Impurity intrusion in radio-frequency micro-plasma jets operated in ambient air
Impurity intrusion in radio-frequency micro-plasma jets operated in ambient air
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DOI：
10.1088/0022-3727/44/32/325201
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发表时间：
2011-05
期刊：
影响因子：
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通讯作者：
B. Niermann;A. Kanitz;M. Böke;J. Winter
中科院分区：
文献类型：
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作者：
B. Niermann;A. Kanitz;M. Böke;J. Winter
利用可调谐二极管激光吸收光谱技术测量了大气压射频微等离子体射流中氦He（3S1）亚稳原子的空间和时间分辨浓度。空间分布和寿命测量显示出从前喷嘴进入放电的空气和来自气体供应系统的杂质的显著影响。淬火的可吸收性是用来推断定量浓度的侵入杂质。杂质分布沿着射流轴确定从光学发射光谱，以及它们的依赖于通过射流的进料气体流量。
Space and time resolved concentrations of helium He (3S1) metastable atoms in an atmospheric pressure radio-frequency micro-plasma jet were measured using tunable diode laser absorption spectroscopy. Spatial profiles and lifetime measurements show significant influences of air entering the discharge from the front nozzle and of impurities originating from the gas supply system. Quenching of metastables was used to deduce quantitative concentrations of intruding impurities. The impurity profile along the jet axis was determined from optical emission spectroscopy as well as their dependence on the feed gas flow through the jet.