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Modeling of argon–acetylene dusty plasma

I B Denysenko, E von Wahl, S Labidi, M Mikikian, H Kersten, T Gibert, E Kovačević, N A Azarenkov2019年Plasma Physics and Controlled FusionIF 2.2出版社

The properties of an Ar/C2H2 dusty plasma (ion, electron and neutral particle densities, effective electron temperature and dust charge) in glow and afterglow regimes are studied using a volume-averaged model and the results for the glow plasma are compared with mass spectrometry measurements. It is shown that dust particles affect essentially the properties of glow and afterglow plasmas. Due to collection of electrons and ions by dust particles, the effective electron temperature, the densities of argon ions and metastable atoms are larger in the dusty glow plasma comparing with the dust-free case, while the densities of most hydrocarbon ions and acetylene molecules are smaller. Because of a larger density of metastable argon atoms and, as a result, of the enhancement of electron generation in their collisions with acetylene molecules, the electron density in the afterglow dusty plasma can have a peak in its time-dependence. The results of numerical calculations are in a good qualitative agreement with experimental results.

日本語訳

Ar/C2H2ダストプラズマの特性(イオン、電子、中性粒子密度、実効電子温度、ダスト電荷)を、グローおよびアフターグロー状態において体積平均モデルを用いて研究し、グロープラズマの結果を質量分析測定と比較した。ダスト粒子がグローおよびアフターグロープラズマの特性に本質的な影響を及ぼすことが示された。ダスト粒子による電子とイオンの捕集により、ダストを含むグロープラズマでは、ダストを含まない場合と比較して、実効電子温度、アルゴンイオン密度、準安定原子密度が高くなる一方、ほとんどの炭化水素イオン密度とアセチレン分子密度は低くなる。準安定アルゴン原子密度が高く、その結果としてアセチレン分子との衝突による電子生成が促進されるため、アフターグローダストプラズマにおける電子密度は時間依存性においてピークを示すことがある。数値計算の結果は実験結果と定性的によく一致している。

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