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首页> 外文期刊>Plasma physics and controlled fusion >Spatial distribution of ion emission in gas-puff z-pinches and dense plasma foci
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Spatial distribution of ion emission in gas-puff z-pinches and dense plasma foci

机译：气粉Z型捏合和致密等离子体焦点的离子排放的空间分布

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摘要

Mega-ampere dense plasma foci and deuterium gas-puff z-pinches can accelerate deuterons to multi-MeV energies. Diagnostic measurements of the properties of these ions provide information about ion acceleration in z-pinch plasmas. In particular, the results from ion pinhole cameras seem to be useful for the discussion of ion acceleration mechanisms. Recently, we have used various configurations of ion pinhole cameras in deuterium gas-puff experiments on the GIT-12 generator at the Institute of High Current Electronics in Tomsk and on the HAWK generator at the US Naval Research Laboratory in Washington. The stack of radiochromic films and CR-39 solid-state nuclear track detectors recorded deuterons with energies up to 30 MeV. From our ion diagnostics, we obtained the spatial distribution of the ion source and the ion-beam divergence during the ion emission. This ion-beam divergence was found to decrease with increasing deuteron energy. At 20 MeV, the divergence of each of the individual micro-beams that composed the ion source was on the order of 10 mrad. The deflection of each micro-beam due to the azimuthal magnetic and/or radial electric fields resulted in radial stripes observed by the beam-profile detectors. By analyzing the ion pinhole images, we found that the deuterons were emitted both from a central spot and from a ring-shaped region with a rather large diameter, on the order of 1 cm. The origin and particular diameter of this ring is attributed to the geometry of the electrodes and to the distribution of the current density before the disruption.
机译：Mega-Ampere致密等离子体焦点和氘气泡Z-Pinches可以加速氘核到多Mev Energies。这些离子的性质的诊断测量提供了有关Z-PINCH等离子体中的离子加速度的信息。特别地，离子针孔摄像机的结果似乎有助于离子加速机制的讨论。最近，我们在华盛顿州的高电流电子研究所的Git-12发电机上使用了在Git-12发电机的Git-12发电机中的各种配置。一堆放射刻度薄膜和CR-39固态核轨道探测器记录了氘核，其能量高达30米。从我们的离子诊断中，我们在离子发射期间获得了离子源和离子束发散的空间分布。发现这种离子束分歧随着氘核的增加而降低。在20mev处，组成离子源的每个单个微束的分歧是约10mRad的量级。由于方位角磁性和/或径向电场引起的每个微束的偏转导致光束型材检测器观察到径向条纹。通过分析离子针孔图像，我们发现氘核既从中心点和带有相当大的直径的环形区域发射，大约1cm。该环的原点和特定直径归因于电极的几何形状和在破坏之前的电流密度的分布。

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