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

Kaur, Manjit; Bose, Sayak; Chattopadhyay, P. K.; Sharma, Devendra; Ghosh, Joydeep; Saxena, Y. C.

doi:10.1063/1.4916065

Cited by 25 publications

(23 citation statements)

References 39 publications

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“…Our results have inspired other researchers in wider fields beyond plasma physics [64][65][66][67][68][69][70][71][72][73][74][75][76]. The followings are examples.…”

Section: Summary and Subsequent Developmentsupporting

confidence: 68%

Dynamic Behavior of Dust Particles in Plasmas

Saitou¹,

Ishihara²

2020

Progress in Fine Particle Plasmas

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Experimentally observed dynamic behavior, such as a particle circulation under magnetic field, a bow shock formation in an upper stream of an obstacle, etc., will be reviewed. Dust particles confined in a cylindrical glass tube show a dynamic circulation when strong magnetic field is applied from the bottom of the tube using a permanent magnet. The circulation consists of two kinds of motions: one is a toroidal rotation around the tube axis, and the other is a poloidal rotation. Dust particles are blown upward from near the bottom of the tube against the gravity neighborhood of the tube axis. A two-dimensional supersonic flow of dust particles forms a bow shock in front of a needlelike-shaped obstacle when the flow crosses the obstacle. The slower flow passes the obstacle as a laminar flow. A streamlineshaped void where dust particles are not observed is formed around the obstacle.

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“…Our results have inspired other researchers in wider fields beyond plasma physics [64][65][66][67][68][69][70][71][72][73][74][75][76]. The followings are examples.…”

Section: Summary and Subsequent Developmentsupporting

confidence: 68%

Dynamic Behavior of Dust Particles in Plasmas

Saitou¹,

Ishihara²

2020

Progress in Fine Particle Plasmas

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“…A detailed description of CPED is given by Kaur et al. (2015 a , 2016). Argon plasma is produced by applying a potential difference between coaxially arranged disc electrodes.…”

Section: Design Of Langmuir Probe Systems For Measurement In a Complementioning

confidence: 99%

“…2015; Kaur et al. 2015 a ). Considering that the plasma parameters determined from the current–voltage ( – ) characteristics of a probe are dependent on its collecting area, minimization of coating of the probe surface by charged dust grains is a necessity.…”

Section: Introductionmentioning

confidence: 99%

Langmuir probe in collisionless and collisional plasma including dusty plasma

et al. 2017

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Measurements of local plasma parameters in dusty plasma are crucial for understanding the physics issues related to such systems. The Langmuir probe, a small electrode immersed in the plasma, provides such measurements. However, designing of a Langmuir probe system in a dusty plasma environment demands special consideration. First, the probe has to be miniaturized enough so that its perturbation on the ambient dust structure is minimal. At the same time, the probe dimensions must be such that a well-defined theory exists for interpretation of its characteristics. The associated instrumentation must also support the measurement of current collected by the probe with high signal to noise ratio. The most important consideration, of course, comes from the fact that the probes are prone to dust contamination, as the dust particles tend to stick to the probe surface and alter the current collecting area in unpredictable ways. This article describes the design and operation of a Langmuir probe system that resolves these challenging issues in dusty plasma. In doing so, first, different theories that are used to interpret the probe characteristics in collisionless as well as in collisional regimes are discussed, with special emphasis on application. The critical issues associated with the current–voltage characteristics of Langmuir probe obtained in different operating regimes are discussed. Then, an algorithm for processing these characteristics efficiently in presence of ion-neutral collisions in the probe sheath is presented.

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“…Here, a dust cloud composed of 6.48 µm diameter melamine microspheres was formed in an argon DC glow discharge plasma. A 1-2 mm thick slice of the dust cloud was illuminated using a 100 mW CW laser and imaged using a CMOS camera operating at 204 fps (figure 4a) (Kaur et al 2015a). The time-resolved PIV technique was applied to sequential images to find the particle motion within the dust cloud (figure 4b), and the vorticity was calculated from the vector field found using the PIV technique (figure 4c).…”

Section: Representative Measurementsmentioning

confidence: 99%

Application of particle image velocimetry to dusty plasma systems

Williams

2016

J. Plasma Phys.

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Particle image velocimetry is a fluid measurement technique that has been used for more than 20 years to characterize the particle transport and thermal state of dusty plasma systems. This manuscript provides an overview of this diagnostic technique, highlighting the strengths and limitations that are associated with its use. Additionally, the variations of this technique that have been applied in the study of dusty plasma systems will be discussed, along with a small selection of measurements that can be made with the technique. Potential future directions for this diagnostic tool within the dusty plasma community will also be discussed.

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

Cited by 25 publications

References 39 publications

Dynamic Behavior of Dust Particles in Plasmas

Dynamic Behavior of Dust Particles in Plasmas

Langmuir probe in collisionless and collisional plasma including dusty plasma

Application of particle image velocimetry to dusty plasma systems

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