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相关概念视频

X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

3.8K
X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are  scattered by the electron clouds around the sample atoms. The  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
3.8K
X-ray Crystallography02:18

X-ray Crystallography

23.8K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
23.8K

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Thermal correction method for accurate performance evaluation of micro-thermoelectric coolers.

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Correcting the energy-dependent asymmetry in low-energy muon spin rotation.

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相关实验视频

Updated: Jun 12, 2025

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
10:12

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

9.0K

在国家点火设施 (受邀) 开发时间解析的X射线衍射诊断 (受邀)

N E Palmer1, L R Benedetti1, C E Vennari1

  • 1Lawrence Livermore National Laboratory, Livermore, California 94550, USA.

The Review of scientific instruments
|September 17, 2024
PubMed
概括
此摘要是机器生成的。

新的X射线成像诊断被开发来测量在动态压缩下相位过渡时间尺度. 这些诊断使用封闭式混合CMOS传感器,并已改进,以提高数据质量和激光驱动实验的灵活性.

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Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Synthesis and Microdiffraction at Extreme Pressures and Temperatures

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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic

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相关实验视频

Last Updated: Jun 12, 2025

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
10:12

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

9.0K
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
07:26

Synthesis and Microdiffraction at Extreme Pressures and Temperatures

Published on: October 7, 2013

11.2K
Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
06:46

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic

Published on: August 25, 2016

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科学领域:

  • 材料科学 材料科学 材料科学
  • 高能量密度物理学 高能量密度物理学
  • 射线科学X射线科学X射线科学

背景情况:

  • 在动态压缩下测量相位过渡时间表对于材料科学至关重要.
  • 现有的方法在恶劣的实验环境和信号噪声比率中面临挑战.

研究的目的:

  • 设计和开发先进的X射线成像诊断,用于动态压缩实验的现场测量.
  • 克服环境挑战,提高X射线衍射数据质量.

主要方法:

  • 发展分阶段诊断,从一个示范平台开始 (Gated Diffraction Development Diagnostic). 发展分阶段诊断.
  • 实现一个灵活的仪器 (激光实验的灵活成像衍射诊断) 与多个ns-gated混合CMOS传感器.
  • 在恶劣环境中保护传感器免受碎片,电磁脉冲和激光照射的影响.

主要成果:

  • 在演示阶段成功保护传感器并获取可接受的衍射数据.
  • 开发了一种更雄心勃勃的仪器,能够在灵活的几何形状中对最多八个传感器进行测试.
  • 在国家点火设施 (NIF) 中,识别和解决与复杂性和数据质量相关的挑战的进展.

结论:

  • 阶段性开发方法有效地评估了风险,并解决了设计复杂X射线诊断的挑战.
  • 激光实验的灵活成像衍射诊断器为研究动态压缩提供了增强的能力.
  • 目前的工作重点是减少X射线背景和量化测量不确定性,以提高数据质量.