Optimization and first applications of a compact, high-repetition rate, ultrashort hard-x-ray and electron source based on the combination of femtosecond lasers with an x-ray diode

基于飞秒激光器与 X 射线二极管组合的紧凑型、高重复率、超短硬 X 射线和电子源的优化和首次应用

• 批准号: 5372940
• 负责人: Professor Dr. Boris Chichkov, Ph.D.
• 金额: --
• 依托单位: Institut für Quantenoptik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2005-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5372940?language=en
• 关键词: Optimization; first; applications; compact; repetition

The primary aim of this research project are investigations of possibilities to generate ultrashort x-ray pulses (with a pulse duration below 10 ps) by combining femtosecond lasers with a specially designed x-ray tube. In a first step, ultrashort electron pulses will be generated via femtosecond photoemission from a photocathode. Then, the electron pulses will be accelerated towards a high-Z target material by applying an external electric field over a short distance. Hard-x-rays will be produced via Bremsstrahlung and characteristic line emission. In this project measurements and optimization of the hard-x-ray pulse duration using advanced streak camera and pulse shaping techniques will be performed. These investigations will allow to develop a new, compact, high-repetition rate x-ray source for studies of ultrafast transient processes in condensed matter. This femtosecond laser-driven x-ray source will provide an important alternative to the existing laboratory x-ray sources and will eventually be used for time-resolved studies of transient phenomena in condensed matter.

该研究项目的主要目的是通过将飞秒激光器与特殊设计的x射线管相结合，研究产生超短x射线脉冲（脉冲持续时间低于10ps）的可能性。在第一步中，超短电子脉冲将通过飞秒光电阴极产生。然后，通过在短距离内施加外电场，将电子脉冲加速到高z目标材料。硬x射线将通过轫致辐射和特征线发射产生。在这个项目中，将使用先进的条纹相机和脉冲整形技术测量和优化硬x射线脉冲持续时间。这些研究将允许开发一种新的、紧凑的、高重复率的x射线源，用于研究凝聚态物质中的超快瞬态过程。这种飞秒激光驱动的x射线源将为现有的实验室x射线源提供一个重要的替代方案，并最终将用于凝聚态物质瞬态现象的时间分辨研究。