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Träfflista för sökning "WFRF:(Wu Mingyu) srt2:(2010-2014)"

Sökning: WFRF:(Wu Mingyu) > (2010-2014)

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1.
  • Lu, Quanming, et al. (författare)
  • Features of separatrix regions in magnetic reconnection : Comparison of 2-D particle-in-cell simulations and Cluster observations
  • 2010
  • Ingår i: Journal of Geophysical Research. - 0148-0227 .- 2156-2202. ; 115:11
  • Tidskriftsartikel (refereegranskat)abstract
    • In collisionless magnetic reconnection, the in-plane Hall currents are carried mainly by the magnetized electrons. The in-plane Hall currents are directed toward the X line along the magnetic field lines just inside the separatrices and away from the X line along the separatrices. Such a current system leads to the quadrupole out-of-plane magnetic field with the peaks between the regions carrying the in-plane currents. Simultaneously, the electron flow toward the X line along the separatrices causes electron density depletions along the separatrices. In this paper, the features of separatrix regions in magnetic reconnection and the relations between the electron density depletions and the out-of-plane magnetic field are investigated with both two-dimensional particle-in-cell simulations and Cluster observations. We conclude that the electron density depletions are formed because of the magnetic mirror, and they are outside the peaks of the out-of-plane magnetic field. Such a theoretical prediction is confirmed by both simulations and observations.
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2.
  • Wang, Rongsheng, et al. (författare)
  • Observation of double layer in the separatrix region during magnetic reconnection
  • 2014
  • Ingår i: Geophysical Research Letters. - 0094-8276 .- 1944-8007. ; 41:14, s. 4851-4858
  • Tidskriftsartikel (refereegranskat)abstract
    • We present in situ observation of double layer (DL) and associated electron measurement in the subspin time resolution in the separatrix region during reconnection for the first time. The DL is inferred to propagate away from the X line at a velocity of about ion acoustic speed and the parallel electric field carried by the DL can reach -20 mV/m. The electron displays a beam distribution inside the DL and streams toward the X line with a local electron Alfven velocity. A series of electron holes moving toward the X line are observed in the wake of the DL. The identification of multiple similar DLs indicates that they are persistently produced and therefore might play an important role in energy conversion during reconnection. The observation suggests that energy dissipation during reconnection can occur in any region where the DL can reach.
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