共查询到19条相似文献,搜索用时 156 毫秒
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针对探月二期工程中的有效载荷之一极紫外相机中的多层膜光学元件高精度反射率测量的需要,建立了一台使用液体靶激光等离子体光源的小型软X射线-极紫外波段反射率计。该反射率计主要由激光等离子体光源、Mcpherson 247动狭缝掠入射单色仪及相关的数据采集系统组成。单色仪波段范围1-125nm,光谱分辨率小于0.08nm。无碎屑的液体靶激光等离子体光源的使用避免了光学元件的损坏,而动狭缝掠入射单色仪的使用则提高了光谱分辨率和波段范围。使用该反射率计实测了工作波长为13.5nm和30.4nm的Mo/Si多层膜的反射率,测量结果表明测量重复性优于±0.5%。 相似文献
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小型高精度软X射线-极紫外反射率计 总被引:1,自引:0,他引:1
针对探月二期工程中的有效载荷之一极紫外相机中的多层膜光学元件反射率测量的需要,搭建了一台使用液体靶激光等离子体光源的小型软X射线一极紫外波段反射率计。该反射率计主要由激光等离子体光源、Mcpherson247动狭缝掠入射单色仪及相关的数据采集系统组成。单色仪工作波段为1~125nm,光谱分辨率〈0.08nm。无碎屑的液体靶激光等离子体光源的使用避免了光学元件的损坏,而动狭缝掠入射单色仪的使用则提高了光谱分辨率和波段范围。使用该反射率计实测了工作波长为13.5nm和30.4nm的Mo/Si多层膜的反射率,测量结果表明测量重复性优于±0.5%,实现了对多层膜反射率的高精度测量。 相似文献
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文章详尽地阐述了封闭型超软X射线正比计数管的设计指标,分析了诸性能指标在设计中的地位及其影响因素。在介绍该种计数管的具体设计方法中,推导了计算圆柱型正比计数管有效长度的半经验公式。实验结果表明:所设计的正比计数管在2~4Å的X波段内有良好的性能,且其存放寿命已达两年以上。 相似文献
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随着宇宙软X射线探测技术的发展,超薄聚合物材料越来越多地作为软 X 射线滤光片用,也作为窗口材料,应用于正比计数器等。如,聚对二甲苯(Parylene-N)、聚脂(Mylar)、聚碳酸酯(Kimfoil)、聚乙烯醇缩甲醛(Formvar)、聚丙烯等。但人们一致认为:聚丙烯是其中最好的软X射线窗口材料。 相似文献
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长春光机所软X射线-极紫外波段光学研究 总被引:2,自引:2,他引:0
综述了我所软X射线-极紫外波段关键技术的研究进展。描述了软X射线-极紫外波段光源技术,研制了工作波段为6~22 nm的微流靶激光等离子体光源;介绍了光子计数成像探测器技术,研制出了有效直径为25 mm,等效像元分辨率为0.3 mm的极紫外波段探测器;开展了超光滑表面加工、检测技术的研究,研制了超光滑表面抛光机,加工出高面形精度的超光滑表面,面形精度为6 nm(RMS值),表面粗糙度达0.6 nm(RMS值);进行了软X射线-极紫外波段多层膜技术的研究,研制出13 nm处反射率为60%的多层膜反射镜,150 mm口径反射镜的反射率均匀性优于±2.5%;最后,讨论了软X射线-极紫外波段测量技术研究,研制出该波段反射率计,其测量范围为5~50 nm,光谱分辨率好于0.2 nm,测量重复性好于±1%。在上述关键技术研究基础上,研制出了极紫外波段成像仪和空间极紫外波段太阳望远镜,这些仪器在我国空间科学研究项目中发挥了作用。 相似文献
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Mayer M Grévent C Szeghalmi A Knez M Weigand M Rehbein S Schneider G Baretzky B Schütz G 《Ultramicroscopy》2011,111(12):1706-1711
Best resolutions in X-ray focusing are obtained to date by using diffractive lenses called Fresnel zone plates (FZPs). Their further improvement is nevertheless hindered by fundamental limitations in the employed manufacturing techniques. Here, we show a novel method to fabricate FZPs based on multilayer deposition with atomic layer deposition (ALD) and subsequent sectioning with focused ion beam (FIB). For the first time a multilayer FZP working in the soft X-ray range was prepared and could achieve the best resolution obtained so far for multilayer FZPs by resolving features below 39 nm in size in a scanning soft X-ray microscope. The new technique presents high potential for high resolution microscopy in both the soft and hard X-ray range. 相似文献
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窄光谱带宽X射线刻蚀多层膜光栅 总被引:1,自引:0,他引:1
