Field Enhanced Secondary Electron Emission on Glassy Carbon Grains

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F09%3A00207330" target="_blank" >RIV/00216208:11320/09:00207330 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Field Enhanced Secondary Electron Emission on Glassy Carbon Grains

Popis výsledku v původním jazyce

We have investigated the charging of spherical glassy carbon grains of 3 to 6 micrometers in diameter under the influence of high energy electron bombardment. The single grain is trapped in the electrodynamic quadrupole trap and hold there for a long time (up to days). The grain is isolated and therefore its charge can be altered by impinging and leaving electrons only. We are able to continuously monitor the grain charge and we can determine the net current on the grain. We have measured the secondaryelectron-electron emission yield and we have observed the increase of the yield that was attributed to the electric field at the surface of the grain. The relation between the measured yield and primary energy follows the universal curve suggested by Draine (1979) and the total yield increases with square root of the surface electric field according to our results.

Název v anglickém jazyce

Field Enhanced Secondary Electron Emission on Glassy Carbon Grains

Popis výsledku anglicky

We have investigated the charging of spherical glassy carbon grains of 3 to 6 micrometers in diameter under the influence of high energy electron bombardment. The single grain is trapped in the electrodynamic quadrupole trap and hold there for a long time (up to days). The grain is isolated and therefore its charge can be altered by impinging and leaving electrons only. We are able to continuously monitor the grain charge and we can determine the net current on the grain. We have measured the secondaryelectron-electron emission yield and we have observed the increase of the yield that was attributed to the electric field at the surface of the grain. The relation between the measured yield and primary energy follows the universal curve suggested by Draine (1979) and the total yield increases with square root of the surface electric field according to our results.

Druh

D - Stať ve sborníku

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název statě ve sborníku

WDS´09 Proceedings of Contributed Papers: Part II - Physics of Plasmas and Ionized Media

ISBN

978-80-7378-102-6

ISSN

—

e-ISSN

—

Počet stran výsledku

7

Strana od-do

—

Název nakladatele

Matfyzpress

Místo vydání

Prague

Místo konání akce

Prague

Datum konání akce

1. 1. 2009

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

—