Final published version
Research output: Contribution to Journal/Magazine › Journal article
Research output: Contribution to Journal/Magazine › Journal article
}
TY - JOUR
T1 - Screened Coulomb potential in a flowing magnetized plasma
AU - Joost, J. P.
AU - Ludwig, P.
AU - Kählert, H.
AU - Arran, C.
AU - Bonitz, M.
N1 - Publisher Copyright: © 2015 IOP Publishing Ltd.
PY - 2015/2/1
Y1 - 2015/2/1
N2 - 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 (Ludwig et al 2012 New J. Phys. 14 053016). In addition to the magnetic field, our approach accounts for a finite ion temperature as well as ion-neutral collisions. Our recently introduced code 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 M. In the regime of subsonic ion flow (M < 1), a strong magnetization gives rise to a potential distribution that is qualitatively different from the unmagnetized limit, while for M > 1 the magnetic field effectively suppresses the plasma wakefield.
AB - 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 (Ludwig et al 2012 New J. Phys. 14 053016). In addition to the magnetic field, our approach accounts for a finite ion temperature as well as ion-neutral collisions. Our recently introduced code 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 M. In the regime of subsonic ion flow (M < 1), a strong magnetization gives rise to a potential distribution that is qualitatively different from the unmagnetized limit, while for M > 1 the magnetic field effectively suppresses the plasma wakefield.
KW - Dusty plasma
KW - Dynamical screening
KW - Ion focus
KW - Linear response
KW - Magnetic field
KW - Multi-component plasma
KW - Plasma wakes
UR - http://www.scopus.com/inward/record.url?scp=84921690151&partnerID=8YFLogxK
U2 - 10.1088/0741-3335/57/2/025004
DO - 10.1088/0741-3335/57/2/025004
M3 - Journal article
AN - SCOPUS:84921690151
VL - 57
JO - Plasma Physics and Controlled Fusion
JF - Plasma Physics and Controlled Fusion
SN - 0741-3335
IS - 2
M1 - 025004
ER -