Preparation and noise analysis of polymer graphite cathode

0495264 - ÚPT 2019 RIV PL eng J - Journal Article
Knápek, Alexandr - Horáček, Miroslav - Chlumská, Jana - Kuparowitz, T. - Sobola, D. - Šikula, J.
Preparation and noise analysis of polymer graphite cathode.
Metrology and Measurement Systems. Roč. 25, č. 3 (2018), s. 451-458. ISSN 0860-8229. E-ISSN 2300-1941
R&D Projects: GA MŠMT ED0017/01/01; GA TA ČR(CZ) TE01020118
Institutional support: RVO:68081731
Keywords : field emission * polymer graphite * noise analysis
OECD category: Electrical and electronic engineering
Impact factor: 1.096, year: 2018

The paper deals with the preparation and measurement of an experimental polymer graphite cathode that seems to be a promising and cheap source of electrons utilizing cold field-emission in high-and ultra-high vacuum. Polymer graphite seems to be a proper material as it contains a large amount of hybridized carbon with a low degree of surface oxidation and silicon monoxide (SiO). Within the frame of this work, a special experimental method of tip preparation has been designed and tuned. This method is based on ion milling inside a dual-beam electron microscope enabling to obtain ultra-sharp tips of a diameter smaller than 100 nm with a predefined opening angle. The charge transport within experimental samples is evaluated based on results provided by the noise spectroscopy of the total emission current in the time and frequency domains.
Permanent Link: http://hdl.handle.net/11104/0288267