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Wave Soldering Fluxes and Flux Residues
Kryll, Josef ; Dušek, Karel (referee) ; Starý, Jiří (advisor)
This work deals with issues of flux residues after wave Soldering. The general aim is to create methodology for measuring the surface insulation resistance values of flux residues after soldering and isothermal heating. Finding the ammount of ionic contamination by using conductometric method. Measurement of wettability of Cu wire by using wetting balance method for different fluxes. The aim is then to compare the measured values with the values dictated by the manufacturer.
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Analysis of the dimensions of pumping channels in a new design of a scintillation detector
Kryll, Josef ; Bílek, Michal (referee) ; Maxa, Jiří (advisor)
The aim of this thesis is to study the issue of eniveromental scanning electron microscopy and pumping gas to create a vacuum in the newly designed scintillation detector. Further, creating a model of recently proposed scintillation detector and simulating and analyzing pumping gas in differentially pumped chamber of detector and the results compare with the previous model. The theoretical part deals with electron microscopy, electron sources, electron optics and secondary electrons detectors. It is also presented which signals are generated by the electron beam on the surface of a solid. Further fluid flow issues and equations describing the flow in the solved chamber are dismantled. Furthermore, the impact of gaseous environment on the trajectory of primary electrons, because there are collisions of primary beam with atoms and molecules of gas. The following section discusses creating, quality and importance of the network in mathematical modelling. A method of a final volume used to calculate the differential equations describing the flow of gas at the premises of the microscope is described . The practical part consists in creating a model of scintillation detector and analyzing the gas flow in drawing a vacuum in the newly designed scintillation detector. Furthermore, the simulation results are compared with the results of simulations on the older type of scintillation detector. The output of this thesis is model of recently proposed scintillation detector with visualized simulation results.
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Analysis of the dimensions of pumping channels in a new design of a scintillation detector
Kryll, Josef ; Bílek, Michal (referee) ; Maxa, Jiří (advisor)
The aim of this thesis is to study the issue of eniveromental scanning electron microscopy and pumping gas to create a vacuum in the newly designed scintillation detector. Further, creating a model of recently proposed scintillation detector and simulating and analyzing pumping gas in differentially pumped chamber of detector and the results compare with the previous model. The theoretical part deals with electron microscopy, electron sources, electron optics and secondary electrons detectors. It is also presented which signals are generated by the electron beam on the surface of a solid. Further fluid flow issues and equations describing the flow in the solved chamber are dismantled. Furthermore, the impact of gaseous environment on the trajectory of primary electrons, because there are collisions of primary beam with atoms and molecules of gas. The following section discusses creating, quality and importance of the network in mathematical modelling. A method of a final volume used to calculate the differential equations describing the flow of gas at the premises of the microscope is described . The practical part consists in creating a model of scintillation detector and analyzing the gas flow in drawing a vacuum in the newly designed scintillation detector. Furthermore, the simulation results are compared with the results of simulations on the older type of scintillation detector. The output of this thesis is model of recently proposed scintillation detector with visualized simulation results.
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|
Wave Soldering Fluxes and Flux Residues
Kryll, Josef ; Dušek, Karel (referee) ; Starý, Jiří (advisor)
This work deals with issues of flux residues after wave Soldering. The general aim is to create methodology for measuring the surface insulation resistance values of flux residues after soldering and isothermal heating. Finding the ammount of ionic contamination by using conductometric method. Measurement of wettability of Cu wire by using wetting balance method for different fluxes. The aim is then to compare the measured values with the values dictated by the manufacturer.
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