Monthly Archives: January 2014

Head-on collision of dust-acoustic solitons in a strongly coupled dusty plasma

Author(s): S. K. Sharma, A. Boruah, and H. Bailung

The collision between two counterpropagating dust acoustic solitary waves in a strongly coupled dusty plasma has been observed. The measured velocity and width of the solitary wave agree with the solution of the Korteweg–de Vries equation derived by using the generalized hydrodynamic model. The two ...

[Phys. Rev. E 89, 013110] Published Fri Jan 31, 2014

Nonequilibrium finite dust clusters: Connecting normal modes and wakefields

Author(s): André Melzer, André Schella, and Matthias Mulsow

The dynamic properties of finite three-dimensional dust clusters in a dusty plasma under the influence of an ion focus are studied by normal modes. The mode analysis has been extended to account for the ion focus using the point-charge model for the horizontal interaction of the dust particles. From...

[Phys. Rev. E 89, 013109] Published Thu Jan 30, 2014

Dynamics of two-dimensional one-component and binary Yukawa systems in a magnetic field

Author(s): T. Ott, H. Löwen, and M. Bonitz

We consider two-dimensional Yukawa systems in a perpendicular magnetic field. Computer simulations of both one-component and binary systems are used to explore the equilibrium particle dynamics in the fluid state. The mobility is found to scale with the inverse of the magnetic field strength (Bohm d...

[Phys. Rev. E 89, 013105] Published Thu Jan 16, 2014

Effect of strong wakes on waves in two-dimensional plasma crystals

Author(s): T. B. Röcker, A. V. Ivlev, S. K. Zhdanov, and G. E. Morfill

We study the effects of the particle-wake interactions on the dispersion and polarization of dust lattice wave modes in two-dimensional plasma crystals. Most notably, the wake-induced coupling between the modes causes the branches to “attract” each other, and their polarizations become elliptical. U...

[Phys. Rev. E 89, 013104] Published Wed Jan 15, 2014

Effect of strong coupling on the dust acoustic instability

Author(s): M. Rosenberg, G. J. Kalman, P. Hartmann, and J. Goree

In a plasma containing charged dust grains, the dust acoustic instability (DAI) can be driven by ions streaming through the dust with speed less than the ion thermal speed. When the dust is strongly coupled in the liquid phase, the dispersion relation of the dust acoustic modes changes in a way that...

[Phys. Rev. E 89, 013103] Published Mon Jan 13, 2014

Transverse current fluctuations in the Yukawa one-component plasma

Author(s): James P. Mithen

Using numerical simulations, we investigate the wave number and frequency dependent transverse current correlation function CT(k,ω) of a single-component fluid with Yukawa interaction potential, also known as the Yukawa one-component plasma. The transverse current correlation function is an importan...

[Phys. Rev. E 89, 013101] Published Tue Jan 07, 2014