NDLI: Determination of the equilibrium ion sheath in the drifting plasma by numerical Simulation

Content Provider	IEEE Xplore Digital Library
Author	Dixon Tat-Kun Kwok Oates, T.W.H. McKenzie, D.R. Bilek, M.M.M.
Copyright Year	1973
Abstract	A one-dimensional (1-D) particle-in-cell (PIC) numerical method is developed to determine the equilibrium steady-state sheath width established in a drifting plasma. The simulated and measured steady-state sheath widths are in approximate agreement although the measured width is slightly larger than the simulated. The probe is biased to +90 V and this greatly influences the potential structure within the sheath boundary. The simulation shows that the mean-charge state and mean-atomic-mass approach to dealing with multiple ion species with a range of charge states does not accurately predict the position of the equilibrium sheath when the difference between the charge-to-mass ratios of the ion species is large. A more robust approach is to simulate the steady sheath by a 1-D-PIC method that can handle multiple ion species. In experimental situations where the sample stage is finite in size, the assumption that the equilibrium ion sheath expands from a biased plate of infinite extent may be violated. A two-dimensional PIC numerical method expressed in r-z cylindrical coordinates has been developed to investigate the condition where the 1-D assumption becomes inaccurate. The results confirm that the 1-D-PIC method becomes inaccurate when the steady-state sheath width has dimensions comparable with the sample stage diameter.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	1044
Ending Page	1051
Page Count	8
File Size	423681
File Format	PDF
ISSN	00933813
Volume Number	31
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Plasma sheaths Plasma simulation Numerical simulation Plasma measurements Plasma immersion ion implantation Steady-state Plasma properties Plasma applications Probes Surface discharges
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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