Structure topology of magnetic field close to a null point

Abstract

Magnetic reconnection is a very important and fundamental plasma process in transferring energy from magnetic field into plasma. Previous theory, numerical simulations and observations mostly concentrate on 2-dimensional (2D) model.Configuration of magnetic fields near anull point is re-examined by a topological analysis. The so-called X-and O-type magnetic field respectively occupy their own seat in our classified table. Then the existence of the spiral and node of configuration will be shown by the analysis.