NDLI: Toward a realistic and tractable model for negative ion extraction from volume sources

Content Provider	IEEE Xplore Digital Library
Author	Whealton, J.H. Olsen, D.K. Raridon, R.J.
Copyright Year	1997
Description	Author affiliation: Oak Ridge Nat. Lab., TN, USA (Whealton, J.H.)
Abstract	The physics of negative ion formation is fundamentally different than that for positive ion formation. For example, with negatively biased plasma electrodes, relative to the plasma, it can be shown that the Bohm sheath stability criteria is not generally satisfied and that, in addition, the potential structure near the extraction region is a saddle point. Traditional modeling of volume negative ion sources treats them in a manner similar to positive ions with a monatomic downhill run of the negative ions from source plasma to extraction and acceleration. This method (for positive ions) consists of finding self consistent solutions to a multidimensional Poisson equation, with the plasma electrons represented as a Boltzmann distribution, and ions as a Vlasov equation simulated by a suitably large number of trajectories with space charge embeddings.
Starting Page	2775
Ending Page	2777
File Size	381687
Page Count	3
File Format	PDF
ISBN	078034376X
DOI	10.1109/PAC.1997.752762
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-05-16
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Plasma sources Plasma sheaths Plasma stability Plasma simulation Plasma accelerators Poisson equations Physics Electrodes Stability criteria Ion sources
Content Type	Text
Resource Type	Article

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