Some Properties of Field ion Emission from SiO2 Grains

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10133186" target="_blank" >RIV/00216208:11320/12:10133186 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.mff.cuni.cz/veda/konference/wds/proc/pdf12/WDS12_226_f2_Vysinka.pdf" target="_blank" >http://www.mff.cuni.cz/veda/konference/wds/proc/pdf12/WDS12_226_f2_Vysinka.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Some Properties of Field ion Emission from SiO2 Grains

Popis výsledku v původním jazyce

Probably the most abundant dust in space constitutes silicates. When the dust grain is exposed to energetic electron or ion beams it can attain a large surface potential which is limited by field ion emission. It is generally expected that the field ionemission is controlled by the surface electric field, and pressure and composition of the ambient atmosphere. In our study, we have used spherical glass dust grains with diameters around 1 micron charged to several kV. Such charging creates the electricfield in the range of 109 V/m leading to observable field ion emission. A positive charge of the dust grain can be reached not only by ion bombardment but, under some circumstances, by electrons as well. Contrary to the expectations, when charged by electrons, the discharging characteristics depends on the obtained specific charge, the energy of impinging electrons and charging current density. Moreover the discharging shows an increase of the discharging current in the beginning. We sho

Název v anglickém jazyce

Some Properties of Field ion Emission from SiO2 Grains

Popis výsledku anglicky

Probably the most abundant dust in space constitutes silicates. When the dust grain is exposed to energetic electron or ion beams it can attain a large surface potential which is limited by field ion emission. It is generally expected that the field ionemission is controlled by the surface electric field, and pressure and composition of the ambient atmosphere. In our study, we have used spherical glass dust grains with diameters around 1 micron charged to several kV. Such charging creates the electricfield in the range of 109 V/m leading to observable field ion emission. A positive charge of the dust grain can be reached not only by ion bombardment but, under some circumstances, by electrons as well. Contrary to the expectations, when charged by electrons, the discharging characteristics depends on the obtained specific charge, the energy of impinging electrons and charging current density. Moreover the discharging shows an increase of the discharging current in the beginning. We sho

Druh

D - Stať ve sborníku

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název statě ve sborníku

WDS'12 Proceedings of Contributed Papers: Part II - Physics of Plasmas and Ionized Media

ISBN

978-80-7378-225-2

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

151-155

Název nakladatele

Matfyzpress

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

29. 5. 2012

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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