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Electron and ion transport in magnetron plasmas

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3 Author(s)
Sheridan, T.E. ; Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242 ; Goeckner, M.J. ; Goree, J.

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We demonstrate experimentally that there is a strong link between electron transport and ion transport in sputtering magnetron plasmas. Electron densities and discharge currents for He, Ne, Ar, Kr, and Xe discharges are measured and used to infer the charged particle confinement time. We find that the confinement time increases with ion mass. Further we find fair agreement between the experimental results and a model which assumes that ion motion is collisionless and unmagnetized, and that the spatial dependence of the electric potential and ion source are similar in the different discharges.

Published in:

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films  (Volume:8 ,  Issue: 3 )