On the use of the intensity ratio of He lines for electric field measurements in atmospheric pressure dielectric barrier discharge
On the use of the intensity ratio of He lines for electric field measurements in atmospheric pressure dielectric barrier discharge
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DOI：
10.1088/0022-3727/47/5/055204
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发表时间：
2014-02
期刊：
影响因子：
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通讯作者：
S. Ivković;G. Sretenović;B. Obradović;N. Cvetanović;M. Kuraica
中科院分区：
文献类型：
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作者：
S. Ivković;G. Sretenović;B. Obradović;N. Cvetanović;M. Kuraica
本文提出了一种测量氦低温常压放电阴极区电场的新方法，并进行了试验。该方法利用He I 21P-31D （667.8 nm）和He I 21P-31S （728.1 nm）两条氦单线的强度比。首先利用氦介质阻挡放电中He I 21P-41D 492.19 nm谱线及其禁谱线的Stark极化光谱得到了谱线强度与电场的关系。利用所涉及原子能级的碰撞辐射模型，确定并得到了线比对局地电场强度的函数依赖关系。最后，将该方法应用于大气压DBD中电场时空演化的测量和研究。
In this paper a new method is proposed and tested for electric field measurements in the cathode region of a low-temperature atmospheric pressure discharge in helium. The method uses intensity ratio of two helium singlet lines: He I 21P–31D at 667.8 nm and He I 21P–31S at 728.1 nm. The correlation between the line intensity and the electric field was firstly obtained via Stark polarization spectroscopy of He I 21P–41D 492.19 nm line and its forbidden counterpart in a dielectric barrier discharge (DBD) in helium. Collisional–radiative model for the involved atomic levels is utilized to confirm and obtain the functional dependence of the line ratio on the local electric filed strength. Finally, the new method was used for measurement and investigation of space–time evolution of electric field in the atmospheric pressure DBD.