Eur. Phys. J. AP
Volume 22, Number 1, April 2003
|Page(s)||29 - 39|
|Section||Imaging, Microscopy and Spectroscopy|
|Published online||25 February 2003|
A particle-in-cell/Monte Carlo model of the Ar+ ion collection in He gas by a cylindrical Langmuir probe in the transition regime
Dipartimento di Chimica dell'Università and IMIP-CNR, sect. Bari, via Orabona 4,
70126 Bari, Italy
Corresponding author: email@example.com
Revised: 20 December 2002
Accepted: 20 December 2002
Published online: 25 February 2003
This article presents a particle-in-cell (PIC)/test-particle Monte Carlo (TPMC) simulation of the dynamics of Ar+ ions in the region (sheath and presheath) surrounding an attracting cylindrical Langmuir probe at medium He buffer gas pressure. The numerical model is based on a combination of PIC simulation for the ion component and fluid description for the electrons using the Boltzmann relation. The electric field is self-consistently computed via the Poisson equation. The neutrals are modeled directly by an analytical method. The elastic collisions between Ar+ ions and He atoms are accounted for using a TPMC method based on the polarization potential theory. The results of the present simulation are compared with measurements, with other probe theories and the results of other authors simulations.
PACS: 52.65.Rr – Particle-in-cell method / 52.25.Dg – Plasma kinetic equations / 52.40.Hf – Plasma-material interactions; boundary layer effects
© EDP Sciences, 2003
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.