Evolution of Plasmoid-Chain in Poynting-Dominates Plasma

We present our recent results of the evolution of the plasmoid-chain in a Poynting dom- inated plasma. We model the relativistic current sheet with cold background plasma using the relativistic resistive magnetohydrodynamic approximation, and solve its tem- poral evolution numerically. Numerical results show that the initially induced plasmoid triggers a secondary tearing instability. We find the plasmoid-chain greatly enhances the reconnection rate, which becomes independent of the Lundquist number, when this exceeds a critical value. Since magnetic reconnection is expected to play an important role in various high energy astrophysical phenomena, our results can be used for explain- ing the physical mechanism of the