Charge shielding in magnetized plasmas

Wang, Shaojie; Stroth, Ulrich; Van Oost, Guido
November 2010
Physics of Plasmas;Nov2010, Vol. 17 Issue 11, p112101
Academic Journal
The shielding of a charge sheet in a magnetized plasma is investigated by taking account of the diamagnetic drift start-up current in addition to the polarization current. For a charge sheet with an infinitesimal width, the shielding is the same as the conventional Debye shielding if the charge sheet is perpendicular to the magnetic field; the shielding length is [formula] times larger than the conventional one if the charge sheet is parallel to the magnetic field. When the scale length of the charge sheet is comparable or smaller than the ion Larmor radius, the electric field is significantly enhanced within the charge sheet, while far away from the charge sheet, the electric field is shielded to the usual 1/[variant_greek_epsilon]r level (where [variant_greek_epsilon]r is the diamagnetic coefficient of the magnetized plasma).


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