Gas rotation in discharge with moving strata in longitudinal magnetic field

Nedospasov, A. V.; Nenova, N. V.

doi:10.1209/0295-5075/108/45001

Cited by 8 publications

(9 citation statements)

References 11 publications

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“…The absolute velocity of the discharge gas rotation due to eddy currents in the strata is defined by the expression [8][9][10][11] (2) Here, n e is the electron concentration, which strongly depends on height h [8,9]; σ a is the gas kinetic scattering cross section of the atom; ω eB is the cyclotron frequency of the electron; and ν ea is the transport frequency of electron-atom collisions. The probe particle acquires the rotational velocity of the gas for characteristic time Δt determined by the friction force between the particle and the gas,…”

Section: Resultsmentioning

confidence: 99%

“…It is this region (h = 0-5 mm) that is of interest for investigation. Below the strata, h = -(15-0) mm, another mechanism of rotation comes into play [8][9][10][11]15], which is beyond the scope of this work.…”

Section: Experimental Datamentioning

confidence: 99%

“…At the same time, the magnetic field changes conditions in the background plasma, especially in heavily inhomogeneous regions. The complex dynamics of dust structures observed in a glow discharge in a magnetic field [5,6] has been widely discussed over the last three years [8][9][10][11]. The choice of an appropriate model for describing the inversion of dust structure angular velocity in a glow discharge in a magnetic field is a subject of current investigations.…”

Section: Introductionmentioning

confidence: 99%

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Ion drag as a mechanism of plasma dust structure rotation in a strata in a magnetic field

et al. 2016

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In experiments on complex plasmas, afixed strata region in which the levitation of dust structures is observed is investigated using the method of probing by calibrated dust particles of different sizes in an applied magnetic field under elevated pressures. The measured azimuthal velocity of the probing particles corresponds to the action of the ion drag force for 4 μm-size particles and to the entrainment by the rotating gas owing to the electron vortex flow inside the strata for 1 μm-size particles. Extrapolation to pressures and magnetic fields in which the rotation inversion of dust structures is observed in experiments shows that the ion drag is the dominating force causing rotation with a negative projection of the angular velocity onto the magnetic induction.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ion drag as a mechanism of plasma dust structure rotation in a strata in a magnetic field

et al. 2016

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“…In the area located in the center of striations (the body of striations) at coordinates from h =5mmtoh = 10 mm in fig. 2 both mechanisms lead particles to rotating in the same direction with negative projection of the angular velocity since eddy current in this area has the component directed radially to the wall of the tube [12][13][14][15]. The assessments of the rotation velocity owing to eddy current and ion drag give the values −(0.15-0.20) rad/sand−0.01 rad/s (for particles of 4.1 µm).…”

Section: -P2mentioning

confidence: 98%

“…In the stratified glow discharge the role of "hot" electrons in discharge processes is very important [17][18][19]. In the recent articles by Nedospasov et al [12][13][14] the existence of electron eddy current in the moving and standing striations was predicted on the basis of [17]. In the magnetic field the eddy current forces the discharge gas to rotate and the dusty plasma is involved in this rotation.…”

Section: Copyright C Epla 2015mentioning

confidence: 99%

Detection of eddy current in the striation

Karasev¹,

Дзлиева²,

Pavlov³

2015

EPL

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EPL, 110 (2015) 55002Please visit the website www.epljournal.orgNote that the author(s) has the following rights: -immediately after publication, to use all or part of the article without revision or modification, including the EPLAformatted version, for personal compilations and use only; -no sooner than 12 months from the date of first publication, to include the accepted manuscript (all or part), but not the EPLA-formatted version, on institute repositories or third-party websites provided a link to the online EPL abstract or EPL homepage is included. For complete copyright details see: https://authors.epletters.net/documents/copyright.pdf. A LETTERS JOURNAL EXPLORING T H E FRONTIERS O F PHYSICS AN INVITATION TO SUBMIT YOUR WORKwww.epljournal.orgThe Editorial Board invites you to submit your letters to EPL EPL is a leading international journal publishing original, innovative Letters in all areas of physics, ranging from condensed matter topics and interdisciplinary research to astrophysics, geophysics, plasma and fusion sciences, including those with application potential.The high profile of the journal combined with the excellent scientific quality of the articles ensures that EPL is an essential resource for its worldwide audience. EPL offers authors global visibility and a great opportunity to share their work with others across the whole of the physics community.Run by active scientists, for scientists EPL is reviewed by scientists for scientists, to serve and support the international scientific community. The Editorial Board is a team of active research scientists with an expert understanding of the needs of both authors and researchers. A LETTERS JOURNAL EXPLORING THE FRONTIERS OF PHYSICS LETTERS JOURNAL EXPLORING T H E FRONTIERS O F PHYSICSQuality -T he 50+ Co -editors, who are experts in their field, oversee the entire peer-review process, from selection of the referees to making all final acceptance decisions.Convenience -Easy to access compilations of recent ar ticles in specif ic nar r ow f ields available on the website.Speed of processing -We aim to pr ovide you with a quick and ef f icient service; the median time from submission to online publication is under 100 days.High visibility -Strong promotion and visibility through material available at over 300 events annually, distributed via e-mail, and targeted mailshot newsletters.International reach -Over 2600 ins titutions have acces s to EPL, enabling your wor k to be read by your peer s in 90 countr ies. Details on preparing, submitting and tracking the progress of your manuscript from submission to acceptance are available on the EPL submission website www.epletters.net.If you would like further information about our author service or EPL in general, please visit www.epljournal.org or e -mail us at info@epljournal.org. Six good reasons to publish with EPLWe want to work with you to gain recognition for your research through worldwide visibilit y and high cit ations. As an EPL author, you will benef it fr om: 560,000 Abstract -The dynamics ...

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The Dynamics of Dust Structures under Magnetic Field in Stratified Glow Discharge

Karasev

Дзлиева

Pavlov

et al. 2016

Contrib. Plasma Phys.

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A detailed research of mechanisms causing the rotation of dust structures formed in striations of the glow discharge in longitudinal magnetic field is presented. Literary data speak about sign‐variable dependence of angular velocity of dust structure on the magnetic field. The first done experiment proves that ion drag force is the reason of rotation with the negative projection of angular velocity on magnetic induction in small magnetic fields. The method of a variation of an ion flux in mixes of gases was used for the research. In the second experiment the gas rotation arising because of eddy electron current in the magnetic field was revealed by the method of probing of the discharge by dust particles. Estimates show that a prevalence of the mechanism of rotation of dust structures and correspondingly the direction of rotation depends both on discharge conditions and on the size of dust particles. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Gas rotation in discharge with moving strata in longitudinal magnetic field

Cited by 8 publications

References 11 publications

Ion drag as a mechanism of plasma dust structure rotation in a strata in a magnetic field

Ion drag as a mechanism of plasma dust structure rotation in a strata in a magnetic field

Detection of eddy current in the striation

The Dynamics of Dust Structures under Magnetic Field in Stratified Glow Discharge

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