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    Particle-in-cell simulations of collisionless magnetic reconnection with a non-uniform guide field (2016)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2016-03-03
    Description: Results are presented of a first study of collisionless magnetic reconnection starting from a recently found exact nonlinear force-free Vlasov–Maxwell equilibrium. The initial state has a Harris sheet magnetic field profile in one direction and a non-uniform guide field in a second direction, resulting in a spatially constant magnetic field strength as well as a constant initial plasma density and plasma pressure. It is found that the reconnection process initially resembles guide field reconnection, but that a gradual transition to anti-parallel reconnection happens as the system evolves. The time evolution of a number of plasma parameters is investigated, and the results are compared with simulations starting from a Harris sheet equilibrium and a Harris sheet plus constant guide field equilibrium.
    Print ISSN: 1070-664X
    Electronic ISSN: 1089-7674
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 2
    Electronic Resource
    Electronic Resource
    Numerical bifurcation study of a nonlinear current sheet model (1994)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 1 (1994), S. 213-215 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Results are presented of a numerical investigation of the strongly nonlinear bifurcation properties of an isothermal current sheet model which has previously been investigated in the weakly nonlinear regime by analytical methods. With the method used, the linear stability of the bifurcating branch is also checked. The results have applications in the stability of plasma systems with current sheets, e.g., the Earth's magnetotail or solar coronal arcades.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.870554
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Bifurcation of current sheets in plasmas (1986)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 29 (1986), S. 2484-2492 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Bifurcation theory techniques are used for the quantitative investigation of a plane current sheet in plasmas with electric current as the control parameter. The existence of a bifurcation point is shown and the bifurcating solution is calculated. Stability results are achieved for the plane sheet and the bifurcating branches. The results allow conclusions to be drawn about the dynamic evolution of the system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.865542
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  • 4
    Electronic Resource
    Electronic Resource
    The onset of eruptive processes in plasmas. I (1987)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 30 (1987), S. 2720-2728 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Bifurcation theory techniques are employed to compare two apparently similar models for the quasistatic evolution of isothermal current sheet equilibria in cosmic plasma structures. The limitations of the approximation of quasistatic evolution are discussed. In spite of the apparent similarity of the models the qualitative bifurcation behavior is entirely different. It is shown that one model necessarily gives a transition from quasistatic to dynamical evolution of the system, while the other is more likely to describe a slow structural transition to a neighboring stable equilibrium branch. The notion of stability employed here is based on the concept of available free energy. The results shed light on the generic properties of such models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.866037
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