结合X射线荧光分析和同步辐射单色器对窄光谱带宽多层膜的需求,开展了窄光谱带宽刻蚀多层膜光栅的理论和实验研究.用平均密度法从理论上阐明将多层膜刻蚀成不同刻蚀比的多层膜光栅后,光谱分辨率将得到提高.用磁控溅射方法制备了W/C多层膜,并用常规的光刻工艺对其进行刻蚀,得到了刻蚀后的多层膜光栅.掠入射X射线衍射测量表明,刻蚀后多层膜的衍射峰位置向小角方向移动,多层膜光栅没有改变剩余多层膜的结构,而且带宽减小,光谱分辨率得到提高,说明实验采用的工艺方法和工艺路线可以满足制作窄光谱带宽刻蚀多层膜光栅的要求,为今后进一步研究实用化元件打下了基础. 相似文献
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A compact Schwarzschild soft X-ray microscope using a laser-produced plasma soft X-ray source has been developed. The laser-produced plasma source, which is small but of high brilliance, has made it possible to use the soft X-ray microscope in a small laboratory. The microscope is composed of a Schwarzschild objective and a grazing incidence mirror condenser. Image contrast for biological specimens in soft X-ray regions is investigated briefly. It is possible to observe the fine structures of a thin specimen at a wavelength of 15 nm; at this wavelength high-contrast images of biological specimens have been obtained with a single laser shot of pulse width of 8 ns at a resolution of 0·3 μm. The resolution of the system is limited by the detector. 相似文献
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Multilayer optics for the EUV and soft X-rays 总被引:3,自引:0,他引:3
1Introduction Engineersandscientistsinfieldsasdiverse asmicrolithographyandspaceastronomyhavea commonneedtouse“light”rangingfromEUV tothesoftX rayregion.Theextremeultraviolet andsoftX rayspectralregionliebetweentheul travioletandthehardX rayregionsoftheelec tromagneticspectrum.Inspiteofthesmooth transitionsbetweenthespectralsubdivisionsit’s worthtodefineroughlytheirapproximatebor ders[1]:extremeultravioletEUV~50nmto~5nm~25eVto~250eV,softX rayregion~5nmto~0.2nm~250eVto~6keV.The… 相似文献
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本文介绍我们首先使用一块软X射线多层膜反射镜作为色散元件而研制的同步辐射软X射线反射率计的软硬件结构、功能与特点,并报告了实测结果。 相似文献
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In order to visualize the functionality of a biological cell, it is often desirable to label specific proteins. In this work we concentrate on the optical theory of visualizing colloidal gold labels with soft X-ray microscopes, where scattering from small gold spheres used as labels dominates the image. Using numerical simulations of bright and dark field imaging, we compare different configurations of condenser and objective lenses in transmission X-ray microscopes, and configurations of detector and objective lens in scanning transmission X-ray microscopes. It is verified that the contrast of small, closely spaced features is strongly affected by changes in these configurations; the optimum situation is to have the condenser aperture (in TXM) or detector aperture (in STXM) equal to 3/2 that of the objective numerical aperture. 相似文献