Cluster Data Analysis Of Asymmetric Magnetic Reconnection And A Source Model Of Cosmic Rays

In this thesis, with ESA's Cluster data, we analyze the little scale structures of magnetopause boundary layers and study a possible source model of cosmic rays .Chen's numerical simulation research finds that when the transverse flow is not homogeneous, magnetic field lines are to be forced bent and reconnection occurs in formerly identical magnetic field directed region during the impacting period, and a new "Reverse K" pattern reconnection configuration is formed in the current sheet region. On the normal vector, the magnetic field has multi-polar structure.Magnetopause boundary layer is always impacted by the solar wind from the bow shock. So, we can suppose on the local normal vector of magnetopause there are velocity shear, and the magnetic field also has multi-polar structure similar to the numerical simulation. Using the magnetic field data detected by FGM on CLUSTER, we determine the normal vector when Cluster satellites past through the magnetopause region on Feb 20, 2001 with Minimum Variance analysis method. We found on the local normal vector, the detected magnetic field has multi-polar structure. Also using proton bulk velocity detected by CIS, we calculated the velocity shear on the normal vector and it is about tens of kilometer per second.Up to now, there are not definite source models of cosmic rays though they come from the Sun, supernovas' explosion, the white dwarfs and pulsars,et al.Because of gravity, the white dwarfs and pulsars collapse to black holes. There is a radiation mechanics at the event horizons of black hole. It is that at the event horizons of a black hole, there are vacuum particle pairs and the negative particles is absorbed by the black hole as the positive one runs away. This radiation possibly is a sourceof cosmic rays. Using DIRAC equation near black-holes'event horizon, we calculate the temperatures of Vaidya-Bonner-de Sitter black hole and its radiation spectrum. It is shown that near the event horizons, there are Dirac particles. At the same time, we study other thermodynamic charaters of the black hole. Via the improved brick-wall model proposed by t' Hooft in 1985, we calculate the entropy of charged non-stationary Vaidya-Bonner black hole and conclude that the entropy is proportional to its horizons.