Ion Field Emission from Micron-sized Carbon Dust Grains
Result description
Ion field emission from dust grains was studied using several glassy carbon grains of different radii from 1.64 to 2.97 $mu$m as dust samples. Each grain was stored in a quadrupole trap under UHV conditions for a long time (days) and charged by argon ions to a high surface potential. When the ion gun was switched off the charged grain started to discharge spontaneously. We found out that the discharging process is a combination of field ionization and field desorption. A simple model for ion field emission was developed and the model results were compared with the measured data. Influence of the ion penetration depth on the field ion emission is discussed and compared with different measurements of ion diffusion and consecutive desorption of the implanted ions.
Keywords
The result's identifiers
Result code in IS VaVaI
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Ion Field Emission from Micron-sized Carbon Dust Grains
Original language description
Ion field emission from dust grains was studied using several glassy carbon grains of different radii from 1.64 to 2.97 $mu$m as dust samples. Each grain was stored in a quadrupole trap under UHV conditions for a long time (days) and charged by argon ions to a high surface potential. When the ion gun was switched off the charged grain started to discharge spontaneously. We found out that the discharging process is a combination of field ionization and field desorption. A simple model for ion field emission was developed and the model results were compared with the measured data. Influence of the ion penetration depth on the field ion emission is discussed and compared with different measurements of ion diffusion and consecutive desorption of the implanted ions.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
BL - Plasma physics and discharge through gases
OECD FORD branch
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Result continuities
Project
GA202/08/0063: Laboratory simulations of elementary processes in dusty plasmas
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Z - Vyzkumny zamer (s odkazem do CEZ)
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2009
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´09 Proceedings of Contributed Papers: Part II - Physics of Plasmas and Ionized Media
ISBN
978-80-7378-102-6
ISSN
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e-ISSN
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Number of pages
7
Pages from-to
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Publisher name
Matfyzpress
Place of publication
Prague
Event location
Prague
Event date
Jan 1, 2009
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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Basic information
Result type
D - Article in proceedings
CEP
BL - Plasma physics and discharge through gases
Year of implementation
2009