论文标题
在密集的等离子体焦点中的细丝上
On filamentation in the dense plasma focus
论文作者
论文摘要
在血浆焦点研究初期，显示出血浆焦点中丝状结构的醒目图片吸引了研究人员。正如最近的全面综述中所总的那样，人们对它们的发生，起源，结构和作用的明确理解仍然不存在。这是因为通常不会在具有纯氘的“标准模式”中观察到它们，尤其是在大型安装中，但在较小的实验或具有气态掺入的范围内发现。这导致人们怀疑细丝不是等离子体焦点现象的本地特征。最近通过对干涉仪系统的新修饰进行了对PF-1000的细丝观察到PF-1000中的最新成功，该系统允许同时进行干涉测量和Schlieren摄影改变这种情况。这封信着眼于在等离子体焦点物理学的较大背景下这种发展的含义。将丝化作为电离强冲击波背后旅行电流分布的本地特征的概念化被证明是可行的范式，可以作为血浆焦点中细丝的可计算模型配方。
Striking pictures showing filamentary structures in plasma focus have intrigued researchers from the early days of plasma focus research. A definitive understanding of their occurrence, origin, structure and role in plasma focus physics is still not in sight as summarized in a recent comprehensive review. This is because they are often not observed in a "standard mode" of plasma focus operation with pure deuterium, particularly in large installations, but are found in smaller experiments or those with gaseous admixtures. This has led to the suspicion that filaments are not a native feature of the plasma focus phenomenon. Recent success in observation of filaments in PF-1000 in a pure deuterium operation by a novel modification of the interferometer system that allows simultaneous interferometry and schlieren photography changes this situation. This Letter looks at the implications of this development in the larger context of plasma focus physics. Conceptualization of filamentation as a native feature of the traveling current distribution behind an ionizing strong shock wave is shown to be a feasible paradigm that can be formulated as a computable model for filamentation in the plasma focus.
