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Magnetic dynamics of simple collective modes in a two-sphere plasma model
KTH, School of Engineering Sciences (SCI), Mechanics.
2005 (English)In: Physics of Plasmas, ISSN 1070-664X, Vol. 12, no 12Article in journal (Refereed) Published
Abstract [en]

A plasma blob is modeled as consisting of two homogeneous spheres of equal radius and equal but opposite charge densities that can move relative to each other. Relative translational and rotational motion are considered separately. Magnetic effects from the current density caused by the relative motion are included. Magnetic interaction is seen to cause an inductive inertia. In the relative translation case the Coulomb attraction, approximately a linear force for small amplitudes, causes an oscillation. For a large number of particles, the corresponding oscillation frequency will not be the Langmuir plasma frequency, because of the large inductive inertia. For rotation an external magnetic field is included and the energy and diamagnetism of the plasma in the model is calculated. Finally, it is noted how the neglect of resistivity is motivated by the results.

Place, publisher, year, edition, pages
2005. Vol. 12, no 12
Keyword [en]
phase-space energy, charged-particles, diamagnetism, oscillations, rotation
URN: urn:nbn:se:kth:diva-15280DOI: 10.1063/1.2149349ISI: 000234214600001ScopusID: 2-s2.0-29544446898OAI: diva2:333321
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2011-01-19Bibliographically approved

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Essén, Hanno
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