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15Complex Systems of Charged Particles and their Interactions with Electromagnetic Radiation 2019
FEATURES OF FORMATION OF DUSTY PLASMAS IN A GLOW DISCHARGE IN STRONG MAGNETIC FIELD
V.Yu. Karasev, E.S. Dzlieva, S.I. Pavlov, L.A. Novikov
Saint Petersburg State University, Saint-Petersburg, Russia, e-mail: plasmadust@yandex.ru
Dust traps in DC discharge differ from traps in RF discharges of both type: capacitive and induction ones. The difference, first of all, lies in the magnitude of the main parameters of the plasma - energy and spatial distribution of electrons, as well as in the heterogeneity of the plasma and the intensity of its flows. When a magnetic field is applied, these differences are clearly manifested, for example, by the nature and magnitude of the rotation speed, as well as by the geometry of dust structures [1-4].
In the glow discharge, dust traps are known in strata [5-6], above the wall of the discharge chamber (insert) [7], and in the region of narrowing the current channel [8]. The presented report deals with the features of the formation of plasma-dust structures in these traps when a strong magnetic field is applied. We discuss the creation of stable structures, changes in their geometric parameters, as well as the mechanisms that lead to the rotation of the structure with a significantly high angular velocity.
Experimental study of the appearance of shell structures in helium was supported by RFBR, grant № 18-02-00113. The research in neon was supported by RSF, grant № 18-12-00009.
References
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[8] E.S.Dzlieva, V.Yu. Karasev, S.I. Pavlov 2016 Plasma Physics Reports 42 (2) 147.
