Application of particle image velocimetry to dusty plasma systems

Williams, Jeremiah

doi:10.1017/s0022377816000507

Cited by 20 publications

(10 citation statements)

References 78 publications

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“…Ferrite cores are manufactured in a wide variety of shapes, EC, ETD, EF, U, RM, E, and many other shapes. For instance, an E-core has been recommended to be used for an HF power transformer having permeability 10010% [23,5,16,17].…”

Section: Resultsmentioning

confidence: 99%

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Design and Construction of an Atmospheric Pressure HF Plasma Source

Rashid

Herokuzzaman

Rahman

2019

JERR

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Atmospheric pressure plasma sources used in many industrial, environmental, light sources, biological, and medical applications. Aiming these prospects, an effort has been remunerated for the design and construction of a cost-effective atmospheric pressure high frequency (30 KHz) plasma source. The major sections include in this source are, (i) DC power suppliers, (ii) A set of Class A push-pull power amplifiers, (iii) Ferrite core high-frequency power transformer, (iv) Impedance matching network, and (v) Electrode design for plasma production. Two power suppliers have been considered; one is a 12V DC for biasing the base of the 2N3055 power, and the other is a 90V DC for biasing the Class A push-pull power amplifier. Class A push-pull power amplifier is chosen because of its high efficiency of about 50% concerning other types of amplifiers. Ferrite core high-frequency power transformer is designed with a turn ratio of 1:3 in order to step up the voltage to a certain level for producing atmospheric pressure plasma. An impedance matching network is designed to transfer maximum power from the source to the plasma load.

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Section: Resultsmentioning

confidence: 99%

“…These local charge perturbations are confined to volumes of small dimensions. The characteristics dimension of such a charge perturbation is called Debye length [5].…”

Section: Introductionmentioning

confidence: 99%

Design and Construction of an Atmospheric Pressure HF Plasma Source

Rashid

Herokuzzaman

Rahman

2019

JERR

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“…Particle image velocimetry (PIV) analysis is performed on the still images using openPIV software to determine the velocity of the dust particles in a two-dimensional – plane (Taylor et al. 2010; Williams 2016). A total of 850 still images of the rotating dust structure are recorded with a sCMOS camera at a resolution pixel at 142.5 frames per second.…”

Section: Resultsmentioning

confidence: 99%

Dust vortices in a direct current glow discharge plasma: a delicate balance between ion drag and Coulomb force

et al. 2019

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Dust vortices with a void at the centre are reported in this paper. The role of the spatial variation of the plasma potential in the rotation of dust particles is studied in a parallel plate glow discharge plasma. Probe measurements reveal the existence of a local potential minimum in the region of formation of the dust vortex. The minimum in the potential well attracts positively charged ions, while it repels the negatively charged dust particles. Dust rotation is caused by the interplay of the two oppositely directed ion drag and Coulomb forces. The balance between these two forces is found to play a major role in the radial confinement of the dust particles above the cathode surface. Evolution of the dust vortex is studied by increasing the discharge current from 15 to 20 mA. The local minimum of the potential profile is found to coincide with the location of the dust vortex for both values of discharge currents. Additionally, it is found that the size of the dust vortex as well as the void at the centre increases with the discharge current.

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“…Diagnostics of the dust component of dusty plasmas has the goal to measure several quantities: size and chemical composition, [ 105,112,165–169 ] positions and velocities of single microparticles, [ 170–172 ] their number density, and charge. [ 21,173–177 ] Diagnostics of size and chemical composition makes sense only in case they are not known with sufficient accuracy or significantly change during the experiment, that is, when the dust particles are grown in the plasma or undergo significant sputtering.…”

Section: Experimental Techniques and Diagnosticsmentioning

confidence: 99%

Physical aspects of dust–plasma interactions

Pustylnik

Pikalev

Zobnin

et al. 2021

Contributions to Plasma Physics

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Low‐pressure gas discharge plasmas are known to be strongly affected by the presence of small dust particles. This issue plays a role in the investigations of dust particle‐forming plasmas, where the dust‐induced instabilities may affect the properties of synthesized dust particles. Also, gas discharges with large amounts of microparticles are used in microgravity experiments, where strongly coupled subsystems of charged microparticles represent particle‐resolved models of liquids and solids. In this field, deep understanding of dust–plasma interactions is required to construct the discharge configurations which would be able to model the desired generic condensed matter physics as well as, in the interpretation of experiments, to distinguish the plasma phenomena from the generic condensed matter physics phenomena. In this review, we address only physical aspects of dust–plasma interactions, that is, we always imply constant chemical composition of the plasma as well as constant size of the dust particles. We also restrict the review to two discharge types: dc discharge and capacitively coupled rf discharge. We describe the experimental methods used in the investigations of dust–plasma interactions and show the approaches to numerical modelling of the gas discharge plasmas with large amounts of dust. Starting from the basic physical principles governing the dust–plasma interactions, we discuss the state‐of‐the‐art understanding of such complicated, discharge‐type‐specific phenomena as dust‐induced stratification and transverse instability in a dc discharge or void formation and heartbeat instability in an rf discharge.

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Application of particle image velocimetry to dusty plasma systems

Cited by 20 publications

References 78 publications

Design and Construction of an Atmospheric Pressure HF Plasma Source

Design and Construction of an Atmospheric Pressure HF Plasma Source

Dust vortices in a direct current glow discharge plasma: a delicate balance between ion drag and Coulomb force

Physical aspects of dust–plasma interactions

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