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2.0

Jun 29, 2018
06/18

by
Alexander Böbel; Christoph Räth

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A molecular dynamics simulation of the demixing process of a binary complex plasma is analysed and the role of distinct interaction potentials is discussed by using morphological Minkowski tensor analysis of the minority phase domain growth in a demixing simulated binary complex plasma. These Minkowski tensor methods are compared with previous results that utilized a power spectrum method based on the time-dependent average structure factor. It is shown that the Minkowski tensor methods are...

Topics: Data Analysis, Statistics and Probability, Physics, Plasma Physics

Source: http://arxiv.org/abs/1606.08664

2
2.0

Jun 29, 2018
06/18

by
Ingo Laut; Christoph Räth

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The performance of recurrence networks and symbolic networks to detect weak nonlinearities in time series is compared to the nonlinear prediction error. For the synthetic data of the Lorenz system, the network measures show a comparable performance. In the case of relatively short and noisy real-world data from active galactic nuclei, the nonlinear prediction error yields more robust results than the network measures. The tests are based on surrogate data sets. The correlations in the Fourier...

Topics: Chaotic Dynamics, Nonlinear Sciences

Source: http://arxiv.org/abs/1610.01293

2
2.0

Jun 30, 2018
06/18

by
Mierk Schwabe; Sergey Zhdanov; Christoph Räth

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We study a complex plasma under microgravity conditions that is first stabilized with an oscillating electric field. Once the stabilization is stopped, the so-called heartbeat instability develops. We study how the kinetic energy spectrum changes during and after the onset of the instability and compare with the double cascade predicted by Kraichnan and Leith for two-dimensional turbulence. The onset of the instability manifests clearly in the ratio of the reduced rates of cascade of energy and...

Topics: Plasma Physics, Physics

Source: http://arxiv.org/abs/1703.09070

2
2.0

Jun 29, 2018
06/18

by
Ingo Laut; Sergey K. Zhdanov; Christoph Räth; Hubertus M. Thomas; Gregor E. Morfill

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The spectral asymmetry of the wave energy distribution of dust particles during mode-coupling induced melting, observed for the first time in plasma crystals by Cou\"edel et al. [Phys. Rev. E 89, 053108 (2014)], is studied theoretically and by molecular-dynamics simulations. It is shown that an anisotropy of the well confining the microparticles selects the directions of preferred particle motion. The observed differences in intensity of waves of opposed directions is explained by a...

Topics: Physics, Plasma Physics

Source: http://arxiv.org/abs/1601.00895

2
2.0

Jun 30, 2018
06/18

by
Ingo Laut; Christoph Räth; Sergey K. Zhdanov; Vladimir Nosenko; Gregor E. Morfill; Hubertus M. Thomas

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The wake-mediated propulsion of an "extra" particle in a channel of two neighboring rows of a two-dimensional plasma crystal, observed experimentally by Du et al. [Phys. Rev. E 89, 021101(R) (2014)], is explained in simulations and theory. We use the simple model of a pointlike ion wake charge to reproduce this intriguing effect in simulations, allowing for a detailed investigation and a deeper understanding of the underlying dynamics. We show that the nonreciprocity of the particle...

Topics: Plasma Physics, Physics

Source: http://arxiv.org/abs/1701.03270

3
3.0

Jun 30, 2018
06/18

by
Ingo Laut; Christoph Räth; Lisa Wörner; Vladimir Nosenko; Sergey K. Zhdanov; Jan Schablinski; Dietmar Block; Hubertus M. Thomas; Gregor E. Morfill

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Network analysis was used to study the structure and time evolution of driven three-dimensional complex plasma clusters. The clusters were created by suspending micron-size particles in a glass box placed on top of the rf electrode in a capacitively coupled discharge. The particles were highly charged and manipulated by an external electric field that had a constant magnitude and uniformly rotated in the horizontal plane. Depending on the frequency of the applied electric field, the clusters...

Topics: Physics, Physics and Society, Plasma Physics

Source: http://arxiv.org/abs/1401.3530