Charge shielding in magnetized plasmas

Shaojie Wang; Ulrich Stroth; Guido Van Oost

doi:10.1063/1.3497274

Charge shielding in magnetized plasmas

Shaojie Wang, Ulrich Stroth, Guido Van Oost

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

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 √2 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/ ε_r level (where ε_r is the diamagnetic coefficient of the magnetized plasma).

Original language	English
Article number	112101
Journal	Physics of Plasmas
Volume	17
Issue number	11
DOIs	https://doi.org/10.1063/1.3497274
State	Published - Nov 2010
Externally published	Yes

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10.1063/1.3497274

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abstract = "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 √2 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/ εr level (where εr is the diamagnetic coefficient of the magnetized plasma).",

author = "Shaojie Wang and Ulrich Stroth and {Van Oost}, Guido",

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N2 - 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 √2 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/ εr level (where εr is the diamagnetic coefficient of the magnetized plasma).

AB - 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 √2 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/ εr level (where εr is the diamagnetic coefficient of the magnetized plasma).

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Charge shielding in magnetized plasmas

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