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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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Validation of silicon detector simulations for the Belle II experiment
Fajt, Lukáš ; Kvasnička, Peter (advisor) ; Drásal, Zbyněk (referee)
Title: Validation of silicon detector simulations in the Belle II experiment Author: Lukáš Fajt Department: Institute of Particle and Nuclear Physics Supervisor: RNDr. Peter Kvasnička, Institute of Particle and Nuclear Physics Abstract: This bachelor thesis deals with testing of simulations for planned combined Belle II PXD and SVD testbeam at DESY, Germany. This testbeam is going to study the function of a setup of six detectors, two DEPFET pixel detectors and four strip detectors, which corresponds to the actual arrangement of the internal detector of the newly built experiment Belle II in KEK, Japan. For the purpose of testing a new module in the basf2 Belle II software framework was developed. This module should also be used in the future for analysis of experimental data from the testbeam and to compare the results with simulations. In addition to the theoretical knowledge about the Belle II experiment, silicon detectors and basf2, experience with experi- mental work in the clean room at IPNP was obtained. The theoretical part of this work reviews the physical motivation of the experiment as well as the arrangement and operation of the Belle II detector. In the second part we discuss silli- con detectors with an emphasis on DEPFET detectors. We then describe the Belle II software framework, basf2,...
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Cosmic ray study in the Belle II silicon detector
Kapitánová, Lucia ; Doležal, Zdeněk (advisor) ; Sýkora, Martin (referee)
This thesis introduces validation and monitoring tools developed and adjusted for the Belle II vertex detector used during the VXD commissioning run in October and November of 2018. The introductory review part introduces the Belle II detector and provides detailed description of the vertex silicon detector, its components and their functions. Subsequently, the software reconstruction methods are introduced and the applied alignment procedure is explained in the third section. The major focus of this thesis is presentation of validation and monitoring results as well as qualitative description of the measurement precision improvement using cosmic muons trajectories reconstructed in the vertex detector. The last part introduces a new tool for estimation of alignment parameters using monitoring and validation methods. The main purpose of this newly proposed method is to provide fast and credible information about the current alignment status to experts using this data.
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Tests of Semiconductor Detectors in Prague Laboratory
Krásny, Peter ; Kodyš, Peter (advisor) ; Carli, Ina (referee)
This thesis is focused on the usage of silicon semiconductor detectors in ATLAS experiment and automation of safe cooling and heating processes needed during the tests performed on detectors at a given tem- perature. The tests take place in the freezer environment with the place of interest where the detector is to be placed required to stay dry throughout the entire test. This is secured by monitoring the temperature and rela- tive humidity of the environment using Interlock device with sensors and by automatic calculation of the dew point temperature without any supply of nitrogen commonly used in other set ups of the tests. Both cooling and heating processes are being prepared to be fully automatized, reducing the amount of manual handling required to minimum which helps to maintain the conditions and safe run of the test. 1
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Beta Source Tests of Semiconductor Detectors ITk for ATLAS Upgrade
Kovanda, Ondřej ; Kodyš, Peter (advisor) ; Scheirich, Daniel (referee)
Beta Source Tests of Semiconductor Detectors ITk for ATLAS Upgrade Abstract: The ATLAS experiment is due to undergo a major upgrade for the High Luminosity phase of the LHC operation. In particular, the current tracking system (ID) will be replaced by full-silicon ITk. IPNP laboratories are involved in R&D of SCT detector modules for ITk. Low-temperature β-source tests of the R0 FR 5 module prototype were the main focus of this thesis. After testing the cooling cycle, 11 threshold scans were performed on two ABC130 chips, yielding the median collected charge ranging between 2.9 ± 0.2 fC and 3.1 ± 0.2 fC for chip #6 at SNR from 16.0 ± 1.0 at 24 ◦ C to 22.7 ± 1.5 at −15 ◦ C. No trend with temperature was observed outside the error bars. The results are in accordance with previous similar measurements. Question of fitting the median collected charge in various units was adressed and equivalence of the fits was determined. The ability of IPNP laboratories to perform low-temperature β-source tests was proven.
