Publication detail

Methods of Preparation and Characterisation of Experimental Field-Emission Cathodes

KNÁPEK, A.

Original Title

Methods of Preparation and Characterisation of Experimental Field-Emission Cathodes

Type

Ph.D. thesis principal points

Language

English

Original Abstract

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.

Keywords

field-emission cathode, noise spectroscopy

Authors

KNÁPEK, A.

Released

1. 5. 2013

Publisher

Vysoké učení technické v Brně, Edice PhD Thesis, sv. 699

Location

Brno

Pages from

1

Pages to

30

Pages count

30

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"
}