脉冲放电等离子体电子激发温度发射光谱诊断

利用微量Ar的发射光谱,对标准大气压N2脉冲流光放电等离子体特性进行了实验研究.在对所得Ar原子荧光谱线归属的基础上,分别采用谱线相对荧光强度比值法,玻尔兹曼曲线斜率法和费米-狄拉克布居分布模型法3种计算方法,对标准大气压N2脉冲流光放电等离子体电子激发温度进行分析比较.结果表明:采用玻尔兹曼曲线斜率法和费米-狄拉克布居分布模型法计算得到的电子激发温度非常接近,分别为(7 474±500)K和(7 480±500)K,说明本研究所涉及的脉冲流光放电等离子体至少接近局部热平衡.

Emission Spectroscopy Diagnosis of the Electron Excited Temperature in Pulse Streamer Discharge

N2 plasma characteristics in pulse streamer discharge at atmospheric pressure is studied by using trace Ar dispersion fluorescence spectrometry method.Ar atomic fluorescence spectra are assigned,and then plasma electron excited temperatures are obtained using relative fluorescence intensity ratio method and Boltzmann plot method and Fermi-Dirac distribution model,respectively.The calculated plasma electron excited temperature from Boltzmann plot method is(7 474±500)K,which is nearly equal to the one from Fermi-Dirac distribution model,(7 480±500)K.This fact shows that the atmospheric plasma by pulse streamer discharge is approximate in the state of local thermodynamic equilibrium(LTE).