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首页> 外文期刊>Plasma Sources Science & Technology >The role of C_2H_4 for the acetylene chemistry in particle forming Ar/He/C_2H_2 plasmas studied via quantitative mass spectrometry
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The role of C_2H_4 for the acetylene chemistry in particle forming Ar/He/C_2H_2 plasmas studied via quantitative mass spectrometry

机译：定量质谱研究C_2H_4对乙炔化学在Ar / He / C_2H_2等离子体形成中的作用

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摘要

The initial polymerization reactions in particle forming Ar/He/C_2H_2 plasmas are studied by means of molecular beam mass spectrometry. The mass spectra are quantified with the help of Bayesian probability theory. The C_x H_y production in C_2H_2 plasma is studied by measuring the temporal evolution of the mass spectrometer signal under the influence of added C_2H_4 to the gas mixture. It is shown that C_4H_4 is very quickly formed after plasma ignition in reactions of C_2H_4 with C_2H radicals. Other C_nH_4 molecules, i.e. C_3H_4, C_5H_4 and C_6H_4, are formed in reactive pathways involving C_2H_4, as well. C_6H_6, which could not be uniquely identified as an aromatic or linear molecule, shows a similar trend with additional C_2H_4. But in this case more C_2H_4 is needed to detect the same relative change compared with C_4H_4. This is probably because more reaction steps are needed to form C_6H_6. It is shown that C_2H_4 is very likely produced in the acetylene plasma.
机译：通过分子束质谱研究了形成Ar / He / C_2H_2等离子体的初始聚合反应。借助贝叶斯概率理论对质谱进行定量。通过测量在混合气体中添加C_2H_4的影响下质谱仪信号的时间演变，研究了C_2H_2等离子体中C_x H_y的产生。结果表明，C_2H_4与C_2H自由基的反应在等离子体点火后很快形成C_4H_4。其他C_nH_4分子，即C_3H_4，C_5H_4和C_6H_4，也都在涉及C_2H_4的反应路径中形成。不能唯一地识别为芳族或线性分子的C_6H_6与其他C_2H_4表现出相似的趋势。但是在这种情况下，与C_4H_4相比，需要更多的C_2H_4来检测相同的相对变化。这可能是因为需要更多的反应步骤才能形成C_6H_6。结果表明，C_2H_4很可能在乙炔等离子体中产生。

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