A self-consistent analytical model for the upstream magnetic-field and ion-beam properties in Weibel-mediated collisionless shocks

Abstract : A theoretical and numerical analysis is carried out for turbulent collisionless shocks mediated by the ion-Weibel instability during high-velocity plasma collisions. We develop a simple model based on the coalescence dynamics of the ion current filaments, which predicts the spatio-temporal evolution of the magnetic fluctuations formed in the upstream plasma region. From comparison with particle-in-cell simulations, our model is shown to correctly capture the magnetic-field and ion-beam properties during the early-time shock propagation.
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Physics of Plasmas, American Institute of Physics, 2017, 24 (4), pp.41409. 〈10.1063/1.4979187〉
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C. Ruyer, L. Gremillet, G. Bonnaud, C. Riconda. A self-consistent analytical model for the upstream magnetic-field and ion-beam properties in Weibel-mediated collisionless shocks. Physics of Plasmas, American Institute of Physics, 2017, 24 (4), pp.41409. 〈10.1063/1.4979187〉. 〈hal-01542835〉

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