Plasma Crystals - Structure and Dynamics

Piel, A.

doi:10.1585/pfr.4.013

Cited by 8 publications

(3 citation statements)

References 75 publications

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“…The microparticles in size of submicrometers to submillimeters have been called as dust grains or dust particles in the study of interstellar space as early as 1940s. Complex plasma has attracted much attention to the community of plasma physics [1][2][3][4], while recent advances in ultracold plasma [5][6][7][8][9] and cryogenic dusty plasma [10][11][12][13][14][15][16][17] challenge the basic understanding of plasmas. The Debye length, characterized by temperatures of electrons and ions, in a cryogenic plasma becomes much smaller than that in a conventional laboratory plasma and becomes comparable to the size of a dust particle.…”

Section: Introductionmentioning

confidence: 99%

Low-dimensional structures in a complex cryogenic plasma

Ishihara¹

2012

Plasma Phys. Control. Fusion

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Complex cryogenic plasma is theoretically and experimentally studied. In a cryogenic plasma the Debye length becomes smaller and the shielding length becomes comparable to a dust size. Dust charging in a cryogenic plasma is examined in detail by considering the polarization effect on a dust particle due to charged plasma particles. Electrons are found to be attracted to a dust particle when they come closer to a dust particle within a distance from the surface of a dust particle given by r = a((εwhere a is the radius of a spherical dust particle, ε is the dielectric constant of the dust particle, Z d is the charge state of a dust particle and λ D is the Debye length. Microscopic electron collection flux balancing with desorption electron flux determines the dust charge. Negatively charged dust particles form two-dimensional crystal structures and the displacement from the equilibrium positions shows normal modes with a dispersion relation. Experimental study determines dust charges on a cryogenic temperature.

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Section: Introductionmentioning

confidence: 99%

Low-dimensional structures in a complex cryogenic plasma

Ishihara¹

2012

Plasma Phys. Control. Fusion

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“…Fine particles immersed in plasma are charged up negatively, show threedimensional (3D) motion, and form 3D-ordered state, i.e., Coulomb crystal [1][2][3][4][5]. Diagnostic methods for 3D information about the positions of fine particles in a plasma have therefore been widely researched.…”

Section: Introductionmentioning

confidence: 99%

Integral Photography Technique for Three-Dimensional Imaging of Dusty Plasmas

Sanpei¹

2020

Progress in Fine Particle Plasmas

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The integral photography technique has an advantage in which instantaneous three-dimensional (3D) information of objects can be estimated from a singleexposure picture obtained from a single viewing port. Recently, the technique has come into use for scientific research in diverse fields and has been applied to observe fine particles floating in plasma. The principle of integral photography technique and a design of a light-field camera for dusty plasma experiments are reported. The important parameters of the system, dependences of the size of the imaging area, and the spatial resolution on the number of lenses, pitch, and focal length of the lens array are calculated. Designed recording and reconstruction system is tested with target particles located on known positions and found that it works well in the range of dusty plasma experiment. By applying the integral photography technique to the obtained experimental image array, the 3D positions of dust particles floating in an RF plasma are identified.

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“…T hree-dimensional (3D) information about the positions of fine particles in a plasma is important for plasma processes as well as for studying physical processes in Coulomb and real crystals. [1][2][3][4][5] Diagnostic methods for studying such systems have therefore been widely investigated. 3D tomographic reconstructions 6) and stereoscopic techniques 7,8) require two or more detectors; however, the locations and numbers of observation positions are considerably restricted in plasma experiment devices.…”

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confidence: 99%

Design of an open-ended plenoptic camera for three-dimensional imaging of dusty plasmas

Sanpei¹,

Kazuya²,

Hayashi³

2017

Jpn. J. Appl. Phys.

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Herein, the design of a plenoptic imaging system for three-dimensional reconstructions of dusty plasmas using an integral photography technique has been reported. This open-ended system is constructed with a multi-convex lens array and a typical reflex CMOS camera. We validated the design of the reconstruction system using known target particles. Additionally, the system has been applied to observations of fine particles floating in a horizontal, parallel-plate radio-frequency plasma. Furthermore, the system works well in the range of our dusty plasma experiment. We can identify the three-dimensional positions of dust particles from a single-exposure image obtained from one viewing port.

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Plasma Crystals - Structure and Dynamics

Cited by 8 publications

References 75 publications

Low-dimensional structures in a complex cryogenic plasma

Low-dimensional structures in a complex cryogenic plasma

Integral Photography Technique for Three-Dimensional Imaging of Dusty Plasmas

Design of an open-ended plenoptic camera for three-dimensional imaging of dusty plasmas

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