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首页> 外文期刊>Physics of plasmas >Analysis of spatially resolved Z-pinch spectra to investigate the nature of 'bright spots'
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Analysis of spatially resolved Z-pinch spectra to investigate the nature of 'bright spots'

机译：分析空间分辨的Z捏谱以研究“亮点”的性质

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摘要

Localized, intensely radiating regions are often observed in Z pinches. High resolution images of such areas have been recorded at least as far back as the 1970s. However, there is as yet no widely accepted consensus on the nature of these "bright spots" or how they are formed. This phenomenon has also been referred to "hot spots" or "micropinches." To shed further light on this issue, we have analyzed axially resolved K-shell spectra from 4 Z pinches driven by the refurbished Z generator ("ZR") at Sandia National Laboratories, and the previous version of the Z machine ("Z"). The atomic numbers of the loads varied from 13 to 29. We find that higher spatial K-shell intensity in the Al pinch correlates with density. The K-shell intensity within a copper shot taken on ZR correlates strongly with increased electron temperature, but another, somewhat less well-diagnosed copper shot from Z shows correlation with density. The bright spots in a Ti pinch correlate with neither density nor temperature, but do correlate with the product of density and diameter (proportional to opacity). This opacity correlation is also observed in the other 3 pinches.
机译：经常在Z夹中观察到局部的，辐射强烈的区域。这些区域的高分辨率图像至少可以追溯到1970年代。但是，关于这些“亮点”的性质或如何形成，目前尚无广泛接受的共识。这种现象也被称为“热点”或“微夹点”。为了进一步阐明该问题，我们分析了桑迪亚国家实验室（Sandia National Laboratories）的翻新Z发生器（“ ZR”）驱动的4个Z压合点的轴向分辨K壳光谱，以及以前版本的Z机（“ Z”） 。负载的原子序数从13到29不等。我们发现，铝捏中较高的空间K壳强度与密度相关。在ZR上拍摄的铜弹中的K壳强度与电子温度的升高密切相关，但是从Z拍摄的，诊断程度稍差的另一个铜弹则与密度相关。 Ti夹点中的亮点与密度和温度均不相关，但与密度和直径的乘积（与不透明度成比例）相关。在其他3个夹点中也观察到这种不透明度相关性。

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