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Some Properties of Field ion Emission from SiO2 Grains

The result's identifiers

  • Result code in 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>

  • Result on the web

    <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

Alternative languages

  • Result language

    angličtina

  • Original language name

    Some Properties of Field ion Emission from SiO2 Grains

  • Original language description

    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

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    BL - Plasma physics and discharge through gases

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    S - Specificky vyzkum na vysokych skolach

Others

  • Publication year

    2012

  • Confidentiality

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

Data specific for result type

  • Article name in the collection

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

  • ISBN

    978-80-7378-225-2

  • ISSN

  • e-ISSN

  • Number of pages

    5

  • Pages from-to

    151-155

  • Publisher name

    Matfyzpress

  • Place of publication

    Praha

  • Event location

    Praha

  • Event date

    May 29, 2012

  • Type of event by nationality

    EUR - Evropská akce

  • UT code for WoS article