The magnetized dusty plasma experiment (MDPX)

Thomas, E.; Konopka, Uwe; Artis, D.; Lynch, Brian; LeBlanc, Spencer; Adams, Stephen; Merlino, R. L.; Rosenberg, M.

doi:10.1017/s0022377815000148

Cited by 48 publications

(28 citation statements)

References 59 publications

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“…Here, the filaments are observed in visible light emission from an argon CCP plasma in the Magnetized Dusty Plasma Experiment (MDPX) device at Auburn University. 22,23 The filaments form between a powered, 30 cm diameter, lower electrode and a grounded, 30 cm diameter, upper electrode that has a 15 cm diameter hole that is covered by an indium-tin-oxide (ITO)-coated (i.e., conducting surface) glass plate. The filaments are viewed through a 25 cm diameter viewport at the top of the vacuum chamber.…”

Section: Introductionmentioning

confidence: 99%

Filamentation of capacitively coupled plasmas in large magnetic fields

2019

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Over the last decade, dusty plasma research has sought to explore the physics of magnetized dusty plasmas. Due to the small charge-to-mass ratio of micron-sized dust grains, magnetic fields of B ! 1 T are needed to magnetize these particles. A peculiar phenomenon that occurs in capacitively coupled, glow discharge dusty plasmas at high magnetic fields that are perpendicular to the electrodes is the formation of stationary or mobile filamentary structures that are aligned along the magnetic field. In experiments, these filaments are found to form at a low neutral gas pressure, low applied radio frequency power, and a high magnetic field. This paper reports on new simulations of capacitively coupled plasmas at a high magnetic field for a configuration with a powered metal electrode and a grounded electrode with a dielectric barrier. It is shown that for this configuration, it is possible to form filamentary structures that appear in the electron density, potential, and light emission, which have properties that scale qualitatively with experiments. For these conditions, the dielectric strength of the boundary is most strongly correlated with the formation of the filaments. Implications of these observations and how they could be used to motivate future experiments are discussed.

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Section: Introductionmentioning

confidence: 99%

Filamentation of capacitively coupled plasmas in large magnetic fields

2019

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“…It is produced in the gas discharge tube with natural gas pressure range that varies from 1 to 100 pa, which is subject to moderate damping [8]. Moreover, magnetized dustyplasma device used to produce a number of the verity of magnetic fields configuration with the help of four independent superconducting coils [12]. Magnetized glow discharge dusty plasma device, RF plasma device, ISS experiment and DC glow discharge devices used for different applications in industries and diagnostic purpose of dusty plasma.…”

Section: Role Of Dust Particles and Applicationsmentioning

confidence: 99%

Numerical Approach to Dynamical Structure Factor of Dusty Plasmas

Shahzad¹,

Shakoori²,

He³

et al. 2019

Plasma Science and Technology - Basic Fundamentals and Modern Applications

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The dynamical structure factor [S(k,ω)] gives the information about static and dynamic properties of complex dusty plasma (CDPs). We have used the equilibrium molecular dynamic (EMD) simulations for the investigation of S(k,ω) of strongly coupled CDPs (SCCDPs). In this work, we have computed all possible values of dynamical density with increasing and decreasing sequences of plasma frequency (ω p) and wave number (k) over a wide range of different combinations of the plasma parameters (κ, Γ). Our new simulation results show that the fluctuation of S(k,ω) increases with increasing Г and it decreases with an increase of κ and N. Moreover, investigation shows that the amplitude of S(k,ω) increases by increasing screening (κ) and wave number (k), and it decreases with increasing Г. Our EMD simulation shows that dynamical density of SCCDPs is slightly dependent on N; however, it is nearly independent of other parameters. The presented results obtained through EMD approach are in reasonable agreement with earlier known results based on different numerical methods and plasma states. It is demonstrated that the presented model is the best tool for estimating the density fluctuation in the SCCDPs over a suitable range of parameters.

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“…The Magnetized Dusty Plasma eXperiment (MDPX) (Thomas et al. 2015) permits dust charging at elevated temperatures and dust generation. The Material Plasma Exposure eXperiment (MPEX) (Rapp et al.…”

Section: Experimental Aspects Of Mpimentioning

confidence: 99%

Existing and new applications of micropellet injection (MPI) in magnetic fusion

et al. 2016

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The intense heat and energetic particle fluxes expected in ITER and future magnetic fusion reactors pose prohibitive problems to the design, selection and maintenance of the first wall and divertor. Micropellet injection (MPI) technologies can offer some innovative solutions to the material and extreme heat challenges. Basic physics of micropellet motion, ablation and interactions with high-temperature plasmas and energetic particles are presented first. We then discuss MPI technology options and applications. In addition to plasma diagnostic applications, controlled injection of micropellets of different sizes, velocities and injection frequencies will offer several possibilities: (1) better assessment of the core plasma cooling due to dust produced in situ; (2) better understanding of the plasma–material interaction physics near the wall; (3) new methods for plasma fuelling and impurity control; and (4) techniques for edge cooling with minimal impact on the plasma core. Dedicated small-scale laboratory experiments will complement major fusion experiments in development and applications of MPI.

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The magnetized dusty plasma experiment (MDPX)

Cited by 48 publications

References 59 publications

Filamentation of capacitively coupled plasmas in large magnetic fields

Filamentation of capacitively coupled plasmas in large magnetic fields

Numerical Approach to Dynamical Structure Factor of Dusty Plasmas

Existing and new applications of micropellet injection (MPI) in magnetic fusion

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