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National Repository of Grey Literature 12 records found  previous11 - 12  jump to record: Search took 0.01 seconds. 
Adaptation of the UHV SEM system for growth and characterization of nanostructures
 Skladaný, Roman ; Mach, Jindřich (referee) ; Páleníček, Michal (advisor)
This bachelor thesis presents mechanical design of an objective protection of ultrahigh vacuum scanning electron microscope (UHV SEM), which is a part of a complex modular UHV system used for growth, observation and characterisation of nanostructures. Main physical and technical working principles of the UHV SEM system are explained. Furthermore, adaptation of a Knudsen cell used for growth of ultrathin layers in the UHV SEM system is described. Finally, a mechanical design of a shutter reducing overheating and contamination of objective during in situ growth and observation of nanostructures is drafted. The objective shutter also protects the sample from ambient heat radiation in case that sample is cooled to cryogenic temperatures.
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Development of the sample holder for electrical diagnostics in UHV SEM
 Axman, Tomáš ; Pavera, Michal (referee) ; Bábor, Petr (advisor)
This bachelor thesis focuses on design and testing of a sample holder enabling for cooling and heating of the sample in ultra-high vacuum apparatus for scanning electron microscope, developed in cooperation with Tescan company. In the theoretical part the currently used sample holders in similar UHV systems are described and their positives and negatives are discussed including material selection. The experimental part describes designing of the sample holder with respect to the required number of electrical contacts for measuring electrical properties of the samples and UHV compatibility. Measurement and testing of the manufactured sample at low and high temperatures is presented.
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National Repository of Grey Literature : 12 records found   previous11 - 12  jump to record:
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