超短脉冲强激光驱动固体电子束发射研究

The development of ultrashort intense laser technology promote man to study the strong field high density physics.Especially the electron beam source from the interaction between the high field laser and plasma, which has nowadays become the hot issues in scientific research，and can be applied in many fields such as material and biology detecting，fast ignition，particle physics. The proposal of electron emission at locked phases from laser-driven surface plasmas wave and the quasi-monoenergytic electron beam reveal a new method of controlling electron beam emission，which shows the potential in electron diffraction. But control of electron beam requires further investigation of plasmas density and structure. In this project we propose to manipulate laser-driven solid high density plasma to emit electron beam；to control the electron beam by changing the laser and plasma parameters; to study generation of the electron beam and electron beam-slitting; to develop a new ultrafast electron pulse emitting source and study the diffraction image of the crystal using the electron diffraction device inicially.Our research mainly relies on physics experiment，and Particle In Cell simulation and analysis theory.

超短超强激光技术的发展极大地促进了人类对强场高能密度物理的研究，特别是强场激光与等离子体作用中产生的电子束源，已成为当前科学研究的热点问题，在材料生物探测，激光快点火，粒子物理等领域有重要应用。激光驱动等离子体波锁相电子发射机制的提出及准单能电子束的发现揭示了控制电子束发射的新途径，实验获得的电子束源具备了在电子衍射成像领域应用的潜质。但电子束有效的控制仍需要进一步对等离子体密度及结构等参数深入研究。本项目拟利用激光驱动固体高密度等离子体发射电子束，通过改变激光和等离子体参数实现对电子束的操控，研究电子束及束斑分裂结构的产生机理。发展一种新型的超快电子脉冲发射源，初步搭建电子衍射成像装置并对晶体成像。本项目研究手段以物理实验为主，Particle In Cell和解析理论为辅。

超短超强激光技术的发展极大地促进了人类对强场高能密度物理的研究，特别是强场激光与等离子体作用中产生的电子束源，已成为当前科学研究的热点问题，在材料生物探测，激光快点火，粒子物理等领域有重要应用。激光驱动等离子体波锁相电子发射机制的提出及准单能电子束的发现揭示了控制电子束发射的新途径，实验获得的电子束源具备了在电子衍射成像领域应用的潜质。但电子束有效的控制仍需要进一步对等离子体密度及结构等参数深入研究。本项目拟利用激光驱动固体高密度等离子体发射电子束，通过改变激光和等离子体参数实现对电子束的操控，研究电子束产生机理。发展一种新型的超快电子脉冲发射源，初步搭建电子衍射成像装置并对晶体成像。