Publication detail

Explanation of the quasi-harmonic field emission behaviour observed on epoxy-coated polymer graphite cathodes

KNÁPEK, A. ALLAHAM, M. BURDA, D. SOBOLA, D. DROZD, M. HORÁČEK, M.

Original Title

Explanation of the quasi-harmonic field emission behaviour observed on epoxy-coated polymer graphite cathodes

Type

journal article in Scopus

Language

English

Original Abstract

In this paper, a new theory is presented to explain the effects of polymer-coated cathodes based on an experiment. Experimental data were obtained by measuring the total emission current from the tip of an electrochemically etched polymer graphite rod, which acts as a disordered array of emission cathodes. Based on the presented experimental results (mainly the time-current characteristics at fixed voltage values), a physical model including an equivalent circuit is presented in this paper to describe its quasi-harmonic behaviour based on the effects of periodic charging and discharging. Explanations of desirable effects such as current stabilization or threshold voltage drop, all of which are due to the dielectric coating and which were previously reported on a single tip, are addressed and put in context with previous results presented by several authors. Finally, based on experimental findings, a possible application of such a pulsing structure towards vacuum devices using emission current is proposed.

Keywords

Composite electron source; Epoxy coating; Field emission; Field emitter; Polymer graphite

Authors

KNÁPEK, A.; ALLAHAM, M.; BURDA, D.; SOBOLA, D.; DROZD, M.; HORÁČEK, M.

Released

27. 12. 2022

Publisher

Elsevier Ltd

ISBN

2352-4928

Periodical

Materials Today Communications

Year of study

34

Number

March

State

United Kingdom of Great Britain and Northern Ireland

Pages count

7

URL

https://www.sciencedirect.com/science/article/pii/S2352492822021110

BibTex

@article{BUT184455,
  author="Alexandr {Knápek} and Mohammad Mahmoud {Allaham} and Daniel {Burda} and Dinara {Sobola} and Michal {Drozd} and Miroslav {Horáček}",
  title="Explanation of the quasi-harmonic field emission behaviour observed on epoxy-coated polymer graphite cathodes",
  journal="Materials Today Communications",
  year="2022",
  volume="34",
  number="March",
  pages="7",
  doi="10.1016/j.mtcomm.2022.105270",
  issn="2352-4928",
  url="https://www.sciencedirect.com/science/article/pii/S2352492822021110"
}