Operation modes of the helium dielectric barrier discharge for soft ionization
Operation modes of the helium dielectric barrier discharge for soft ionization
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DOI：
10.1016/j.sab.2013.04.005
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发表时间：
2013-07
期刊：
影响因子：
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通讯作者：
S. Müller;T. Krähling;D. Veẑa;V. Horvatić;C. Vadla;J. Franzke
中科院分区：
文献类型：
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作者：
S. Müller;T. Krähling;D. Veẑa;V. Horvatić;C. Vadla;J. Franzke
在介质阻挡放电（DBD）等离子体的不同应用中，软电离能力无疑是最有趣的之一。在本文中，由毛细管 DBD 产生的氦等离子体射流穿透周围大气，根据所施加的电压和氦流量对氦等离子体射流进行了光谱研究。研究发现，施加电压的变化会导致不同的放电模式。基于以高空间分辨率测量毛细管和等离子体射流中的原子 He、N2+ 和 N2 分子的发射光谱，可以评估在哪种模式下，即在哪种条件下等离子体射流预计对分子的软电离最有效。
Among different applications of dielectric barrier discharge (DBD) plasma, the soft ionization ability is certainly one of the most interesting. In this paper the helium plasma jet, produced by a capillary DBD, penetrating in the ambient atmosphere, has been spectroscopically investigated in dependence on applied voltage and helium flow. It was found that the change of the applied voltage leads to different discharge modes. Based on the measurements of the emission spectra of atomic He and N2+and N2molecules in the capillary and in the plasma jet with high spatial resolution, it can be assessed in which mode, i.e. under which conditions the plasma jet is expected to be most effective for soft ionization of molecules.