Conditions for plasmoid penetration across abrupt magnetic barriers
2005 (English)In: Physics of Plasmas, ISSN 1070-664X, Vol. 12, no 1Article in journal (Refereed) Published
The penetration of plasma clouds, or plasmoids, across abrupt magnetic barriers (of the scale less than a few ion gyro radii, using the plasmoid directed velocity) is studied. The insight gained earlier, from detailed experimental and computer simulation investigations of a case study, is generalized into other parameter regimes. It is concluded for what parameters a plasi-noid should be expected to penetrate the magnetic barrier through self-polarization, penetrate through magnetic expulsion, or be rejected from the barrier. The scaling parameters are n(e), upsilon(o), B-perpendicular to, m(i), T-i, and the width w of the plasmoid. The scaling is based on a model for strongly driven, nonlinear magnetic field diffusion into a plasma which is a generalization of the earlier laboratory findings. The results are applied to experiments earlier reported in the literature, and also to the proposed application of impulsive penetration of plasmoids from the solar wind into the Earth's magnetosphere.
Place, publisher, year, edition, pages
2005. Vol. 12, no 1
ion-beam transverse, field, propagation, simulations, instability
IdentifiersURN: urn:nbn:se:kth:diva-14517DOI: 10.1063/1.1812277ISI: 000226864500018ScopusID: 2-s2.0-20444444310OAI: oai:DiVA.org:kth-14517DiVA: diva2:332558
QC 201005252010-08-052010-08-05Bibliographically approved