Field Electron Emission Characteristics of Tungsten–Polyethylene Composite Material As a Source of Electron Emission

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F22%3A00568406" target="_blank" >RIV/68081731:_____/22:00568406 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.yu.edu.jo/jjp/JJPIssues/Vol15No5pdf2022/11.html" target="_blank" >https://journals.yu.edu.jo/jjp/JJPIssues/Vol15No5pdf2022/11.html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.47011/15.5.11" target="_blank" >10.47011/15.5.11</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Field Electron Emission Characteristics of Tungsten–Polyethylene Composite Material As a Source of Electron Emission

Popis výsledku v původním jazyce

This work provides an experimental study on the effects of polyethylene coating on the field electron emission characteristics of clean (uncoated) tungsten tips. Several tungsten tips, with different apex radii, have been prepared, coated with different thicknesses of polyethylene layers and then examined using a standard field electron emission microscope. Various field electron emission characteristics have been measured under high-vacuum conditions. These include current-voltage characteristics, Fowler-Nordheim plots, scanning electron micrographs and spatial current distributions (electron-emission images). Based on this work, it is proved that coating tungsten tips with polyethylene layers has caused dramatic improvements on the tip emission properties. In particular, coating the tips improves the current-voltage characteristics, which is reflected in lowering the extraction voltage, getting more stable emission currents, expressing the current-voltage characteristics using Fowler-Nordheim plots and finally, the spatial distributions of the emitted electrons for the coated tips are more stable and uniform.

Název v anglickém jazyce

Field Electron Emission Characteristics of Tungsten–Polyethylene Composite Material As a Source of Electron Emission

Popis výsledku anglicky

This work provides an experimental study on the effects of polyethylene coating on the field electron emission characteristics of clean (uncoated) tungsten tips. Several tungsten tips, with different apex radii, have been prepared, coated with different thicknesses of polyethylene layers and then examined using a standard field electron emission microscope. Various field electron emission characteristics have been measured under high-vacuum conditions. These include current-voltage characteristics, Fowler-Nordheim plots, scanning electron micrographs and spatial current distributions (electron-emission images). Based on this work, it is proved that coating tungsten tips with polyethylene layers has caused dramatic improvements on the tip emission properties. In particular, coating the tips improves the current-voltage characteristics, which is reflected in lowering the extraction voltage, getting more stable emission currents, expressing the current-voltage characteristics using Fowler-Nordheim plots and finally, the spatial distributions of the emitted electrons for the coated tips are more stable and uniform.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Jordan Journal of Physics

ISSN

1994-7607

e-ISSN

1994-7615

Svazek periodika

15

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

JO - Jordánské hášimovské království

Počet stran výsledku

9

Strana od-do

537-545

Kód UT WoS článku

000964490000011

EID výsledku v databázi Scopus

2-s2.0-85147506236