Volumetric measurements of a spatially growing dust acoustic wave

Williams, Jeremiah

doi:10.1063/1.4766813

Cited by 11 publications

(11 citation statements)

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“…7 There are also three-dimensional PIV approaches that are able to perform three-dimensional studies on dust density waves. [8][9][10][11] The usual stereoscopic PIV allows to obtain the three-dimensional velocity vectors in a two-dimensional spatial plane (2D3C).…”

Section: Introductionmentioning

confidence: 99%

Stereoscopy of dust density waves under microgravity: Velocity distributions and phase-resolved single-particle analysis

et al. 2014

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Experiments on dust-density waves have been performed in dusty plasmas under the microgravity conditions of parabolic flights. Three-dimensional measurements of a dust density wave on a single particle level are presented. The dust particles have been tracked for many oscillation periods. A Hilbert analysis is applied to obtain trajectory parameters such as oscillation amplitude and threedimensional velocity amplitude. While the transverse motion is found to be thermal, the velocity distribution in wave propagation direction can be explained by harmonic oscillations with added Gaussian (thermal) noise. Additionally, it is shown that the wave properties can be reconstructed by means of a pseudo-stroboscopic approach. Finally, the energy dissipation mechanism from the kinetic oscillation energy to thermal motion is discussed and presented using phase-resolved analysis. V C 2014 AIP Publishing LLC. [http://dx.

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Section: Introductionmentioning

confidence: 99%

Stereoscopy of dust density waves under microgravity: Velocity distributions and phase-resolved single-particle analysis

et al. 2014

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“…This technique has been used to gain insight into the three-dimensional transport within a weakly coupled dusty plasma (Williams 2011), the three-dimensional properties of the dust acoustic wave (Williams 2012) and the thermal state of weakly coupled dusty plasma systems (Williams 2011). A key advantage to this approach is that it provides a much more complete measurement of the transport properties over an extended volume.…”

Section: Stereoscopic Pivmentioning

confidence: 99%

“…The loss of the higher frequency information that is observed in the dispersion data found from the velocity data is due to the suppression of the nonlinearity of the wave that occurs when performing the PIV analysis, as seen in figure 5(b,c). Figure 7 shows a measurement of the volumetric structure of the naturally occurring dust acoustic wave in a dust cloud composed of 1.98 µm diameter melamine microspheres suspended in an argon dc glow discharge plasma that was made using the tomographic PIV technique (Williams 2012). In this measurement, a 3 mm thick slice from the centre of the dust cloud was illuminated and the illuminated volume was reconstructed using five iterations of the MART technique.…”

Section: Representative Measurementsmentioning

confidence: 99%

“…This technique has provided significant insight into a range of phenomena involving the strength of the neutral drag force (Thomas Jr & Williams 2005), the spatial structure and thermal properties of the dust acoustic wave (Thomas Jr 2006, 2010Fisher & Thomas Jr 2010) and the thermal state of weakly coupled dusty plasma systems (Williams & Thomas Jr 2007;Fisher & Thomas Jr 2011, 2012. However, these measurements of the three-dimensional transport are restricted to a thin slice of the dusty plasma system and may not fully capture the true three-dimensional motion if particles leave the laser sheet during the duration of the measurement, t PIV .…”

Section: Stereoscopic Pivmentioning

confidence: 99%

“…This mapping function has been benchmarked using both simulated (Thomas Jr, Williams & Räth 2010) and experimental data (see supplementary material available at http://dx.doi.org/10.1017/S0022377816000507), allowing one to recover the underlying velocity distribution function from what is measured using PIV techniques. Once the phase space distribution function has been reconstructed, it can then be modelled using an appropriate distribution function, such as the tri-normal distribution (Fisher & Thomas Jr 2011, 2012, and moments can be taken to find the thermal properties of the dust cloud. Results from this analysis approach applied to tomographic PIV measurements of a dust cloud composed of 1.98 µm diameter melamine microspheres suspended in an argon dc glow discharge plasma are seen in figure 8.…”

Section: Representative Measurementsmentioning

confidence: 99%

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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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Latest Results on Complex Plasmas with the PK-3 Plus Laboratory on Board the International Space Station

Schwabe

Huber

et al. 2018

Microgravity Sci. Technol.

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Complex plasmas are low temperature plasmas 1 that contain microparticles in addition to ions, electrons, and 2 neutral particles. The microparticles acquire high charges, 3 interact with each other and can be considered as model par-4 ticles for effects in classical condensed matter systems, such 5 as crystallization and fluid dynamics. In contrast to atoms in 6 ordinary systems, their movement can be traced on the most 7 basic level, that of individual particles. In order to avoid dis-8 turbances caused by gravity, experiments on complex plas-9 mas are often performed under microgravity conditions. The 10 PK-3 Plus Laboratory was operated on board the Interna-11 tional Space Station from 2006 -2013. Its heart consisted of 12 a capacitively coupled radio-frequency plasma chamber. Mi-13 croparticles were inserted into the low-temperature plasma, 14 forming large, homogeneous complex plasma clouds. Here, 15 we review the results obtained with recent analyses of PK-3 16 Plus data: We study the formation of crystallization fronts, 17 as well as the microparticle motion in, and structure of crys-18 talline complex plasmas. We investigate fluid effects such as 19 wave transmission across an interface, and the development 20 of the energy spectra during the onset of turbulent micropar-ticle movement. We explore how abnormal particles move 22 through, and how macroscopic spheres interact with the mi-23 croparticle cloud. These examples demonstrate the versatil-24 ity of the PK-3 Plus Laboratory. 25 28 53 Weightless complex plasmas show a wealth of interest-1 ing phenomena such as relatively stress-free crystallization 2 [9,14], waves [15, 16], lane formation [17, 18], electrorhe-3 ology and string formation [19-22], cavitation and Mach 4 cones [23-25], etc. Laboratories to study complex plasmas 5 were already used on board the Mir space station [26], and 6 were among the first scientific experiments on board the In-7 ternational Space Station (ISS) [9]. The Russian-German 8 PK-3 Plus Laboratory was operated on the ISS from 2006 9 -2013 [27-29], and the state-of-the-art Russian-European 10 PK-4 Laboratory is currently on board [30, 31]. Data analy-11 sis from PK-3 Plus is still on-going, and here we will review 12 some of the latest results. 13 Fig. 1 shows a sketch of the heart of the PK-3 Plus Lab-14 oratory, the plasma chamber. A plasma was produced in a 15 vacuum chamber filled with argon or neon gas at pressures 16 between 5 and 255 Pa by applying a radio-frequency elec-17 tric field to two parallel electrodes with a distance of 3 cm 18 and a radius of 6 cm. The electrodes were surrounded by 19 1.5 cm wide grounded guard rings in which particle dis-20 pensers were embedded. The dispensers were shaken elec-21 tromagnetically in order to inject monodisperse silica and 22 78

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Volumetric measurements of a spatially growing dust acoustic wave

Cited by 11 publications

References 31 publications

Stereoscopy of dust density waves under microgravity: Velocity distributions and phase-resolved single-particle analysis

Stereoscopy of dust density waves under microgravity: Velocity distributions and phase-resolved single-particle analysis

Application of particle image velocimetry to dusty plasma systems

Latest Results on Complex Plasmas with the PK-3 Plus Laboratory on Board the International Space Station

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