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

Author

Aflori, M. ; Amarandei, G. ; Ivan, L.M. ; Dimitriu, D.G. ; Sanduloviciu, M.

Author_Institution

Dept. of Plasma Phys., Univ. of Iasi, Al. Cuza, Romania

Volume

33

Issue

2

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

542

Lastpage

543

Abstract

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.

Keywords

electrodes; plasma diagnostics; plasma sheaths; space charge; concentric multiple double layers; concentric plasma shells; diagnosis methods; electrical double layer; ion-rich plasma; luminosity; plasma multiple double layers structures; positive electrode potential; space charge configuration; Electrodes; Electrons; Ionization; Plasma accelerators; Plasma density; Plasma devices; Plasma diagnostics; Plasma measurements; Plasma temperature; Space charge; Electron-neutral impact excitations and ionizations; multiple double layers; self-organization;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2005.845372

Filename

1420567