Title :
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
fDate :
4/1/2005 12:00:00 AM
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;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2005.845372
