解析式直流辉光放电等离子体理论模型的改进

Analytic model modification for DC glow discharge plasma

对作者前期建立的自洽、解析式直流辉光放电等离子体理论模型进行了改进。考虑到电子能量分布，认为电子碰撞电离速率系数ｆ取决于电子的迁移速度ＶＥ和扩散速度ＶＤ，而不象以前假设电离速率系数ｆ为一常数。另外，不再将形式为（Ｃ１ｃｏｓｍｚ＋Ｃ２ｓｉｎｍｚ）的通解简化为形式为Ｃ（ｃｏｓｍｚ＋ｓｉｎｍｚ）的特解，改进后的理论模型仍为自洽的解析式理论模型，它的适用范围更广，与实验结果更为接近。

In this presentation,the modification of the analytic model developed previously has been carried out with the consideration of electron energy distribution,i. e. the ionization coefficient f of electron collision with neutral moleculars is contributed from both of electron drift velocity and diffusion velocity while it was assumed to be a constant in the previous model. Another improvement is that the general solution like (C1 cosmz+C2sinmz) has been also taken in the present model while the particular solution like C(cosmz+sinmz)was employed in previous one. The modified model is also in self--consistent and analytic forms and the agreements between the theory and the experimental results are much better than before.