Facultatea de Fizică
Universitatea "Al.I.Cuza" Iaşi
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| Titlu: Scenario of transition to chaos by torus breakdown in DP machine plasma, related to the non-concentric multiple double layers |
| Autori: M. Aflori1, L. M. Ivan1, M. Dimitriu2, M. Antohe3, L. Mihaescu1, S. A. Chiriac1, D. G. Dimitriu1 |
| Afiliere: 1Faculty of Physics, „Al. I. Cuza” University of Iasi, Romania
2”Ion Holban” School Group, Iasi, Romania
3”Costin Nenitescu” Industrial School Group, Braila, Romania |
| Abstract: By applying a positive potential on an electrode immersed in plasma, a complex space charge configuration (CSCC) appears in front of it. Diagnosis techniques prove that this structure consists from a positive nucleus (ion-enriched plasma), bordered by an electrical double layer (DL). Under certain experimental conditions, a more complex structure in form of two or more subsequent double layers was observed [1]. It appears as several bright and concentric plasma shells attached to the electrode and was called concentric multiple double layers (MDLs) [2].
If the used electrode is large, the MDLs structure appears non-concentrically, as a network of luminous plasma spots, each near other, almost equally distributed on the electrode surface. The structures appear successively at the increasing of the potential on the electrode, simultaneously with current jumps in the static current-voltage characteristic of the electrode. |
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