Time-Resolved Fourier Transform Emission Spectroscopy of He/CH4 in a Positive Column Discharge
Time-Resolved Fourier Transform Emission Spectroscopy of He/CH4 in a Positive Column Discharge
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DOI：
10.1021/jp211772d
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发表时间：
2012-03-29
影响因子：
2.9
通讯作者：
Ferus, Martin
中科院分区：
文献类型：
--
作者：
Civis, Svatopluk;Kubelik, Petr;Ferus, Martin
将时间分辨傅里叶变换红外发射光谱应用于He/CH4混合气体中脉冲放电的研究。乙炔v(3)(3289 cm(-1))，甲烷v(3)(3019 cm(-1))和v(1)(2917 cm(-1))，CH自由基电子基态X-2Pi(R)(2309-2953 cm(-1))，C-2 Bernath电子跃迁B-1 Delta(G)-A(1)Pi(U)，(3337-3606 cm(-1))，分子氢发射跃迁5g-4f和2p-2s，原子氢，和氦原子在1800-4000厘米(-1)范围内被监测到。获得了在30微米的S时间间隔内，在放电脉冲期间和之后CH自由基的转动和振动温度的时间分布。动力学模型被用来研究单个碎片形成和腐烂的化学动力学。将模型计算结果与实验发射光谱进行了比较。
Time-resolved Fourier transform infrared emission spectroscopy was applied to the study of a pulsed discharge in a He/CH4 mixture. The dynamics of the formation and decay of acetylene v(3) (3289 cm(-1)), methane v(3) (3019 cm(-1)) and v(1) (2917 cm(-1)), the CH radical electronic ground state X-2 Pi(r) (2309-2953 cm(-1)), C-2 Bernath electronic transition B-1 Delta(g)-A(1)Pi(u), (3337-3606 cm(-1)), molecular hydrogen emission transitions 5g-4f and 2p-2s, atomic hydrogen, and atomic helium were monitored in the 1800-4000 cm(-1) region. The time profile of the rotational and vibrational temperature of the CH radical was obtained for a 30 mu s time interval during and after the discharge pulse. A kinetic model was used for the study of the chemical dynamics of the formation and decay of the individual fragments. The results from the model were compared to the experimental emission spectra.