中等pd值介质阻挡放电中等离子体温度研究

近大气压条件下，在介质阻挡放电系统中得到了氩气和空气混合气体在300～800 nm范围内的发射光谱，研究了中等pd值(约6.4×103 Pa·cm) 氩气和空气混合气体中电子激发温度与分子振动温度。实验选用两条ArⅠ谱线763.51 nm(2P₆→1S₅)与772.42 nm(2P₂→1S₃)，用强度对比法测量电子激发温度，利用氮分子第二正带系(C 3Π_u→B 3Π_g)计算氮分子振动温度。实验结果表明：电子激发温度和分子振动温度均随电压的增加而增加，并且电子激发温度随电压的变化速率大于分子振动温度的变化速率。

Study on Plasma Temperature in Dielectric Barrier Discharge at the Middle Value of pd

The optical emission spectra of Ar/air dielectric barrier discharge (DBD) scanned from 300-800 nm near atmospheric pressure were obtained. Electron excitation temperature (T(exc)) and molecule vibrational temperature (T(v)) in Ar/air DBD at the middle value of pressure-distance (pd) product (about 6.4 x 10(3) Pa x cm) were studied. The ArI 763.51 nm(2P6 --> 1S5) and 772.42 nm(2P2 --> 1S3) lines were chosen to estimate T(exc). T(v) was measured by the N2 second positive band (C 3IIu --> B 3IIg). It was found that T(exc) and T(v) increase with increasing applied voltage. And the varying rate of T(exc) with increasing voltage is bigger than that of T(v).