A magnetic sail is spacecraft propulsion that produces an artificial magnetosphere to block solar wind particles and thus impart momentum to accelerate a spacecraft. In the present study, the authors conducted two-dimensional particle-in-cell simulations on small-scale magnetospheres to investigate thrust characteristics of a magnetic sail and its derivative, magnetoplasma sail, in which the magnetosphere is inflated by an additional plasma injection. As a result, the authors found that the electron Larmor motion and the charge separation become significant on such a small-scale magnetosphere and the thrust of the magnetic sail is affected by the cross-sectional size of the charge-separated magnetosphere. The authors also reveal that the plasma injection, on the condition that the kinetic energy of plasma is smaller than the local magnetic field energy ( β 10 3 ), can significantly inflate the magnetosphere by inducing diamagnetic current in the same direction as the onboard coil current. As a result, the magnetoplasma sail thrust is increased effectively by an additional plasma injection: the magnetoplasma sail thrust ( 15 μ N / m ) becomes up to 7.5 times larger than the original thrust of the magnetic sail ( 2.0 μ N / m ). In addition, they found that the thrust gain of the magnetoplasma sail, defined as “magnetoplasma sail thrust/(magnetic sail thrust + plasma injection thrust)” becomes up to 2.2.


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    Title :

    Two-Dimensional Particle-In-Cell Simulation of Magnetic Sails


    Contributors:

    Published in:

    Publication date :

    2013-08-26


    Size :

    13 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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