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Scenario of pinch evolution in a plasma focus discharge

机译：等离子体聚焦放电中的收缩现象

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摘要

In this paper, the possible evolution of a pinched plasma column is presented from the results of temporally resolved measurements using a magnetic probe, interferometry and neutron diagnostics performed on the plasma focus PF-1000 device with deuterium as the filling gas. Together with the discharge axial current of about 1.5 MA a toroidal current component of the order of 100 kA was estimated in the toroidal, helical and plasmoidal structures formed within the dense plasma column. The mass inside these structures increases due to injection of the plasma from the neighborhood regions with a higher pinching pressure. This injected plasma increases the intensity of the internal magnetic field, probably through turbulent motion and the magnetic dynamo effect. The neutrons from the D-D fusion reaction, produced during the formation and decay of plasmoidal structures and constrictions, are accompanied by changes in the axial component of the magnetic field. Then, the transformation and decay of internal closed currents can contribute to the acceleration of high-energy electrons and ions.
机译：在本文中，从在使用氘作为填充气体的等离子聚焦PF-1000装置上进行的磁探针，干涉测量和中子诊断的时间分辨测量结果中，可以看出夹挤等离子体柱的可能演变。连同大约1.5 MA的放电轴向电流，在致密等离子体柱内形成的环形，螺旋形和等离子体结构中，估计的环形电流分量约为100 kA。这些结构内部的质量由于以更高的收缩压力从邻近区域注入等离子体而增加。注入的等离子体可能通过湍流运动和磁发电机效应来增加内部磁场的强度。在等离子体结构和收缩的形成和衰减过程中产生的D-D聚变反应中子，伴随着磁场轴向分量的变化。然后，内部闭合电流的转换和衰减会有助于高能电子和离子的加速。

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