Evolution of filament-like compact structures in small 3 kJ dense plasma focus discharges

IF 2 3区物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS

Physics of Plasmas Pub Date : 2024-08-09 DOI:10.1063/5.0187304

P. Kubes, L. Marciniak, M. J. Sadowski, M. Paduch, B. Cikhardtova, J. Cikhardt, J. Kravarik, J. Malir, V. Munzar, J. Novotný, K. Rezac

引用次数: 0

Abstract

This paper presents the filamentary structure of the pinched column in a smaller plasma focus device filled with deuterium. The deflections were observed using schlieren and differential interferometry techniques. The observed filaments have a transverse diameter of 40–200 μm, which could be interpreted based on the electric current hypothesis as local concentrations of electric current. The evolution of filaments was compared with global structures recorded by extra ultraviolet frames. These results provide a basis for considering the possibility of a filamentary composition of the poloidal current in compact structures. The model of filaments with a helical shape of electrical current may be able to explain the central narrow and dense cord in the axis of the column, the different lifetimes of the structures, and the submillimeter sources of fast electrons and ions.

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3 kJ 小型稠密等离子体聚焦放电中丝状紧凑结构的演变

本文介绍了在一个较小的充满氘的等离子体聚焦装置中夹柱的丝状结构。偏转是利用裂隙和差分干涉测量技术观察到的。观察到的丝状结构的横向直径为 40-200 μm，根据电流假说，可将其解释为局部电流的集中。丝状物的演变与紫外框架记录的全局结构进行了比较。这些结果为考虑紧凑结构中极性电流丝状构成的可能性提供了依据。具有螺旋形电流的丝状结构模型或许能够解释柱轴中央狭窄而密集的线状结构、不同寿命的结构以及亚毫米级的快速电子和离子源。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physics of Plasmas 物理-物理：流体与等离子体

CiteScore

4.10

自引率

22.70%

发文量

653

审稿时长

2.5 months

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