Negative mobilities of electrons in radio frequency fields

In this paper, we perform calculations of mobilities (represented by drift velocities) of electrons in mixtures of F/sub 2/ and Ar in radio frequency (RF) fields. The conditions were chosen which correspond to those that led to observation of negative absolute mobility in dc fields in decaying plasm...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2003-08, Vol.31 (4), p.711-716
Main Authors: Dujko, S., Raspopovic, Z.M., Petrovic, Z.Lj, Makabe, T.
Format: Article
Language:English
Subjects:
Attachment
Charge carrier processes
Collisions
Conductivity
Decay
Delay
Drift
Electron mobility
Electrons
Flux
Kinetic theory
Mathematical analysis
Physics
Plasma
Plasma simulation
Plasma transport processes
Radio frequencies
Radio frequency
Steady-state
X-ray lasers
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Summary:In this paper, we perform calculations of mobilities (represented by drift velocities) of electrons in mixtures of F/sub 2/ and Ar in radio frequency (RF) fields. The conditions were chosen which correspond to those that led to observation of negative absolute mobility in dc fields in decaying plasmas. In RF fields, a similar effect is observed as the mobility corresponding to the flux drift velocity is negative. At the same time, it was found that the mobility corresponding to the bulk drift velocity is mainly positive in respect to the expected value, but that it has a large phase delay. The effect is caused by nonconservative nature of the attachment and in the absence of nonconservative collisions both mobilities are positive and in phase with the field.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2003.815468