相关实验视频
Updated: Jun 29, 2025
10:52
Direct Imaging of Laser-driven Ultrafast Molecular Rotation
Published on: February 4, 2017
9.7K
激光唤醒场加速千安培电子束的电光3D快照
Kai Huang1,2, Zhan Jin3,4, Nobuhiko Nakanii5,3
1Kansai Institute for Photon Science (KPSI), National Institutes for Quantum Science and Technology (QST), Kyoto, Japan. huang.kai@qst.go.jp.
Light, science & applications
|April 7, 2024
概括
研究人员开发了一种新方法来测量激光唤醒场电子束的3D密度. 这种技术为先进的加速器应用提供了对粒子束质量的关键见解.
科学领域:
- 等离子体物理学的物理学
- 加速器物理学的物理学
- 颗粒束诊断 颗粒束诊断
背景情况:
- 激光唤醒场加速提供了高梯度和明亮的电子束.
- 三维 (3D) 密度对于评估电子束质量和应用至关重要.
- 在激光唤醒场加速中对3D电子束密度的实验测量一直缺乏.
研究的目的:
- 实验测量激光唤醒场电子束的3D密度.
- 开发一种方法来表征femtosecond,kilo-ampere电子束.
- 为了使光束传输线的3D密度监测成为可能.
主要方法:
- 同时的光学转换辐射成像和电光采样.
- 使用遗传算法重建详细的3D结构.
- 在等离子体外的电子束的电光3D快照.
主要成果:
- 实现了电子束的横向尺寸<30微米.
- 观察到一个多峰电流配置,主要峰值持续时间<10 fs,峰值电流>1 kA.
- 测量了最大的电子3D数密度为~ 9 × 10^21 m^-3.
结论:
- 展示了一种可行的方法,用于对 femtosecond,kilo-ampere电子束的3D密度监测.
- 开发的技术允许在光束传输线的任何位置进行3D束形状表征.
- 这一进步对于优化和利用激光唤醒场加速器在各种应用中至关重要.
相关概念视频
01:15Transmission Electron Microscopy
5.5K
In 1931, physicist Ernst Ruska—building on the idea that magnetic fields can direct an electron beam just as lenses can direct a beam of light in an optical microscope—developed the first prototype of the electron microscope. This development led to the development of the field of electron microscopy. In the transmission electron microscope (TEM), electrons are produced by a hot tungsten element and accelerated by a potential difference in an electron gun, which gives them up to 400...
5.5K
01:07Scanning Electron Microscopy
4.2K
A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
Fundamental Principles
Accelerated...
Fundamental Principles
Accelerated...
4.2K