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KNÁPEK, A.
Originální název
Methods of Preparation and Characterisation of Experimental Field-Emission Cathodes
Typ
teze Ph.D. práce
Jazyk
angličtina
Originální abstrakt
This PhD thesis describes, and covers the preparation of field-emission cathodes that represent a high-quality, inexpensive source of electrons for devices that work with a focused electron beam. In this work, an improved method of electrochemical fabrication is used for the preparation of a composite field-emission cathode. The composite structure improves current stability in comparison to tungsten-based pure field-emission cathodes. Improvements to the technology used were implemented on the basis of findings obtained using spectrum noise diagnostics, which are based on measuring and evaluating the emission current in the time and in frequency domains. Additionally, noise spectroscopy provides important information about charge transport, electron mobility, and lifespan, which is essential for future research. Results obtained using the experimental method have been further supplemented with theoretical data provided by a computer simulation in order to establish characterization procedures for improved field-emission cathodes.
Klíčová slova
field-emission cathode, noise spectroscopy
Autoři
Vydáno
1. 5. 2013
Nakladatel
Vysoké učení technické v Brně, Edice PhD Thesis, sv. 699
Místo
Brno
Strany od
1
Strany do
30
Strany počet
BibTex
@misc{BUT99848, author="Alexandr {Knápek}", title="Methods of Preparation and Characterisation of Experimental Field-Emission Cathodes", year="2013", pages="1--30", publisher="Vysoké učení technické v Brně, Edice PhD Thesis, sv. 699", address="Brno", note="Ph.D. thesis principal points" }