TY - JOUR

T1 - Complex plasma in a stratified glow discharge in a strong magnetic field

AU - Dzlieva, E. S.

AU - D'yachkov, L. G.

AU - Novikov, L. A.

AU - Pavlov, S.I.

AU - Karasev, V.Yu.

PY - 2020/8/1

Y1 - 2020/8/1

N2 - 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.

AB - 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.

KW - dust particle structure

KW - complex plasma

KW - magnetic field

KW - dust particle rotation

KW - ion drag

KW - DC discharge

KW - NONLOCAL ELECTRON KINETICS

KW - IONIZATION WAVES

KW - DUST STRUCTURES

KW - ROTATION

KW - GAS

KW - PARTICLES

KW - STRIATION

KW - DYNAMICS

KW - DRIFT

KW - Dust particle rotation

KW - Dc discharge

KW - Complex plasma

KW - Dust particle structure

KW - Ion drag

KW - Magnetic field

UR - http://www.scopus.com/inward/record.url?scp=85092309107&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/aa7080a2-b8c3-3702-8854-e28af4576a1a/

U2 - 10.1088/1361-6595/aba8cd

DO - 10.1088/1361-6595/aba8cd

M3 - Article

VL - 29

JO - Plasma Sources Science and Technology

JF - Plasma Sources Science and Technology

SN - 0963-0252

IS - 8

M1 - 085020

ER -