Pulse of the Hall term compared to the frozen-in term and the triggering mechanism of magnetic reconnection at the reconnection point

 The Hall effect closely relates to the decoupling between the motion of ions and that of electrons during magnetic reconnection. It is the key to understand the triggering mechanism of magnetic reconnection. In our previous research result, the energy cascade at the reconnection point is first found (Huang et al. 2018, GRL). It leads to the pulse of the Hall term compared to the frozen-in term at the reconnection point, explaining well the motion decoupling between ions and electrons . In order to understand better the energy cascade at the reconnection point, we will study further the physical process which acts between the energy cascade at the reconnection point and the motion of plasma waves in the reconnection region. The wave-number distribution of both magnetic field and electric field is investigated by use of simulation. The role of Landau damping of KAW in the reconnection region is discussed in detail based on the simulation result. It is also provide a physical mechanism to understand the resistivity which is essential for the colisionless reconnection.