研究目的
To present an improved design of the Fresnel ultra high-resolution imager instrument for simultaneous imaging of Al and Ti X-ray emission in high-energy density plasma experiments.
研究成果
The improved high-resolution X-ray imager, FUHRIx2, successfully captures simultaneous images of Al and Ti X-ray emission lines with resolutions of (2.7 ± 0.3) μm for Al and (5.5 ± 0.3) μm for Ti. The system's versatility is demonstrated by changing the observed energy of one channel. Future work will investigate chromatism effects on diagnostic performances.
研究不足
The resolution measurements without spectral selection on a laser facility are considered an upper limit due to the integration of the whole spectrum, which degrades resolution. The absence of multilayer mirrors in some experiments affects the resolution and contrast of the images.
1：Experimental Design and Method Selection:
The study employs an Ultra-High-Intensity (UHI) laser to generate plasma in an Al-Ti mixed target, using two transmission Fresnel phase zone plates (FZPs) for imaging.
2：Sample Selection and Data Sources:
The targets are composed of mixed materials of Al and Ti, with X-ray emission lines of Al Heβ (or Lyβ) and Ti Heα being the focus.
3：List of Experimental Equipment and Materials:
Includes UHI laser, Fresnel zone plates, multilayer mirrors, and a Princeton PI-MTE CCD camera.
4：Experimental Procedures and Operational Workflow:
Involves generating plasma with the UHI laser, focusing X-ray emission through FZPs, and spectral selection with multilayer mirrors before detection.
5：Data Analysis Methods:
Spatial resolution measurements are conducted using the knife edge method, and re?ectivity of multilayer mirrors is measured.
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