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Title: Energy Distributions of Secondary Electrons Under Different Conditions

Abstract

Secondary emission invoked by energetic electrons can charge dust grains either positively or negatively depending on the grain size, secondary emission yield and electron energy. Emission properties of the grain surface depend on grain's charging history (the impact of energetic ions etc.), but these processes are not well understood.We have carried out a systematic study of aforementioned effects using micron-sized gold spheres as a dust simulants. A single grain was trapped in an electrodynamic trap and exposed to electron and/or ion bombardment in energy range from about 100eV to 10keV. Sophisticated techniques allow us to determine the equilibrium grain charge (surface potential) as a function of the electron beam energy as well as currents flowing to and from the grain, and to separate the current of secondary electrons and determine the energy distribution of these electrons.

Authors:
; ; ;  [1]
  1. Charles University, Faculty of Mathematics and Physics, V Holesovickach 2, Prague (Czech Republic)
Publication Date:
OSTI Identifier:
20726797
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 799; Journal Issue: 1; Conference: 4. international conference on the physics of dusty plasmas, Orleans (France), 13-17 Jun 2005; Other Information: DOI: 10.1063/1.2134647; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DUSTS; ELECTRIC CURRENTS; ELECTRON BEAMS; ENERGY SPECTRA; GOLD; GRAIN SIZE; PLASMA; SECONDARY EMISSION; SURFACE POTENTIAL; SURFACES; TAIL ELECTRONS; TAIL IONS; TRAPPING; TRAPS

Citation Formats

Zilavy, P., Pavlu, J., Nemecek, Z., and Safrankova, J.. Energy Distributions of Secondary Electrons Under Different Conditions. United States: N. p., 2005. Web. doi:10.1063/1.2134647.
Zilavy, P., Pavlu, J., Nemecek, Z., & Safrankova, J.. Energy Distributions of Secondary Electrons Under Different Conditions. United States. doi:10.1063/1.2134647.
Zilavy, P., Pavlu, J., Nemecek, Z., and Safrankova, J.. Mon . "Energy Distributions of Secondary Electrons Under Different Conditions". United States. doi:10.1063/1.2134647.
@article{osti_20726797,
title = {Energy Distributions of Secondary Electrons Under Different Conditions},
author = {Zilavy, P. and Pavlu, J. and Nemecek, Z. and Safrankova, J.},
abstractNote = {Secondary emission invoked by energetic electrons can charge dust grains either positively or negatively depending on the grain size, secondary emission yield and electron energy. Emission properties of the grain surface depend on grain's charging history (the impact of energetic ions etc.), but these processes are not well understood.We have carried out a systematic study of aforementioned effects using micron-sized gold spheres as a dust simulants. A single grain was trapped in an electrodynamic trap and exposed to electron and/or ion bombardment in energy range from about 100eV to 10keV. Sophisticated techniques allow us to determine the equilibrium grain charge (surface potential) as a function of the electron beam energy as well as currents flowing to and from the grain, and to separate the current of secondary electrons and determine the energy distribution of these electrons.},
doi = {10.1063/1.2134647},
journal = {AIP Conference Proceedings},
number = 1,
volume = 799,
place = {United States},
year = {Mon Oct 31 00:00:00 EST 2005},
month = {Mon Oct 31 00:00:00 EST 2005}
}