Fundamental research on low-loss X-ray fibers and high performance X-ray optical device.

低损耗X射线光纤及高性能X射线光学器件基础研究。

• 批准号: 07455150
• 负责人: MIYAZAKI Yasumitsu
• 金额: $ 4.35万
• 依托单位: Toyohashi University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455150/
• 关键词: Reflection and Scattering Characteristics of X-rays; Refractive Index Distribution; X-ray Multi-layr Mirror; X-ray Shield; Curved X-ray Focusing Waveguide; X-ray Fibers; X-ray Focusing Device; Tapered Waveguide Probe; X線全反射; 多層膜構造; 曲がり導波路; X線機能

1. Assuming atom to be a perfect conducting cylinder, we analyzed reflection and scattering characteristics of X-rays at the atomic level, using BEM.Assuming a group of atoms within the crystal to be a dielectric cylinder, we analyzed transmission and scattering characteristics of X-rays incident on the crystal and were able to show the scattering intensity with respect to the array of atoms.2. Considering the motion of electrons within the atom, we could analyze X-ray scattering of a single atom using an inhomogeneous refractive index scattering model. Energy level of electron affected by X-rays is used as a parameter in this model. Strong correlation between electrons excited due to X-rays and index distribution, and also the correlation of results of X-ray intensity distribution analysis with the index distribution within the atom were confirmed. This analysis for a single atom was extended to the analysis multiple atom models.3. In addition to Si/Mo, Pt which had been used for this … More research as materials of the X-ray multi-layr mirror, we chose Ag/La and Rh/Ce and explored the dependence of wave length, number of layrs and incident angle. Assuming the incident angle to be near critical angles as in fiber transmission, we optimized the reflectivity, which resulted in good reflectivity characteristics.4. In the research of X-ray shield, by applying the wave absorber used in microwave region to a multi-layr structure we analyzed the characteristics in the region of X-rays. As a result, as a feature of the multi-layr with gradient type refractive index, we could see that absorption efficiency could be increased in order to reduce reflection and transmission.5. Total refraction and transmission at the near critical angle were analyzed. The dependence of the medium constants and the change due to spatial spectrum were examined. Propagation characteristics at the curvature were analyzed using a curved X-ray focusing waveguide, and mode conversion and spreading of beam spot of this model were investigated. As a result we could gain a fundamental knowledge of an X-ray waveguide and the propagation characteristics.6. According to the theoretical results, focusing of X-rays in graded-index type waveguide was understood. Focusing of a gauss beam in a more realistic model with loss at the core was also explored. In addition, electric field distribution inside and outside of tapered waveguide probe, with an X-ray plane wave input, was analyzed using FEM and BEM.The focusing of the X-ray plane wave was confirmed. Less

1. 假设原子是一个完美的导电圆柱体，我们利用边界元法在原子水平上分析了X射线的反射和散射特性。假设晶体内的一组原子是一个介电圆柱体，我们分析了入射到晶体上的X射线的透射和散射特性，并能够显示相对于原子阵列的散射强度。2.考虑到原子内电子的运动，我们可以使用非均匀折射率散射模型来分析单个原子的 X 射线散射。该模型使用受 X 射线影响的电子能级作为参数。证实了X射线激发的电子与折射率分布之间的强相关性，以及X射线强度分布分析结果与原子内的折射率分布的相关性。这种对单原子的分析扩展到了多原子模型的分析。 3．除了本研究中使用的 Si/Mo、Pt 作为 X 射线多层镜的材料之外，我们还选择了 Ag/La 和 Rh/Ce，并探讨了波长、层数和入射角的依赖性。假设入射角接近光纤传输的临界角，我们优化了反射率，从而获得了良好的反射率特性。 4．在X射线屏蔽体的研究中，将微波区域的吸波体应用到多层结构中，分析了X射线区域的特性。由此可见，梯度型折射率多层膜的一个特点是可以提高吸收效率，从而减少反射和透射。 5．分析了近临界角处的总折射和透射。检查了介质常数的依赖性和空间谱引起的变化。利用弯曲X射线聚焦波导分析了曲率处的传播特性，并研究了该模型的模式转换和束斑扩展。由此我们可以获得X射线波导及其传播特性的基本知识。6．根据理论结果，了解了X射线在渐变折射率型波导中的聚焦。还探讨了以损耗为核心的更真实模型中高斯光束的聚焦。此外，利用有限元法和边界元法对输入X射线平面波的锥形波导探头内外的电场分布进行了分析，证实了X射线平面波的聚焦。较少的

项目成果

Y.Miyazaki: "Guided Wave Solid State Laser and Opical Amplifier in Ultrafast and Ultraparallel Optoelectronics" Jone Wiley & Sons,U.K., 17 (1995)

Y.Miyazaki：“超快和超并行光电子学中的导波固态激光器和光放大器”Jone Wiley

Y.Miyazaki: "Electromagnetic Field Analysis of Ootical Function Devices Using Channel Waveguides" Proc.of OFSET'95, Tianjin, China. 98-104 (1995)

Y.Miyazaki：“使用通道波导的耳功能装置的电磁场分析”OFSET95 论文集，中国天津。

K.Manabe, Y.Miyazaki: "A 3-D Boundary Element Analysis of EM Wave Scattering by a Perfectly Conducting Body with Vertexes" Proc.of OFSET'95, Tianjin, China. 32-37 (1995)

K.Manabe、Y.Miyazaki：“具有顶点的完美传导体对电磁波散射的 3-D 边界元分析”，OFSET95 论文集，中国天津。

T.Masuda, Y.Miyazaki: "Analysis of Near Electromagnetic Field by a Conduction Elliptic Cylinder near a Ground Plane" The Institute of Electrical Engineers of Japan. EMT95-95. 49-55 (1995)

T.Masuda、Y.Miyazaki：“地平面附近传导椭圆柱的近电磁场分析”日本电气工程师学会。

Y.Miyazaki, T.Okuyama: "Electromagnetic Analysis of X-ray Focussing Devices Using Beam Propagation Method" Proc of ISAP'96, Chiba. E-10. 65-660 (1996)

Y.Miyazaki、T.Okuyama：“使用光束传播方法对 X 射线聚焦装置进行电磁分析”Proc of ISAP96，千叶。