Facultatea de Fizică
Universitatea "Al.I.Cuza" Iaşi
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| Titlu: Multiple double layers in plasma – experiments and theoretical modeling |
| Autori: Claudia-Teodora Teodorescu-Soare1, Valentina Cloşcă1,2, Dan-Gheorghe Dimitriu1,
Emilia Poll1,3, Maricel Agop4 |
| Afiliere: 1Faculty of Physics, „Alexandru Ioan Cuza“ University of Iaşi, 11 Carol I Blvd, 700506 Iaşi
2Tehnical College of Rădăuţi, 4 Tudor Vladimirescu, 725400 Rădăuţi, Suceava
3“Alexandru Ioan Cuza” National College, 47 Cuza Vodă, 620034 Focşani, Vrancea
4Department of Physics, “Gheorghe Asachi” Technical University, 59A Mangeron Blvd., 700050 Iaşi |
| Abstract: Multiple double layers are complex nonlinear potential structures in plasma, consisting of two or more subsequent double layers [1-4]. It appears as several bright and concentric plasma shells attached to the anode of a glow discharge or to a positively biased electrode immersed into plasma. The successive double layers are precisely located at the abrupt changes of luminosity between two adjacent plasma shells. The axial profile of the plasma potential has a stair steps shape, with potential jumps close to the ionization potential of the used gas [1,3]. At high values of the potential applied to the anode (or the supplementary electrode), the multiple double layers evolve into a dynamic state, consisting of periodic disruptions and reaggregations of the constituent double layers [3]. |
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