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Three-dimensional cellular ultrastructure resolved by X-ray microscopy.X 射线显微镜解析的三维细胞超微结构。
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A Compact Soft X-Ray Microscope using an Electrode-less Z-Pinch Source.一种使用无电极Z箍缩源的紧凑型软X射线显微镜。
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X-ray tomography of Schizosaccharomyces pombe.粟酒裂殖酵母的X射线断层扫描
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氮化硼激光产生等离子体的水窗线发射的激发波长依赖性

Excitation wavelength dependence of water-window line emissions from boron-nitride laser-produced plasmas.

作者信息

Crank M, Harilal S S, Hassan S M, Hassanein A

出版信息

J Appl Phys. 2012 Feb 1;111(3):33301-333016. doi: 10.1063/1.3682087. Epub 2012 Feb 9.

DOI:10.1063/1.3682087
PMID:22396624
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3293343/
Abstract

We investigated the effects of laser excitation wavelength on water-window emission lines of laser-produced boron-nitride plasmas. Plasmas are produced by focusing 1064 nm and harmonically generated 532 and 266 nm radiation from a Nd:YAG laser on BN target in vacuum. Soft x-ray emission lines in the water-window region are recorded using a grazing-incidence spectrograph. Filtered photodiodes are used to obtain complementary data for water-window emission intensity and angular dependence. Spectral emission intensity changes in nitrogen Ly-α and He-α are used to show how laser wavelength affects emission. Our results show that the relative intensity of spectral lines is laser wavelength dependent, with the ratio of Ly-α to He-α emission intensity decreasing as laser wavelength is shortened. Filtered photodiode measurements of angular dependence showed that 266 and 532 nm laser wavelengths produce uniform emission.

摘要

我们研究了激光激发波长对激光产生的氮化硼等离子体水窗发射线的影响。通过将1064 nm以及从Nd:YAG激光器谐波产生的532和266 nm辐射聚焦到真空中的BN靶上来产生等离子体。使用掠入射光谱仪记录水窗区域的软X射线发射线。使用滤波光电二极管来获取水窗发射强度和角度依赖性的补充数据。利用氮Ly-α和He-α光谱发射强度的变化来展示激光波长如何影响发射。我们的结果表明，谱线的相对强度取决于激光波长，随着激光波长缩短，Ly-α与He-α发射强度之比降低。滤波光电二极管对角度依赖性的测量表明，266和532 nm激光波长产生均匀发射。