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Powder feeding analysis in RF-ICP
Zlatník, Rostislav ; Veverka, Jakub (referee) ; Čížek, Jan (advisor)
The work is focused on the problematics of inductively coupled plasma, which is used for deposition of layers. We focused on two goals in the work. The first one focused on powder feeder, which is working on the vibration principle and is used in an apparatus that is using inductively coupled plasma. The aim is to determine its properties, dependence on different input parameters and working conditions. Is important to verify the suitability of its use for this kind of application. The assumption was to find the ideal configuration of the feeder for the given powder. After an overall assessment of the feeder properties, it was recognized as inappropriate for this application. The second goal is to spray tungsten layers with three different tungsten powders. Layers made with an inductively coupled plasma technology delivers promising results, but this issue needs to be intensively addressed in the future.
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RF-ICP deposition of tungsten coatings
Zlatník, Rostislav ; Houdková, Šárka (referee) ; Čížek, Jan (advisor)
The main object of this work is the technology of radio frequency controlled inductively coupled plasma, abbreviated RF-ICP. The specific goal of the work was the application of surface layers of tungsten and analysis of the influence of changes in process conditions on the resulting microstructure and chemical composition of deposited coatings. The monitored conditions were torch power, choice of carrier gas, powder feedrate.
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Compare prices of electricity from nuclear power and renewable energy sources
Sláma, Miloslav ; Varmuža, Jan (referee) ; Radil, Lukáš (advisor)
This work deals with the components that that creates price of electricity and the regulation of electricity prices. It explains methods of regulation, setting electricity prices. It examines the factors that affect it. It also deals with the calculation of the price of electricity from various energy sources. It studies Support RES system, the conditions for obtaining and statistical data on development aid. It adds alternative sources of energy and their future and security.
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Thermonuclear fusion for power generation
Osolsobě, Jiří ; Elbl, Patrik (referee) ; Sitek, Tomáš (advisor)
Controlled thermonuclear fusion opens up the possibility of using similar principles that take place in stars to produce energy on planet Earth. A fusion power plant would represent a stable, safe, emission-free and, for the foreseeable future, inexhaustible source of energy. Currently, the most researched fusion device is a tokamak using magnetic confinement of plasma, which is likely to become the reactor of the first fusion power plant. The international ITER tokamak will be a breakthrough project for the further development of controlled thermonuclear fusion, with the main objective of testing a number of key technologies and the suitability of the tokamak as a fusion power plant reactor. According to the European Union's plans, construction of the first EU-DEMO fusion power plant should start around 2040. This bachelor thesis provides a comprehensive overview of the origins, current status and future prospects of thermonuclear fusion and its energy applications.
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RF-ICP deposition of tungsten coatings
Zlatník, Rostislav ; Houdková, Šárka (referee) ; Čížek, Jan (advisor)
The main object of this work is the technology of radio frequency controlled inductively coupled plasma, abbreviated RF-ICP. The specific goal of the work was the application of surface layers of tungsten and analysis of the influence of changes in process conditions on the resulting microstructure and chemical composition of deposited coatings. The monitored conditions were torch power, choice of carrier gas, powder feedrate.
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Powder feeding analysis in RF-ICP
Zlatník, Rostislav ; Veverka, Jakub (referee) ; Čížek, Jan (advisor)
The work is focused on the problematics of inductively coupled plasma, which is used for deposition of layers. We focused on two goals in the work. The first one focused on powder feeder, which is working on the vibration principle and is used in an apparatus that is using inductively coupled plasma. The aim is to determine its properties, dependence on different input parameters and working conditions. Is important to verify the suitability of its use for this kind of application. The assumption was to find the ideal configuration of the feeder for the given powder. After an overall assessment of the feeder properties, it was recognized as inappropriate for this application. The second goal is to spray tungsten layers with three different tungsten powders. Layers made with an inductively coupled plasma technology delivers promising results, but this issue needs to be intensively addressed in the future.
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Compare prices of electricity from nuclear power and renewable energy sources
Sláma, Miloslav ; Varmuža, Jan (referee) ; Radil, Lukáš (advisor)
This work deals with the components that that creates price of electricity and the regulation of electricity prices. It explains methods of regulation, setting electricity prices. It examines the factors that affect it. It also deals with the calculation of the price of electricity from various energy sources. It studies Support RES system, the conditions for obtaining and statistical data on development aid. It adds alternative sources of energy and their future and security.
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Poisson Equation Solver Parallelisation for Particle-in-Cell Model
Podolník, Aleš ; Komm, Michael ; Dejarnac, Renaud ; Gunn, J. P.
Numerical simulations based on PIC technique like the SPICE2 model developed at IPP ASCR are often used in tokamak plasma physics to investigate the interaction of edge plasma with plasma-facing components. The SPICE2 model has been parallelised with the exception of the Poisson equation solver which considerably slows down the simulations. It is now being upgraded to a parallelised version to be efficient enough to perform more demanding tasks like the ITER tokamak baseline scenario edge plasma whose conditions like high density (up to 1020 m−3) and low temperature (1–2 eV) result in simulations taking several months to compute. Performance and scaling are compared for different cases in order to choose the optimal candidate for aforementioned applications.
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Heat and Particle Deposition on the Plasma-Facing Components
Podolník, Aleš ; Pánek, Radomír ; Komm, Michael ; Dejarnac, Renaud ; Gunn, J. P.
The interaction of plasma with plasma-facing components (PFCs) in tokamaks is of increasing interest because of implications for ITER and next-step devices. The heat and particle fluxes interacting with solid objects can be studied by means of particle-in-cell (PIC) simulations. The aim of this work is to use the existing family of PIC codes SPICE to simulate the heat and particle flux distribution on PFCs. The output of the simulations is then used in new heat equation solver, which calculates the temperature of the PFCs. This solver provides us a testbed for the parallel sparse matrix code development as well as for the complex application aimed at study of the melting of tiles.
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The properties of Eurofer´97 steel for developed fusion and fission reactors
Stratil, Luděk ; Hadraba, Hynek ; Dlouhý, Ivo
Ferritic martensitic steel show limited swelling and susceptibility to helium effects and can be made from low activation composition. These properties made them the reference steel for the development of breeding blankets in fusion power plants and also for components of fission power plants. Eurofer´97 is presently being characterized in the EU in order to obtain design data for blanket modules to be tested in International Thermonuclear Experimental Reactor (ITER). In this contribution metallurgical (microstructural and mechanical) properties and thermal thermal treatment for such applications are briefly introduced.
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