The rotation of planar-2 to planar-12 dust clusters in an axial magnetic field

Cheung, F. M. H.; Samarian, A. A.; James, B. W.

doi:10.1088/1367-2630/5/1/375

Cited by 60 publications

(36 citation statements)

References 30 publications

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“…In some of these experiments, magnetic field was applied. [7][8][9][10][11][12][13] In presence of magnetic field, the electric field inside the plasma induces an azimuthal (E Â B) rotation of ions. It causes the levitated dust particles to rotate in azimuthal direction at low pressures.…”

Section: Introductionmentioning

confidence: 99%

Observation of dust torus with poloidal rotation in direct current glow discharge plasma

et al. 2015

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Observation of dust cloud rotation in parallel-plate DC glow discharge plasma is reported here. The experiments are carried out at high pressures ($130 Pa) with a metallic ring placed on the lower electrode (cathode). The dust cloud rotates poloidally in the vertical plane near the cathode surface. This structure is continuous toroidally. Absence of magnetic field rules out the possibility of E Â B induced ion flow as the cause of dust rotation. The dust rotational structures exist even with water cooled cathode. Therefore, temperature gradient driven mechanisms, such as thermophoretic force, thermal creep flow, and free convection cannot be causing the observed dust rotation. Langmuir probe measurement reveals the existence of a sharp density gradient near the location of the rotating dust cloud. The gradient in the density, giving rise to a gradient in the ion drag force, has been identified as the principal cause behind the rotation of dust particles. V C 2015 AIP Publishing LLC. [http://dx.

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Section: Introductionmentioning

confidence: 99%

Observation of dust torus with poloidal rotation in direct current glow discharge plasma

et al. 2015

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“…Therefore, we expect the magnetic field of moderate diapason to be an effective external factor due to its influence on electrons. In the majority of known experiments with dusty plasmas, where magnetic field lies in moderate diapason, the effect on dusty grains is indirect and caused by the electronic and ionic flows. Therefore, to control dusty plasmas by magnetic field, it will be productive to increase it until just before the decrease of electron gyro radius to the dust particle size.…”

Section: Introductionmentioning

confidence: 99%

Dusty plasma in the stratified glow discharge in moderate magnetic field

Pavlov

Дзлиева

Novikov

et al. 2019

Contributions to Plasma Physics

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This article presents the experimental study of dust structures formed in striations of glow discharge in an external magnetic field of up to 104 G, which was created using a cryomagnet. A magnetic field classification based on probe theory is described. In moderate magnetic field, we obtained stable dust structures. The corresponding experimental setup and the experiment itself are described in detail. Special attention was paid to the influence of magnetic field on the change of the diameter and inter‐particle distance of dusty cloud. And, we also determined the dependence of angular velocity of dust rotation on magnetic induction.

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“…A number of studies have identified several physical phenomena associated with the dusty structures, their geometry, their dynamics in a magnetic field, and the ordering of particles. Nowadays, studies of dusty plasmas in magnetic fields continue, and the magnetic field magnitude range has been sufficiently widened .…”

Section: Introductionmentioning

confidence: 99%

Observation of the dynamics of the dust structure in a dust trap in a double electric layer in a magnetic field up to 10,000 G

Pavlov

Дзлиева

D’yachkov

et al. 2019

Contributions to Plasma Physics

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In this work, we, for the first time, present the experimental study of complex plasmas in glow discharge in the narrow region of the current channel under magnetic fields up to 104 G. We obtain the conditions for the existence and stability of structures under the whole range of the magnetic field. We could detect a record‐breaking rotation velocity of the dusty structure, reaching 15 rad/s. Measurements of the angular velocity behaviour under varied magnetic fields were performed. In order to characterize the geometry of the dusty structure as a function of the magnetic induction, the size and shape of the sections normal to the discharge axis were measured. The inter‐particle distance as another informative characteristic was fixed for structures under a whole range of the applied magnetic field. Based on the results of the mentioned observations, we propose a qualitative interpretation of the rotation variation with the magnetic field. This interpretation includes the model of mechanisms driving the rotation of the dusty structure.

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The rotation of planar-2 to planar-12 dust clusters in an axial magnetic field

Cited by 60 publications

References 30 publications

Observation of dust torus with poloidal rotation in direct current glow discharge plasma

Observation of dust torus with poloidal rotation in direct current glow discharge plasma

Dusty plasma in the stratified glow discharge in moderate magnetic field

Observation of the dynamics of the dust structure in a dust trap in a double electric layer in a magnetic field up to 10,000 G

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