In situ quantum cascade laser (QCL) absorption spectroscopy is used to investigate the effect of admixed water in a pulsed CO 2 glow discharge on the vibrational excitation of CO 2 and CO and the conversion of CO 2 . Time-resolved transmittance spectra of the non-equilibrium CO 2 plasma are measured with a 100 μ s time resolution. A custom fitting routine is used to extract the time evolution of the gas temperature, rotational temperature and vibrational temperatures of CO 2 and CO, while the CO 2 conversion is determined from measured CO 2 and CO number densities. Rotational Raman scattering is additionally performed in the centre of the reactor to verify measured rotational and vibrational temperatures from line-of-sight absorption spectroscopy. The plasma is operated at 6.7 mbar, with up to 10% water admixed, and is pulsed with a 5–10 ms on-off cycle, with a current of 50 mA supplied during the...

中文翻译：

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使用量子级联激光吸收光谱法测量的CO 2辉光放电中的水振动猝灭

利用原位量子级联激光（QCL）吸收光谱技术研究了脉冲CO 2辉光放电中混合水对CO 2和CO的振动激发以及CO 2转化的影响。非平衡CO 2等离子体的时间分辨透射光谱以100μs的时间分辨率进行测量。使用定制的拟合例程来提取CO 2和CO的气体温度，旋转温度和振动温度的时间演变，而CO 2转化率则由测量的CO 2和CO数密度确定。另外在反应堆中心进行旋转拉曼散射，以验证从视线吸收光谱法测得的旋转和振动温度。等离子在6.7 mbar下运行，混合了多达10％的水，