Experimental observation of multiple double Layers structures in Plasma-part I: concentric multiple double Layers

By applying a positive potential on an electrode immersed in plasma, a complex space charge configuration can be obtained in front of it. Diagnosis methods prove that this structure consist of a positive nucleus (an ion-rich plasma) surrounded by an electrical double layer. Under certain experimenta...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2005-04, Vol.33 (2), p.542-543
Main Authors: Aflori, M., Amarandei, G., Ivan, L.M., Dimitriu, D.G., Sanduloviciu, M.
Format: Article
Language:English
Subjects:
Diagnosis
Double layer
Electric potential
Electrodes
Electron-neutral impact excitations and ionizations
Electrons
Ionization
Luminosity
multiple double layers
Nuclei
Plasma accelerators
Plasma density
Plasma devices
Plasma diagnostics
Plasma measurements
Plasma temperature
self-organization
Shells
Space charge
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Summary:By applying a positive potential on an electrode immersed in plasma, a complex space charge configuration can be obtained in front of it. Diagnosis methods prove that this structure consist of a positive nucleus (an ion-rich plasma) surrounded by an electrical double layer. Under certain experimental conditions, a more complex structure in form of two or more subsequent double layers was observed. It appears as several bright and concentric plasma shells attached to the electrode. The successive double layers are precisely located at the abrupt changes of luminosity between two adjacent plasma shells.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2005.845372