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Influence of electron beam injection on plasma parameters and sheath in a dc discharge plasma

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5 Author(s)
Pal, A.R. ; Plasma Physics Group, Materials Science Division, Institute of Advanced Study in Science and Technology, Khanapara, Guwahati-22, Assam, India ; Boruah, D. ; Adhikary, N.C. ; Bailung, H.
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Influence of an electron beam on plasma characteristics and boundary sheath has been investigated experimentally in a dc discharge plasma. This article reports the behavior of the ion sheath formed in front of a negatively biased plate immersed in the plasma, produced in a double plasma device. When a low energy electron beam (Eb=10–50 eV) is injected into the target section, the density as well as the positive ion flux into the sheath increase. As a result, sheath contraction takes place. It is also observed that the floating potential of the plate can be controlled with the help of an electron beam. © 2003 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:94 ,  Issue: 10 )