Preliminary characteristics of magnetic field and plasma performance in the Magnetized Dusty Plasma Experiment (MDPX)

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

doi:10.1017/s0022377814000270

Cited by 19 publications

(8 citation statements)

References 14 publications

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“…This device, known as the Magnetized Dusty Plasma EXperiment (MDPX) was commissioned in May 2014, and is operated as a user facility for the international dusty plasma community. 38 The MDPX has been described in detail in a number of publications [178][179][180][181][182] and is shown schematically in Figure 16. The central component of the device is the superconducting magnet system composed of two sets of coils in separate cryostats, capable of producing a uniform magnetic field up to 4 T. The magnet system was designed to have a large open bore (50 cm) to accommodate an octagonal vacuum vessel with large ports for diagnostic access.…”

Section: The Magnetized Dusty Plasma Experiments (Mdpx)mentioning

confidence: 99%

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Dusty plasmas: from Saturn’s rings to semiconductor processing devices

Merlino

2021

Advances in Physics: X

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Dusty plasmas are plasmas containing solid particles in the size range of about 10 nm-10 μm. The particles acquire an electrical charge by collecting electrons and ions from the plasma, or by photo-electron emission if they are exposed to UV radiation. The charged dust particles interact with the electrons and ions, forming a multi-component plasma. Dusty plasmas occur in a number of natural environments, including planetary rings, comet tails, and solar nebulae; as well as in technological devices used to manufacture semiconductor chips, and in magnetic fusion devices. This article focuses on the physics underlying dusty plasmas, which are studied by plasma physicists, aeronomists, space physicists, and astrophysicists. The article begins with an introduction explaining what we mean by a dusty plasma, where they are found, and a summary of their basic properties. The article then presents the fundamental physics of dust charging, forces on dust particles, a description of devices used to produce dusty plasmas, strongly coupled dusty plasmas, collective phenomenon (waves) in dusty plasmas, magnetized dusty plasmas, and the emerging technologies based on dusty plasmas. It concludes with a few perspective comments on how the field has developed historically and the prospects for future advances.

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Section: The Magnetized Dusty Plasma Experiments (Mdpx)mentioning

confidence: 99%

“…Figure16. Schematic drawing of the Magnetized Dusty Plasma Experiment (MDPX) at Auburn University[178][179][180][181][182]. The device consists of a 4 superconducting magnet coils capable of a maximum field strength of 4 T, and an RF parallel plate plasma discharge.…”

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confidence: 99%

Dusty plasmas: from Saturn’s rings to semiconductor processing devices

Merlino

2021

Advances in Physics: X

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“…Dust grains are assigned a charge number Z d = −100. The mass is computed considering spherical grains with a diameter of 100 nm and a density 1.05 g/cm 3 (typical of polymeric particles). The time step is 0.15 µs and the total simulation time is of a few milliseconds (sufficient to follow the complete evolution of the diocotron instability).…”

Section: Numerical Investigationsmentioning

confidence: 99%

“…The dusty plasmas studied in the laboratory are typically characterized by conditions of global quasi-neutrality and weak magnetization of the dust component. Only in a limited number of experiments, regimes of partial or complete magnetization of the dust populations have been investigated [2,3].…”

Section: Introductionmentioning

confidence: 99%

Effects of dust contamination on the transverse dynamics of a magnetized electron plasma

Romé¹,

Cavaliere²,

Cavenago³

et al. 2015

AIP Conference Proceedings

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Abstract. Complex (dusty) plasmas are characterized by the presence of a fraction of micrometric or sub-micrometric particles which may collect a surface charge up to the order of a few thousand electron charges. The dusty plasmas studied in the experiments generally satisfy a global neutrality condition. By contrast, we present here the investigation of a magnetized nonneutral plasma, i.e., a plasma with a single sign of charge (e.g. electrons) confined in a Penning-Malmberg trap, contaminated by a dust population. We simulate the two-dimensional transverse dynamics of this multi-component plasma with a particle-in-cell code implementing a mass-less fluid (drift-Poisson) approximation for the electrons and a kinetic description for the dust component (including gravity). Simulations with different initial dust distributions and densities have been performed in order to investigate the influence of the dust on the development of the diocotron instability in the electron plasma. In particular, the early stage of the growth of the diocotron modes has been analyzed by Fourier decomposition.

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“…In a device such as MDPX, there can be a component of electric field perpendicular to the magnetic field , which, for example, electrostatically confines the dust (see Thomas et al. 2014). Motivated by this, we consider a possible instability that may occur under conditions where the ions (and electrons) are magnetized and acquire drifts relative to the dust which is unmagnetized.…”

Section: Introductionmentioning

confidence: 99%

Simulations of a low frequency beam-cyclotron instability in a dusty plasma

2018

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The nonlinear development of a low frequency beam-cyclotron instability in a collisional plasma composed of magnetized ions and electrons and unmagnetized, negatively charged dust is investigated using one-dimensional particle-in-cell simulations. Collisions of charged particles with neutrals are taken into account via a Langevin operator. The instability, which is driven by an ion $\boldsymbol{E}\times \boldsymbol{B}$ drift, excites a quasi-discrete wavenumber spectrum of waves that propagate perpendicular to the magnetic field with frequency of the order of the dust plasma frequency. In the linear regime, the unstable wavelengths are of the order of the ion gyroradius. As the wave energy density increases, the dominant modes shift to longer wavelengths, suggesting a transition to a Hall-current-type instability. Parameters are considered that reflect the ordering of plasma and dust quantities in laboratory dusty plasmas with high magnetic field. Comparison with the nonlinear development of this beam cyclotron instability in a collisionless dusty plasma is also briefly discussed.

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Preliminary characteristics of magnetic field and plasma performance in the Magnetized Dusty Plasma Experiment (MDPX)

Cited by 19 publications

References 14 publications

Dusty plasmas: from Saturn’s rings to semiconductor processing devices

Dusty plasmas: from Saturn’s rings to semiconductor processing devices

Effects of dust contamination on the transverse dynamics of a magnetized electron plasma

Simulations of a low frequency beam-cyclotron instability in a dusty plasma

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