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多射线放射和图像跟踪用于量化激光驱动锡喷射微喷射中的膨胀

Yuchen Sun¹, Joshua Hammons¹, Daniel Champion²

¹Lawrence Livermore National Laboratory, Livermore, California 94550, USA.

The Review of scientific instruments

|December 13, 2024

概括

射出微喷气体的膨胀比弹道运输模型预测的要小. 这项研究使用多同步放射学来跟踪喷气动力学,为未来的粒子相互作用研究提供了基础.

科学领域:

实验性的流体动力学.
高速度粒子运输的高速运输.
射线成像应用X射线成像应用

背景情况:

喷射微流,微米级粒子流的速度超过1公里/秒,是由与表面的冲击相互作用产生的.
了解它们的运输动态对于各种科学和工程领域至关重要.

研究的目的:

量化分析喷射微喷气的运输动态和随时间的扩张.
将实验观测与理论弹道运输模型进行比较.

主要方法:

使用多X射线放射图像平台与同步源进行高分辨率成像.
应用交叉相关算法来追踪喷流区域,并使用规范面积和面积密度量化扩张.
拍摄了八张连续的图像,以观察喷气式飞机的演变.

主要成果:

观察到弹射微喷气体的膨胀比弹道运输计算预测的要小.
使用图像分析技术对传播时间的量化喷气膨胀.

结论:

该研究提供了与弹道预测相比,微喷气扩张减少的实验证据.
建立了结合同步射线和图像跟踪的基础方法论,用于未来的粒子动态研究.

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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...