence on different initial diode's properties. The thesis also provides the summary of preproduction testing of silicon strip sensors carried out by the Czech ATLAS ITk Strip sensor collaboration at the Institute of Physics of the Czech Academy of Sciences. The silicon strip sensors will be a part of a new all-silicon Inner Tracker (ITk) of the ATLAS experiment that will replace current Inner Detector. The replacement is needed because of the upgrade of the Large Hadron Collider (LHC) into the High-Luminosity LHC.
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Programming of drivers of external devices and data evaluation in C++
Kaščák, Kamil ; Kodyš, Peter (advisor) ; Lokoč, Jakub (referee)
In the present work we study current status of drivers for external devices in clean room in Institute of Particle and Nuclear Physics. In this work we analyse existing software and create a new driver for communication through RS232 port. Work studies various possibilities of serial communication in Windows and Linux and creates possible design for driver, which is based on creating universal layer for supplying communication between user programs and external devices. Work describes important steps of implementation in both operating systems. Next part consists of user documentation for created software. This documentation focuses on di erences of usage in Windows and Linux. At the end work shows report from testing software with real devices and gives advices, which should programmer follows when creating similar software solution.
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Testování ozářených křemíkových detektorů pro experiment ATLAS Upgrade
Novotný, Pavel ; Kodyš, Peter (advisor) ; Carli, Ina (referee)
Participation on development of radiation hard particle detectors for the ATLAS experiment was main goal of this bachelor thesis. Collaboration on the detector development requires understanding of principles of particle detection in HEP experiments. It contains topics of radiation interaction with matter, operation and construction of semiconductor detectors and signal processing. Special attention was paid to radiation damage of silicon detectors. Laser test of irradiated detectors, where operation at low temperature was necessary, were performed. Finally, basic electric characteristics of the detectors were obtained. I participated in preparation and realization of measurement and analysis of the results. Further, the new readout system HSIO was installed with my assistance at the detector laboratory of Institute of Particle and Nuclear Physics in Prague. It will be used in further development of particle detectors for the ATLAS experiment. Powered by TCPDF (www.tcpdf.org)
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Communication with external devices in laboratory
Vachna, Michal ; Kodyš, Peter (advisor) ; Lokoč, Jakub (referee)
In the present work the goal is to map present circumstances of computer infrastructure in the physical laboratory, examine the demands and problems at work in the laboratory such as data backup, remote control, disk space sharing, access organization of processes to external devices, version control of measuring application development, running processes on remote hosts. Assess existing solutions, consider the possibility of improvements and propose new solutions appropriate to the needs of the laboratory. As far as possible, in regard to the current operations of the laboratory, implement solutions to selected problems and requirements. The work has to be methodical material and guide for further development of the laboratory in the coming years.
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Testování polovodičových detektorů typu DEPFET
Malina, Lukáš ; Kodyš, Peter (advisor) ; Doležal, Zdeněk (referee)
DEPFET pixel detectors were developed more than 20 years ago and they are still being improved, for example on Belle II experiment in Japan. In this thesis we studied the properties of readout cycle of detector matrix and the movement of counted hit positions close to the edges of DEPFET matrix, the which is reffered to as edge effect. The main goal of this work was to familiarize with particle detectors and their principles, especially with DEPFET matrices, to set up laser test system and to write ROOT macro for measurement automatization, run the measurement and analyze obtained data. For this purpose we used red 3 nanosecond long laser pulses, moving stages with very fine step and two connected pulse generators. As a result, the voltage between the outer ring and the inner part of the detector active area was optimalised, the edge effect was reduced by a factor of 2. The time properties of readout cycle, the time period of charge clearing and the time in which is the matrix read out, have been found.
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Use of kinematic-constrained decays in the alignment of the Belle II detector.
Kaplan, Martin ; Kodyš, Peter (advisor) ; Kvasnička, Peter (referee)
This thesis is a Monte Carlo study of several distinct samples and some of their combinations for track-based alignment of tracking detectors at the Belle II experiment. Simultaneous alignment of drift chamber layers, vertex detector sensors including their deformation parameters and vertex detector half-shells is performed using a set of linear constraints. Samples of muon tracks from cosmic rays, muon pairs from the e+ e− → µ+ µ− process with and without the inter- action point vertex constraint and muon pairs from the kinematic-constrained J/Ψ → µ+ µ− decay are studied. Performance of certain combinations of sam- ples in the alignment procedure of the tracking detectors is analyzed. One combination of samples is identified as a suitable sample for the alignment of the real detector, which started its operation in spring 2019 and thus the results of this thesis present a first comprehensive analysis of systematic and statistical errors associated with a realistic scenario of the Belle II detector. 1
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