Characterization of atmospheric electrodeless microwave plasma in nitrogen
Characterization of atmospheric electrodeless microwave plasma in nitrogen
复制标题
氮气中大气无电极微波等离子体的表征
DOI：
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发表时间：
2018
影响因子：
1.6
通讯作者：
M. Bak
中科院分区：
文献类型：
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作者：
Hojoong Sun;Jungwun Lee;M. Bak
在这项研究中，我们研究了在纯氮气中有更大的等离子体体积时，在没有电极的情况下产生的大气微波等离子体。光学发射光谱被用来测量等离子体的平移、转动和振动温度。随后，开发了分别考虑平转、振动和电子温度的三温等离子体动力学模拟，并进行了研究，以研究维持等离子体的反应路径。发现等离子体的平移、转动和振动温度是相同的，并且与流速无关地达到大约6000K。在等离子体区域，由于气体温度高，分子氮在很大程度上被解离成原子，等离子体是通过缔合电离而不是电子碰撞电离来维持的。
In this study, we investigate atmospheric microwave plasmas produced without electrodes while having a larger plasma volume in pure nitrogen. Optical emission spectroscopy is conducted to measure the translational, rotational, and vibrational temperatures of the plasma. Subsequently, three-temperature plasma kinetic simulations that consider the trans-rotational, vibrational, and electron temperatures separately are developed and conducted to study reaction pathways that sustain the plasma. The translational, rotational, and vibrational temperatures of the plasma are found to be the same and reach approximately 6000 K independent of the flow rate. In the plasma region, the molecular nitrogen is found to be dissociated into atoms to a significant extent because of the high gas temperature, and the plasma is sustained via associative ionizations rather than the electron-impact ionizations.