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Simulation and Tests of Strip Semiconductor Detectors for ATLAS Upgrade
Theiner, Ondřej ; Kodyš, Peter (advisor) ; Řezníček, Pavel (referee)
Together with the ongoing works on preparations of High-Luminosity LHC, there is a need to enhance the performance of various experiments on the collider as well. This is also the case of the experiment ATLAS and its subdetectors such as Inner Detector which will be completely replaced by new all-silicon Inner Tracker (ITk). This thesis deals with computer simulations of silicon strip detec- tors for ATLAS Upgrade ITk. For this purpose, we are using framework AllPix2 . It enables to simulate everything from the interaction of the particle with silicon, charge propagation in electric and magnetic fields, charge collection, up to signal digitization. We focused mostly on three aspects in the simulations. The first is a precise characterization of used detectors, the second is a simulation of a test beam measurements and the third one is a simulation of test measurements with a radioactive beta source. We also discussed the possibility of simulation of test measurements with a laser. These simulations are important not only because they help us to better understand processes happening inside the detector, but they are also used as a validation of testing measurements. As a result of this, we are able to point out the effects of the experimental setup (or detector itself) which have an impact on measured...
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Tests of Semiconductor Detectors for ATLAS Upgrade
Sýkora, Martin ; Kodyš, Peter (advisor) ; Mikeštíková, Marcela (referee)
This thesis is focused on beta source tests of prototypes of ITk Strip modules at IPNP in Prague in the framework of the ATLAS Upgrade project. New expe- rimental apparatus will allow comparison of beta source test results with other testing methods including laser or test beam. I participated in the assembly of the whole apparatus, script development for a number of automated measurements using specialized ITSDAQ software and ROOT. Finally, summary of obtained properties of tested end-cap R0 DAQload with mini sensor is provided based on beta source tests and characterization of the readout chip. The resulting collec- ted charge value corresponds to 3.1 fC and together with often referred quantity signal-to-noise ratio, which equals 35, it is one of the most important results of the thesis. The experimental arrangement including overall analysis of results will be usable for the future production phase of the project. 1
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Simulation of Belle II physics events and performance tests of reconstruction software
Kandra, Jakub ; Kvasnička, Peter (advisor) ; Řezníček, Pavel (referee)
This thesis is about the alignment of vertex semiconductor detectors of the Belle II experiment. It is divided into several sections. The first part introduces the Belle II experiment as a new generation B- factory, with its ambitious plans of data taking and physical analysis. The second part follows with a more detailed description of Belle II detector and software tools designed for their alignment and calibration. The central part of the thesis describes physical processes used for calibration of the vertex detector, connected with the search of an optimal solution for run-time monitoring and calibration of the detector. We also tested the effect of misalignment on the Belle II tracking software. The following part gives results of the study of misalignment effects on physical observables related to analysis of selected physical channels. The last part describes the development of a data quality monitoring tool for the tracking system. The tools has to provide a run-time diagnostic of misalignment and miscalibration by monitoring the precision and accuracy of reconstruction of physical observables. Powered by TCPDF (www.tcpdf.org)
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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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Tests of Semiconductor Detectors in Prague Laboratory
Sýkora, Martin ; Kodyš, Peter (advisor) ; Řezníček, Pavel (referee)
This thesis is focused on automatisation and synchronisation of newly installed devices in Prague laboratory. The devices will form an experimental arran- gement not only for laser tests of ITK modules for the ATLAS detector, but also for tests of other types of semiconductor detectors. In addition to ensuring of a central control of the devices the goal of the thesis was to understand the principle of particle detection in high energy physics as well as to get acquainted with the construction of pixel and microstrip detectors. I participated in the development of a script for cont- rolling a laser, 3-axis motorised translation stages, an optical attenuator and a pulse generator via RS-232 and GPIB communication interfaces from an object-oriented program ROOT. Finally, all installed devices were put into operation and a detailed description of their bundled software and internal control commands was included. The apparatus will participate during upcoming years in the research of the new generation of ITK modules for ATLAS upgrade.
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