利用新型编码光圈研究 X 射线等离子体辐射的空间分布

IF 1.4 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY
E. A. Bolkhovitinov, A. A. Rupasov, A. A. Kologrivov, S. A. Pikuz, I. N. Tilikin, T. A. Shelkovenko, O. P. Ivanov, V. N. Potapov
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引用次数: 0

摘要

为了研究放电等离子体 X 射线源强度的空间分布,我们使用了一种新型编码光圈,这种光圈由相互垂直的透明和不透明条带相交而成,其宽度由随机数发生器选择。通过编码光圈的辐射产生了复杂的编码图像图案,并记录在无保护涂层的富士 TR 荧光成像板上。为了从该图案中重建等离子体辐射强度的空间分布,采用了一种基于迭代法的数学程序,以解决由弗雷德霍尔姆第一类积分方程给出的一个不正确问题。结果表明,与针孔照相机相比,使用编码光圈不仅大大提高了记录系统的光强,而且还能获得不低于针孔照相机分辨率的放电等离子体空间分辨率。已经证明,所开发的迭代法既适用于接近点的光源,也适用于扩展的发射物体。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study of the Spatial Distribution of X-Pinch Plasma Radiation Using a New-Type Coded Aperture

To study the spatial distribution of the intensity of an X-ray source of electric discharge plasma, a new-type coded aperture, which is a structure of intersecting mutually perpendicular transparent and opaque strips with the widths selected using a random number generator, has been used. The radiation passed through the coded aperture has produced a complex pattern of the coded image, which has been recorded on a Fuji TR fluorescent imaging plate without a protective coating. A mathematical procedure based on the iterative method of solving an incorrectly posed problem given by the Fredholm integral equation of the first kind has been applied to reconstruct the spatial distribution of plasma radiation intensity from this pattern. It has been shown that the use of the coded aperture not only has increased significantly the light intensity of the recording system in comparison with a pinhole camera, but also has made it possible to obtain a spatial resolution of the discharge plasma no worse than the resolution of the pinhole camera. The applicability of the developed iterative method for both sources close to point ones and extended emitting objects has been demonstrated.

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来源期刊
JETP Letters
JETP Letters 物理-物理:综合
CiteScore
2.40
自引率
30.80%
发文量
164
审稿时长
3-6 weeks
期刊介绍: All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.
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