超短超强激光与金属靶作用产生硬X射线照相
Radiography of hard X-ray produced by ultra-short ultra-intense laser-metal targets interactions
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摘要: 超短超强激光与物质相互作用产生硬X射线的应用之一是X射线照相。利用等离子体国家重点实验室的SILEX-Ⅰ激光器进行了超短超强激光与高Z平面金属厚靶相互作用产生硬X射线作为照相光源的照相实验研究。采用闪烁体+胶片和闪烁体+CCD相机的方式分别接收X射线图像，在靶的侧向和后向得到清晰X射线图像。由于采用的闪烁体厚度和照相几何不同，图像质量和空间分辨率存在明显差别。这种照相技术不仅可以作为激光与固体靶相互作用产生光源研究的基础手段，而且可以作为激光与固体靶相互作用致硬X射线的探测方式。Abstract: Radiography is one application of the hard X-ray derived from ultra-short ultra-intense(US-UI) laser-matter interactions. Experiments about hard X-ray production from US-UI laser interaction with high-Z metal targets, on SILEX-Ⅰ laser facility at National Key Laboratory of Laser Fusion have obtained radiographs. The radiograph receivers were sandwich detectors with scintillation layer and film and with scintillation and CCD. Radiograph’s quality and resolution vary obviously because of different scintillator thickness and magnification ratio. This radiography technique not only can be the basic method for investigating the advanced X-ray imaging source, but also can be the detection system for studying laser-solid target interactions.
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Key words:
- ultra-short ultra-intense laser /
- hard x-ray /
- x-ray radiography /
- hot-electon
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