论文部分内容阅读
众所周知,一般称等离子体为物质第四态。气体放电等离子体可以定义为已电离的气体,它是中性气体分子、原子、离子、电子和光子的集合体,其总电和等于零。等离子体各组份之间有重要的相互作用,如电子和中性气体分子原子之间的碰撞,电子和离子之间的库仑作用。前者能引起电离,后者则引起等离子体振荡和(或)复合,通常不产生辐射。电子温度及电子数密度是等离子体的最基本的两个参量。前者表示等离子体中电子无规运动能量的大小,后者表示单位体积中带电粒子数。呈电中性的均匀等离子体,如果由于偶然
As we all know, the plasma is generally called the fourth state of matter. Gas discharge plasma can be defined as ionized gas, it is a collection of neutral gas molecules, atoms, ions, electrons and photons, the total electricity and equal to zero. There are important interactions between the various components of the plasma, such as collisions between atoms of electrons and neutral gases, and coulombs between electrons and ions. The former can cause ionization while the latter causes plasma oscillations and / or recombination, usually without radiation. Electron temperature and electron density are the two most basic parameters of the plasma. The former indicates the magnitude of the electron’s random kinetic energy in the plasma and the latter indicates the number of charged particles in the unit volume. Neutral plasma homogeneous plasma, if by chance