Monthly Archives: November 2014

Kinetic origin of grain boundary migration, grain coalescence, and defect reduction in the crystallization of quenched two-dimensional Yukawa liquids

Author(s): Meng-Chun Chen, Chi Yang, and Lin I

The kinetic origin of grain boundary migration, grain coalescence, and defect reduction in the crystallization of quenched two-dimensional Yukawa liquids are numerically investigated. It is found that, in grain coalescence, stick-slip cracking the region in front of the grain boundary into smaller s...

[Phys. Rev. E 90, 050401] Published Wed Nov 05, 2014

Effect of argon addition on plasma parameters and dust charging in hydrogen plasma

Experimental results on effect of adding argon gas to hydrogen plasma in a multi-cusp dusty plasma device are reported. Addition of argon modifies plasma density, electron temperature, degree of hydrogen dissociation, dust current as well as dust charge. From the dust charging profile, it is observed that the dust current and dust charge decrease significantly up to 40% addition of argon flow rate in hydrogen plasma. But beyond 40% of argon flow rate, the changes in dust current and dust charge are insignificant. Results show that the addition of argon to hydrogen plasma in a dusty plasma device can be used as a tool to control the dust charging in a low pressure dusty plasma.

Soft mean spherical approximation for dusty plasma liquids: One-component Yukawa systems with plasma shielding

Author(s): P. Tolias, S. Ratynskaia, and U. de Angelis

The structure and thermodynamics of strongly coupled dusty plasmas are investigated with the soft mean spherical approximation. This integral theory approach is analytically solvable for Yukawa pair interactions yielding a closed-form solution for the direct correlation function. The pair correlatio...

[Phys. Rev. E 90, 053101] Published Mon Nov 03, 2014