Complex plasma in a stratified glow discharge in a strong magnetic field

E. S. Dzlieva, L. G. D'yachkov, L. A. Novikov, S.I. Pavlov, V.Yu. Karasev

Результат исследований: Научные публикации в периодических изданияхстатья

Аннотация

A dusty plasma was created in a stratified glow discharge in longitudinal magnetic fields above 1 T. Experimental conditions were selected and dust structures were first created in the neon working gas in the magnetic field rangeB= 1.1-2.2 T. Under realized conditions, the electron cyclotron radius is close to the dust particle radius, and the ion cyclotron radius is less than the Debye screening length. Images of dust structure cross sections perpendicular to the magnetic field were obtained. They contain about 10 particles. The dependence of the angular velocity of the dust structure rotation for its widest cross section on magnetic field was measured. The direction of the angular velocity vector coincides with the direction of the magnetic induction vector. In contrast to the previously obtained dependence of the rotation velocity on magnetic field in the regionB<1 T, atB> 1 T the rotation angular velocity ceases to grow, reaching a value of about 3 rad s(-1). To explain the experimental results on the dust structure rotation velocity, an analytical model of the rotation mechanism is proposed. The model is based on the concept of eddy currents in striations and the influence of the magnetic field on the striation length. The obtained estimates of the rotation velocity are in a good agreement with the experimental data.

Язык оригиналаанглийский
Номер статьи085020
Число страниц8
ЖурналPlasma Sources Science and Technology
Том29
Номер выпуска8
DOI
СостояниеОпубликовано - авг 2020

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