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Using Cosmos FloWorks for analyse the detector.
Bordovský, Petr ; Špinka, Jiří (referee) ; Maxa, Jiří (advisor)
This work deal with the analysis of influence of pressure‘s sizes in vacuum chamber of specimen Evironmental Scanning Electron Microscope and the influence of sizes of aperture diaphragm by scintillation detector. The analysis proceeds in detector of secondary electrons. The detector is modelled by system 3D CAD SolidWorks with the help of system CAE Cosmos FloWorks.
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Electron beam welding technology
Skalka, Jan ; Vaněk, Mojmír (referee) ; Richter, Tomáš (advisor)
The bachelor thesis is devoted to analysis of electron beam welding technology. It is unconventional method of welding characterized by high quality weld and narrow heat-affected zone of welded parts. This technology, due to its development and qualities, has found its application in many industries, primarily in aviation and astronautics. The vacuum is limiting feature of this method and it is necessary for electron beam welding. However, even in this area, the development of new technologies have not stopped and generates concrete solutions to those problems. The thesis is also focused on elektron beam welding of rotary parts in the piece and serial production.
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Steam ejector pump
Třináctý, Jan ; Baláš, Marek (referee) ; Šnajdárek, Ladislav (advisor)
The aim of this theses is to do search about maintaining vaccum in surface condensors and subsequently propose basic dimension of one stage steam ejector. The first part deals with the issue of vacuum. The following part is dedicated to description of various types of vacuum pumps. Hence it describes the principle of operation of each pump as well as their output. The following part deals with vacuum and vacuum technology in the field of power engineering. This part is dedicated to those types of vacuum pumps that are used in power engineering, especially to steam ejectors which are most widely used. The final part is addressed to the design of single stage steam ejector. This part contains the calculation of pump dimension. The conclusion evaluates the design of one stage steam ejector.
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Design of Vacuum Clamping System for Students 3D Printer
Mück, Jonáš ; Brada, Michal (referee) ; Koutný, Daniel (advisor)
This thesis is about the structural design of the vacuum clamping worktop in a 3D printer. The first part reviews existing levels of worktops in 3D printers, their applications and extensions. Also, it describes the principle of vacuum and its technical applications. The next section analyzes the principles of vacuum and proposes a solution for its technical use. The last part describes the implementation of the optimal solution, which is applied to the student 3D printer.
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Pressure measurement
Jakubec, Jan ; Císařová, Michaela (referee) ; Podaný, Kamil (advisor)
The project elaborated in a scope of engineer studies in branch 2301R016 submits summary of various methods of pressure measurement. Literary study draws up possibilities and variants of pin-pointing the absolute, relative and barometric pressure, suction, excess pressure and vacuum with analysis of its significance for engineering procedures. Main area is pressure of fluid, piston and bell-shaped gauges, deformation and electrical with examples of their practical use in engineering.
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Development of UHV STM/AFM
Pavelec, Jiří ; Neuman, Jan (referee) ; Kalousek, Radek (advisor)
The main focus of the thesis is on the actuator, which is used for nanopositioning of laser beam in-site AFM (Atomic Force Microscopy). The appropriate shape of supply pulse and frequencies were searched and optimized. They make slip-stick motion of the piezo actuator. Possibilities of solving troubles with UHV (Ultra High Vacuum) are described on the basis of experiment and simulation.
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Morphology study of organic molecular compounds thin films
Schön, Martin ; Vala, Martin (referee) ; Salyk, Ota (advisor)
This thesis deals with morphology study of organic molecular thin film compounds. The vapour deposition was used for thin films preparation. There are described used vacuum technology and measuring instruments in the theoretical part. In the second part is then described the experiment. The characteristics and morphology of thin films have been analyzed by scanning electron microscope (SEM). Influence of deposition temperature and distance between substrate holder and evaporator boat on film morphology have been analyzed. Diketopyrrolopyrrole (DPP) thin films have interesting chemical and physical properties, expecting wide range of applications, especially in electronics industry.
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Special Laboratory Techniques
Boháčová, Zdeňka ; Merna,, Jan (referee) ; Richtera, Lukáš (advisor)
Manipulation with the materials that are very sensitive towards moisture and (or) oxygen requires controlled environment with acceptable content of these undesired species in the range of ppm units. The knowledge of vacuum techniques, techniques of the dry box and Schlenk techniques is necessary in the area of inorganic, organic, and especially organometallic and polymer syntheses. General procedures that are related to these techniques are described in many lecture notes and monographs, but the graphic form which can enhance correct understanding, is often very poor. The thesis is divided into eight chapters, beginning with laboratory safety, risk assessment and the first aid. Following chapter brings useful literature sources. Used glassware, laboratory equipment and accessories and special techniques are described in other chapters. The aim of this work was to create the study materials which could be utilized by the workers dealing with the syntheses of organometallic complexes, catalytic precursors for polymerization and polymerization in itself in the laboratory of polymer synthesis at the Faculty of Chemistry, BUT.
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