N_2介质阻挡放电中有效电场的光谱测定

Determination of Net Electric Field in Dielectric Barrier Discharge in N_2 by Relative Spectrum Line Intensity

采用蒙特卡罗方法,模拟了N2非平衡态直流放电等离子体过程。计算了不同E/N条件下电子在氮气中的漂移速度,结果与实验数据符合得很好。模拟了电子激发态粒子数随E/N的变化关系。提出在介质阻挡放电研究和应用中,通过监测两条紫外谱线145和201 nm强度之比来监测有效电场的方法。

The process of N2 discharge in direct current electric field is simulated by Monte Carlo method. The electron drift velocity as a function of E/N is given, which is in good agreement with experimental result. The variations of the number density of electronic excitation states of N2（ A^3∑u^＋ and a^1Ⅱg ） with the reduced field E/N are simulated. A method is proposed to determine the net reduced electric field in dielectric barrier discharge by monitoring the relative intensity of spectrum line 145 um and spectrum line 201 nm.