电子等离子体的束缚和热平衡必要条件

Necessary Conditions of Thermal Equilibrium for Confined Electron Plasma

电子等离子体在静磁场和静电场的束缚下 ,可以达到热平衡态 ,其必要条件是电子等离子体的密度分布要满足泊松方程 ,且等离子体内的磁力线为等势线 .同时 ,电子等离子具有柱体的形状 ,在任何部位不能扩展出它所在的磁通管 .当磁场有不均匀性时 ,电子等离子体是不能达到热平衡态的 。

An electron plasma may be in thermal equilibrium state under the confinement by electric and magnetic fields. The necessary conditions for the equilibrium state of the electron plasma require that the eleetion density distribution function of the plasma satisfies the Poissons equation, and that magnetic field lines inside the plasma are equipotentials. The plasma has a cylindrical shap, which has no part expanding from the magnetic flux tube. When the magnetic field is nonunform, it is shown that the electron plasma has no equilibrium state, the all electrons are eventually lost to the wall.