圆柱形介质阻挡放电等离子体光谱诊断

在350~1150 nm范围内对开放空间Ar气介质阻挡放电等离子体的发射光谱进行测量,表明Ar发射谱线主要集中在680 nm~950 nm,且都为Ar原子谱线。采用发射光谱相对强度对比法,选取相距较近且有相同下能级的727.29 nm(2P2-1S4),738.40 nm(2P3-1S4)和751.47 nm(2P5-1S4)三条光谱测量电子温度。通过对在Ar气和空气中放电谱线的对比和分析,得出发射光谱相对强度与电源功率的关系。最终得出若要便于工业应用和光谱测量,需要选择特定的气体流量和电源功率。

Spectral Diagnosis of Cylinder Dielectric Barrier Discharge Plasma

The emission spectral lines of argon plasma at atmospheric pressure was measured from 350 nm to 1150 nm.It was shown that the spectral range,which is attributed to neutral Ar atoms,is from 680 nm to 950 nm.The electron temperature was measured by the relative intensity ratio based on the spectral lines with the same bottom level,727.29 nm(2P2-1S4),738.40 nm(2P3-1S4) and 751.47 nm(2P51S4).The spectral lines between discharge in Ar and Air were compared and the relation between the relative intensity and the power of source was investigated. It was found that different gas flow and power of source are related to application in industry and spectrum measurement.