Coronal transient from drift electric field

Summary form only given, as follows. Without flare in company with, in the region of plasma turbulence the coronal transient can also be created by an electric field which arises from the transient magnetic field. In the solar active region, the transient magnetic field B with time can induct a vortex electric field E/sub c/. The E/sub c/ may create a drift electric field E/sub v/ of E/sub c//spl times/B. The E/sub c/ and E/sub v/ interaction will cause unlimited growth of drift instability and lead to strong turbulence of ion-acoustic waves. When plasma turbulence is fully developed and a "runaway" electron beam is formed, in the turbulent region, Coulomb collision damping and Landau collisionless damping can be neglected. In this case, the acceleration of an electric field becomes effective under certain conditions, the transient magnetic energy is effectively transformed into transient kinetic energy by plasma turbulence and electric field acceleration.