相关实验视频

Updated: Jul 5, 2025

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

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

Published on: June 19, 2018

时间解析的X射线衍射诊断开发,用于国家点火设施

K Werellapatha¹, N E Palmer¹, M G Gorman¹

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

The Review of scientific instruments

|January 18, 2024

概括

一个新的实验平台在激光驱动的压缩实验中捕捉了四个X射线衍射. 这一进步使国家点火设施在极端动态压力下对材料进行了详细的研究.

科学领域:

* 物理学物理
* 材料科学材料科学
* 工程 * 工程师 *

背景情况:

* 了解极端条件下的材料行为,例如激光产生的高压,对于各种科学和工程应用至关重要.
*动态压缩实验需要复杂的诊断来捕捉短暂的材料状态.

研究的目的:

*开发和演示一个实验平台,在激光驱动的动态压缩过程中收集时间解析的X射线衍射 (XRD) 数据.
* 允许在极端压力下对材料结构进行现场测量.

主要方法:

* 开发具有超快传感器的诊断成像仪 (集成时间为2ns).
* 构建一个定制的目标组件,用于样品支持和图像屏蔽.
*使用激光生成的等离子体生成一个准单色的X射线源 (10n持续时间).

主要成果:

*成功收集了四个XRD数据,沿着一个单一的视线.
*使用压缩到150 GPa的 (Pb) 坡道来展示平台的性能.
*采集了由 (Ge) X射线源照射的衍射数据,该X射线源在10.25 keV时产生约7 × 10^11 photons/ns.

结论:

*开发的平台为研究动态材料压缩提供了新的能力.
* 结果表明,在极端压力下获得时间解析结构信息的可行性.

更多相关视频

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

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

Published on: August 25, 2016

$Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction$ 10:36

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction

Published on: May 20, 2018

相关概念视频

X-ray Crystallography

X-ray Crystallography

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...

$X-ray Diffraction of Biological Samples$ 01:10

X-ray Diffraction of Biological Samples

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...