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相关概念视频

Reflection of Waves01:07

Reflection of Waves

When a wave travels from one medium to another, it gets reflected at the boundary of the second medium. A common example of this is when a person yells at a distance from a cliff and hears the echo of their voice. The sound waves (longitudinal waves) traveling in the air are reflected from the bounding cliff. Similarly, flipping one end of a string whose other end is tied to a wall causes a pulse (transverse wave) to travel through the string, which gets reflected upon reaching the wall. In...

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在圆形的镜子外上检测软X射线波面.

Christoph Braig1, Jürgen Probst2, Heike Löchel2

  • 1Institute of Applied Photonics e.V., Rudower Chaussee 29/31, 12489 Berlin, Germany.

Journal of synchrotron radiation
|June 6, 2024
PubMed
概括

一种新的现场方法使用X射线波面传感来描述光学元件. 这种技术准确地测量波面误差,以改善X射线镜面对齐和校正器设计.

关键词:
的X射线光学.圆形镜子的镜子是圆形的重点重建重建重建的重点倾斜误差 倾斜误差 倾斜误差 倾斜误差 倾斜误差 倾斜误差表面表征表征的表征表征.波浪前线传感 波浪前线传感

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科学领域:

  • 光学和X射线科学 视觉和X射线科学
  • 计量学和仪器仪表技术

背景情况:

  • 在柔软的X射线领域描述旋转对称的光学元件需要可靠的现场方法.
  • 精确的波纹传感对于高分辨率的X射线科学应用至关重要.

研究的目的:

  • 开发和报告一项用于软X射线光学的新型现场波浪前线传感技术.
  • 为了能够精确地描述像圆形镜子外这样的光学元素.
  • 为了促进X射线镜子的改进对齐和波面校正器的设计.

主要方法:

  • 用微型,电子激发的光源 (碳Kα) 对镜像样本进行辐射.
  • 使用CCD摄像机在焦点附近的两个位置记录3D强度分布.
  • 实现基于强度传输方程的射线追踪代码,从强度梯度中检索相位.

主要成果:

  • 用RMS获得的波面错误图. 的值为 ±10.9λ0 ,峰值到谷值为 ±31.3λ0.0 .
  • 重建的焦点直径为38.4μm,与实验观测 (39.4μm FWHM) 密切匹配.
  • 圆形图形和斜率误差的表征为±1.14μm和±8.8弧秒 (r.m.s. ),分别是 () 和 ().

结论:

  • 在现场开发的方法在软X射线领域提供了可靠的波面传感.
  • 该技术能够准确地描述光学元件的误差和焦点属性.
  • 这些发现支持精确对准X射线镜子,并为先进的X射线科学设计波面校正器.