Experimental and theoretical study of dissociation in the positive column of a hydrogen glow discharge
Experimental and theoretical study of dissociation in the positive column of a hydrogen glow discharge
复制标题
氢辉光放电正极柱离解的实验与理论研究
DOI：
10.1063/1.366110
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
M. Touzeau
中科院分区：
文献类型：
--
作者：
J. Amorim;J. Loureiro;G. Baravian;M. Touzeau
研究了典型工况下氢辉光放电的正柱：气体压力为0.3 ~ 5.0 Torr，放电电流为1 ~ 50 mA。利用光学发射光谱、光学吸收光谱和激光诱导荧光分别测定了气体温度（300<Tg<600 K）、基态氢原子密度（1012<[H(1s)]<1013 cm−3）和氢原子的动力学温度（336<Ta<1600 K）。使用Langmuir探针测量正极柱的电场（8<E<61 V cm−1）。建立了基于均匀电子玻尔兹曼方程解与H2（X 1Σg+,v）、H原子和H -离子振动能级速率平衡方程的动力学模型，以预测这些物质的浓度。从测量和计算的H原子浓度之间的比较，在耐热玻璃壁上的再缔合概率估计为10−2。
The positive column of a hydrogen glow discharge was studied under typical operating conditions: gas pressure from 0.3 up to 5.0 Torr and discharge current from 1 up to 50 mA. Optical emission spectroscopy, optical absorption spectroscopy, and laser induced fluorescence have been employed in order to determine the gas temperature (300<Tg<600 K), the density of ground state hydrogen atoms (1012<[H(1s)]<1013 cm−3), and the kinetic temperature of H atoms (336<Ta<1600 K), respectively. Langmuir probes were utilized to measure the electric field (8<E<61 V cm−1) in the positive column. A kinetic model based on the solutions to the homogeneous electron Boltzmann equation coupled to a set of rate balance equations for the vibrational levels H2(X 1Σg+,v), H atoms, and H− ions was developed in order to predict the concentrations of these species. From a comparison between the measured and calculated concentrations of H atoms, the reassociation probability on the wall, in Pyrex glass, is estimated to be ≅10−2.