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    Tangential deflection and formation of counterstreaming flows at the impact of a plasma jet on a tangential discontinuity

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    Authors
    Voitcu, G.
    Echim, M.
    Discipline
    Physical sciences
    Subject
    Electric fields
    Magnetopause
    Particle beam dynamics
    Plasma jets
    Polarization
    Discontinuity surfaces
    Energy dependent
    Impulsive penetration
    Interplanetary magnetic fields
    Magnetosheaths
    Particle-in-cell simulations
    Tangential discontinuities
    Three dimensional particle-in-cell simulations
    Plasma simulation
    Audience
    Scientific
    Date
    2017
    Metadata
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    Description
    In this letter we report three-dimensional particle-in-cell simulations of the interaction between a nonpenetrable magnetosheath jet and the magnetopause, for northward interplanetary magnetic field. The magnetopause is modeled as a tangential discontinuity with no magnetic shear. We investigate the deflection of the plasma jet in the direction tangential to the magnetopause. We find that as the frontal edge of the jet interacts with the magnetopause, the electrons and ions are scattered in opposite directions, tangential to the magnetopause, by the energy-dependent gradient-B drift. This effect is more effective on the nonthermal particles that tend to accumulate at the two sides of the jet and sustain a polarization electric field in the direction normal to the discontinuity surface. The electric drift of the bulk of particles under the action of this polarization electric field explains the deflection and counterstreaming at the impact of the plasma jet on the tangential discontinuity.
    Citation
    Voitcu, G.; Echim, M. (2017). Tangential deflection and formation of counterstreaming flows at the impact of a plasma jet on a tangential discontinuity. , Geophysical Research Letters, Vol. 44, Issue 12, 5920-5927, DOI: 10.1002/2017GL073763.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/5946
    doi: http://dx.doi.org/10.1002/2017GL073763
    scopus: 2-s2.0-85021189520
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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