Coherence measurement of x-rays from x-ray laser cavity and development of x-ray optical system for application of coherent x-rays

X射线激光腔X射线的相干测量以及用于相干X射线应用的X射线光学系统的开发

• 批准号: 12650044
• 负责人: YAMAGUCHI Naohiro
• 金额: $ 2.24万
• 依托单位: Toyota Technological Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650044/
• 关键词: X-ray laser; Recombining plasma; Transeverse coherence; Young's experiment; Double target; X-ray interferometer; Transemission grating; Coherent x-ray; 再結合プラズマ法; 透過型回折格子; X線レーザー共振器; X線干渉; X線光学

Investigations of coherence diagnostics for x-ray laser radiation, x-ray laser source and soft x-ray interferometric system have been proceeded. The main results are as follows:1. The diagnostic system based on the dispersing coherence diagnostic method has been constructed. It consists of a Young's double-slit, a transmission grating, and an x-ray CCD camera. This provides wavelength dispersion by diffraction through the transmission grating in a direction perpendicular to the interference direction of the double-slit.2. Optimization studies have been performed to increase x-ray laser output in the double target configuration. A trial experiment using x-ray laser cavity has also been done in the double target configuration.3. Measurements on transverse coherence of x-ray beam from our x-ray laser source with the double target configuration have been performed. Young's interference fringe pattern has been observed for the A1 XI 3d-4fline (15.47 nm), one of the lasing lines in this experiment. On the other hand, fringe patterns are not clear for the non-lasing lines around 15 nm.4. Theoretical calculation code has been developed for the analysis of observed fringe patterns, which treats two-beam interference with partially coherent light. By comparing calculation and observed pattern, we can estimate the visibility of interference pattern and the source size.5. A new type of x-ray interferometer system has been proposed. The x-ray interferometer with two transmission grating used as beam splitters has been constructed. Soft x-ray interferometry will be performed after the optical alignment is completed.

对x射线激光辐射、x射线激光源和软x射线干涉系统的相干诊断进行了研究。主要研究结果如下：1.建立了基于离散相干诊断方法的诊断系统。它由杨氏双缝、透射光栅和X射线CCD相机组成。这通过在垂直于双缝干涉方向的方向上穿过透射光栅的衍射提供波长色散。已经进行了优化研究，以增加在双目标配置的X射线激光输出。在双靶结构下进行了X射线激光腔的实验研究.对双靶结构的X射线激光源的X射线光束的横向相干性进行了测量。在本实验的激光线之一A1 XI 3d-4fline（15.47nm）上观察到杨氏干涉条纹图。另一方面，对于15 nm附近的非激光线，条纹图案不清楚。理论计算程序已开发用于分析观察到的条纹图案，它处理与部分相干光的双光束干涉。通过计算结果与观测结果的比较，可以估计干涉图样的可见度和光源的大小.提出了一种新型的X射线干涉仪系统。本文提出了一种用双透射光栅作为分束器的X射线干涉仪。在光学对准完成后，将进行软X射线干涉测量。

项目成果

N.Yamaguchi, C.Fujikawa, T.Hara: "Study of compact x-ray laser pumped by pulse-train laser"Surface Review and Letters. 9・1(印刷中). (2002)

N.Yamaguchi、C.Fujikawa、T.Hara：“脉冲序列激光器泵浦的紧凑型 X 射线激光的研究”Surface Review and Letters 9·1（印刷中）。

N.Yamaguchi, C.Fujikawa, T.Hara: "Study of compact x-ray laser pumped by pulse-train laser"Surface Review and Letters. 9(印刷中). (2002)

N.Yamaguchi、C.Fujikawa、T.Hara：“脉冲序列激光器泵浦的紧凑型 X 射线激光的研究”Surface Review and Letters 9（印刷中）。

N.Yamaguchi, Y.Okamoto, H.Yamaguchi, T.Hara: "Spatial coherence of x-ray laser from compact x-ray laser pumped by pulse-train laser"Proc.3rd Symposium on Advanced Photon Research. (印刷中). (2002)

N.Yamaguchi、Y.Okamoto、H.Yamaguchi、T.Hara：“脉冲序列激光器泵浦的紧凑型 X 射线激光器的空间相干性”Proc.第三届高级光子研究研讨会（正在出版）。 (2002)

N.Yamaguchi,C.Fujikawa,T.Ohchi,and T.Hara: "Dotted-Array Plasma Production by Using a Line-Focusing Lens System with Segmented Prism Array for Compact X-ray Laser Experiments"Jpn.J.Applied Physics. 39・9A. 5268-5272 (2000)

N. Yamaguchi、C. Fujikawa、T. Ohchi 和 T. Hara：“使用带有分段棱镜阵列的线聚焦透镜系统进行紧凑型 X 射线激光实验的点阵等离子体生产”Jpn。 39・9A。5268-5272（2000）

N. Yamaguchi, C. Fujikawa, and T. Hara: "X-ray Laser Experiments in Recombination Plasma with Double-Target Configuration Pumped by Pulse-Train Laser"Journal de Physique IV. 11. Pr-259-262 (2001)

N. Yamaguchi、C. Fujikawa 和 T. Hara：“脉冲序列激光泵浦的双靶结构复合等离子体中的 X 射线激光实验”Journal de Physique IV。