倒V电子沉降通量能谱的理论计算

沿极光区磁力线大约在2000公里到8000公里的高度范围内,存在着一个等离子体湍流和大尺度平行电场的加速区。沿磁力线运动的等离子体片中的电子通过此加速区时,受到等离子体湍流和平行电场的共同作用,形成电子沉降的倒V结构。从一维准线性的动力学方程出发,导出了沉降电子通量的能谱方程,得出了电子通量能谱的理论公式。对等离子体湍流和平行电场对沉降电子能谱的影响作了分析和讨论。本文所提出的理论可以解释目前观测到的某些基本现象。 

THE THEORETICAL CALCULATION OF THE ELECTRON ENERGY SPECTRUM OF AN INVERTED-V EVENT

Observations show that there is a acceleration region on the high-latitude auroral field lines at the altitudes ranging from 2000 km-8000 km.It is pointed out in this paper that plasma sheet electrons are accelerated by the electrostatic waves turbulence and the large scale DCparallel electric field within-the acceleration region to form inverted-Vstructures.The equation of the electron energy spectrum is derived using the quasi-linear kinetic equation,and the solution of the energy spectrum is obtained.The main characters of the electron energy spectrum can be explained by this theory.