Volume 99, Number 3, August 2012
|Number of page(s)||5|
|Section||Physics of Gases, Plasmas and Electric Discharges|
|Published online||08 August 2012|
Ambipolar diffusion in strongly electronegative plasma
1 Kharkov National University - Svobody Sq. 4, Kharkov 61022, Ukraine
2 Scientific Center of Physical Technologies - Svobody Sq. 6, Kharkov 61022, Ukraine
Received: 24 May 2012
Accepted: 4 July 2012
This paper studies the ambipolar diffusion in an electronegative plasma containing electrons, a single species of negative ions and a single species of positive ions. We demonstrate that in a plasma with the concentration of negative ions more than 10 times exceeding that of electrons one has to take into account the mobility of negative and positive ions. We established that in a strongly electronegative plasma (when the ratio of the concentration of negative ions and that of electrons α = n−/ne ≫ 1 and μe ≪ α·μ−, where μe and μ− are the mobilities of electrons and negative ions) the diffusion ceases to be ambipolar, and the coefficients of ambipolar diffusion of the charged particles become approximately equal to their coefficients of free diffusion.
PACS: 52.25.Fi – Transport properties / 52.27.Cm – Multicomponent and negative-ion plasmas / 52.80.Hc – Glow; corona
© EPLA, 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.