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    • Keywords


      Plasmoids; diffusion; neutral point instability

    • Abstract


      In this paper neutral point (coalescence) instability (NPI) of plasmoids (PMD) associated with tailward streaming O+, H+ and e particles and diffusion region (spatial extent and particle life time) are studied. Also, radial and pitch angle diffusion studies have been carried out in the near-earth region (10 and 11 RE during substorm onset. Our study revealed that coalescence instability is favoured by a heavier ion like O+ and the time required for a heavier ion to reach from one X point to an adjacent X point is minimum. Near an X type neutral line (diffusion region) ions spend a fairly long time and gain a significant amount of energy. Radial and pitch angle diffusion studies showed that higher energy particles are largely confined near the reconnection region (near-earth region) and lower energy particles are rapidly depleted from the near-earth region during substorm onset.

    • Author Affiliations


      M S Sindhu1 G Renuka1 C Venugopal1 2

      1. Department of Physics, University of Kerala, Kariavattom - 695 581, India
      2. School of Pure and Applied Physics, M G University, Kottayam, India
    • Dates

  • Journal of Earth System Science | News

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      Posted on July 25, 2019

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