Number of the records: 1
Explanation of the quasi-harmonic field emission behaviour observed on epoxy-coated polymer graphite cathodes
- 1.
SYSNO ASEP 0570580 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Explanation of the quasi-harmonic field emission behaviour observed on epoxy-coated polymer graphite cathodes Author(s) Knápek, Alexandr (UPT-D) RID, ORCID, SAI
Allaham, Mohammad M. (UPT-D)
Burda, Daniel (UPT-D)
Sobola, Dinara (UPT-D)
Drozd, Michal (UPT-D)
Horáček, Miroslav (UPT-D) RID, ORCID, SAINumber of authors 6 Article number 105270 Source Title Materials Today Communications. - : Elsevier - ISSN 2352-4928
Roč. 34, March (2023)Number of pages 7 s. Publication form Online - E Language eng - English Country NL - Netherlands Keywords Epoxy coating ; Composite electron source ; Field emission ; Field emitter ; Polymer graphite Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering OECD category Electrical and electronic engineering R&D Projects VI20192022147 GA MV - Ministry of Interior (MV) Method of publishing Open access Institutional support UPT-D - RVO:68081731 UT WOS 000991800000001 EID SCOPUS 85145981043 DOI 10.1016/j.mtcomm.2022.105270 Annotation 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. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2024 Electronic address https://www.sciencedirect.com/science/article/pii/S2352492822021110
Number of the records: 1