We report on the self-organization of multiple double layers (MDLs) and self-organized criticality (SOC) behavior through subsequent layer reduction process around the anode during DC glow discharge in a linear cylindrical vacuum vessel. The present study provides an insight into the characteristic features of self-organized MDLs around the anode itself and the effect of an external magnetic field during its evolution. The MDL formations around the anode initiate through an abrupt jump in the floating potential, ion saturation, and discharge current signals, which suggests an associated sheath—plasma instability of the system. The frequency spectrum of the floating potential exhibits mixed mode oscillations, which later disappears on applying an external magnetic field. The comparative results reveal the complex nature of a simple glow discharge through repeated coupling and decoupling of MDL dynamics during layer reduction process in the presence of an external magnetic field in cusp configuration, while the discharge turns largely oscillatory in the presence of an external magnetic field in mirror configuration. Existence of the SOC behavior in the system is further investigated through nonlinear dynamical analysis of the floating potential fluctuations. The present study on self-organization phenomena in a glow discharge plasma is important for applications regarding utilization or mitigation of self-organization. Self-organized patterns are often formed during plasma interaction with the liquid surface, which play a vital role in diverse applications of plasmas in nanomaterial synthesis and medicine.

中文翻译：

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磁化等离子体中多个阳极双层的自组织

我们通过线性圆柱形真空容器中的直流辉光放电期间阳极周围的后续层还原过程报告了多层双层 (MDL) 的自组织和自组织临界 (SOC) 行为。本研究提供了对围绕阳极本身的自组织 MDL 的特征以及外部磁场在其演化过程中的影响的深入了解。阳极周围的 MDL 形成是通过浮动电位、离子饱和和放电电流信号的突然跳跃开始的，这表明系统存在相关的鞘 - 等离子体不稳定性。浮动电位的频谱表现出混合模式振荡，后来在施加外部磁场时消失。比较结果揭示了在存在尖端配置的外部磁场的情况下，在层还原过程中通过重复耦合和解耦 MDL 动力学的简单辉光放电的复杂性质，而在存在外部磁场的情况下，放电在很大程度上变得振荡在镜像配置中。通过浮动电位波动的非线性动力学分析，进一步研究了系统中 SOC 行为的存在性。目前对辉光放电等离子体中自组织现象的研究对于有关利用或减轻自组织的应用很重要。自组织模式通常在等离子体与液体表面相互作用期间形成，这在等离子体在纳米材料合成和医学中的各种应用中起着至关重要的作用。