Lauro-Taroni, L.; Turner, M.M. and Braithwaite, N.St.J.
|DOI (Digital Object Identifier) Link:||http://dx.doi.org/10.1088/0022-3727/37/16/002|
|Google Scholar:||Look up in Google Scholar|
We examine the question of whether the excited states in argon contribute significantly to ionization in a capacitively coupled plasma through metastable pooling and step-ionization processes. We look at this issue by means of a one-dimensional particle-in-cell (PIC) code, with collisions treated by a Monte Carlo collision package. In the range explored, 50–1000 mTorr, the main source of ionization, in the absence of secondary emission, is direct ionization from the ground state with a contribution from excited states that is negligible at lower pressures, but increases in importance at higher pressures. When secondary electrons are included, their interaction with ground state neutrals dominates the ionization. At higher pressures the metastable profiles can reveal useful information on the non-uniform mean electron energy across the discharge, even though these states do not necessarily play a significant role in ionization.
|Item Type:||Journal Article|
|Academic Unit/Department:||Science > Physical Sciences|
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
|Depositing User:||Users 6041 not found.|
|Date Deposited:||17 Jul 2006|
|Last Modified:||05 Mar 2014 10:45|
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