Screened Coulomb potential in a flowing magnetized plasma
Abstract
The electrostatic potential of a moving dust grain in a complex plasma with magnetized ions is computed using linear response theory, thereby extending our previous work for unmagnetized plasmas [P. Ludwig et al., New J. Phys. 14, 053016 (2012)]. In addition to the magnetic field, our approach accounts for a finite ion temperature as well as ion-neutral collisions. Our recently introduced code \texttt{Kielstream} is used for an efficient calculation of the dust potential. Increasing the magnetization of the ions, we find that the shape of the potential crucially depends on the Mach number . In the regime of subsonic ion flow (), a strong magnetization gives rise to a potential distribution that is qualitatively different from the unmagnetized limit, while for the magnetic field effectively suppresses the plasma wakefield.
Keywords
Cite
@article{arxiv.1407.1645,
title = {Screened Coulomb potential in a flowing magnetized plasma},
author = {Jan-Philip Joost and Patrick Ludwig and Hanno Kählert and Christopher Arran and Michael Bonitz},
journal= {arXiv preprint arXiv:1407.1645},
year = {2015}
}