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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Multi-scale dynamics in externally excited glow discharge plasma
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Multi-scale dynamics in externally excited glow discharge plasma

机译:外部激发辉光放电等离子体的多尺度动力学

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摘要

Time series analysis of fluctuations excited due to external perturbation in a dc glow discharge plasma system is presented. Analysis shows that the observed data is non-Gaussian in nature and has purely deterministic behavior. The oscillations are bi-periodic in nature without any occurrence of chaos with increasing discharge voltage. Two dominant frequencies 100 KHz and 200 KHz with background noise are observed. The Hurst coefficient is also evaluated for the data sets and is seen to be greater than 0.5 for all the cases. The observed bi-periodic oscillations have their origin due to some nonlinearities in the system. The observed frequencies are found to be due to ionization instability and ion acoustic instability.
机译:提出了对在直流辉光放电等离子体系统中由于外部扰动而激发的波动的时间序列分析。分析表明,观察到的数据本质上是非高斯的,具有纯粹的确定性行为。振荡本质上是双周期的,不会随着放电电压的增加而出现任何混乱。观察到两个具有背景噪声的主频100 KHz和200 KHz。还对数据集评估了赫斯特系数,并且在所有情况下都认为Hurst系数大于0.5。由于系统中存在一些非线性,因此观察到的双周期振荡有其起源。发现观察到的频率是由于电离不稳定性和离子声不稳定性。

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