Generation and Acceleration of GeVelectrons using Ultra-intense Laser

本项目的目的是利用超强激光激发气体喷射等离子体中的大振幅自调制尾流场，然后将电子加速到100 MeV以上。因此，我们构建了一个超强激光系统和气体喷射系统。我们现在以0.4ps的脉冲宽度提供18焦耳的目标能量，导致6 × 1018W/cm^2。我们还研制了激光同步脉冲功率机，在1.2ns的jittel内得到了1.1-2.6 MeV的电子同步到YAG激光；通过向气体喷射等离子体中注入超强激光，我们同时观察到了前向拉曼散射和侧向拉曼散射。根据这些信号，我们估计等离子体波在密度扰动下的振幅为35%，纵向场为lOOGV/m。数据表明电子加速度超过100兆电子伏。现在我们正在测量加速电子的能谱，用的是磁性分析电子能谱仪。

The purpose of this project is to excite large amplitude self-modulated wakefield in a gas jet plasma using an ultra-intense laser and then to accelerate electrons to more than 100 MeV.So that we have constructed an ultra- intense laser system and gas jet system.We now deliver 18 Joule on target energy in 0.4ps pulse width, leading to 6x 1018W/cm^2.We also developed a laser-synchronized pulse power machine, from which we can get 1.1-2.6 MeV electrons synchronized to A YAG laser within 1.2ns jittel ;By injecting the Ultra-intense laser into the gas jet plasma, we observed both the forward Raman scattering and the side scattering. From these signals, we estimated that the amplitude of the plasma wave is 35% in density perturbation and the longitudinal field is lOOGV/m. The data suggests the electron acceleration to more than 100 MeV.Now we are measuring the energy spectrum of the accelerated electrons using a magnetically analyzing electron spectrometer.