In the present work, we report development of a DC glow discharge plasma (GDP) set-up to study controlled evolution of anodic structures having distinctive geometry, size and layers, generated in front of a positively biased electrode, submerged in unmagnetized plasma. For such an anodic structure, we have also investigated the condition under which the turbulence is triggered. Characteristic of these structures, generated in front of a positively biased electrode, depends on multiple parameters such as the ratio of anode to cathode size, electrode separation, gas pressure, biasing configuration such as anode bias, cathode bias and grounding schemes. We attempted to classify different anodic structures observed experimentally, as anode glow, fireball, anode spot, double layer and multiple double layers (MDLs) based on its physical characteristics. Among these structures the present investigation is focused on MDLs. The number of layers, observed in MDLs varied from as high as si...

中文翻译：

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未磁化等离子体中阳极结构的产生场景和湍流的实验实现

在当前的工作中，我们报告了直流辉光放电等离子体（GDP）装置的开发，该装置用于研究在正偏压电极前产生的，浸没在未磁化等离子体中的，具有独特几何形状，尺寸和层的阳极结构的受控演化。对于这种阳极结构，我们还研究了引发湍流的条件。在正偏压电极前产生的这些结构的特性取决于多个参数，例如阳极与阴极尺寸的比率，电极间距，气压，诸如阳极偏压的偏压配置，阴极偏压和接地方案。我们尝试根据其物理特性将实验观察到的不同阳极结构分类为阳极辉光，火球，阳极斑点，双层和多层（MDL）。在这些结构中，当前的研究集中在MDL上。在MDL中观察到的层数高达si ...