Near-microcoulomb multi-MeV electrons generation in laser-driven self-formed plasma channel

作者：Yang, Y.; Jiao, J.; Tian, C.; Wu, Y.; Dong, K.; Zhou, W.; Gu, Y.; Zhao, Z.^*

来源：Laser and Particle Beams, 2017, 35(3): 476-482.

DOI：10.1017/S0263034617000490

• High-charge electron
• Near-critical density
• Plasma channel
• Direct laser acceleration

The origin and characteristics of near-microcoulomb multi-MeV electrons accelerated by short pulse lasers interacting with near-critical density plasma in self-formed channels are studied using three-dimensional particle-in-cell simulations. According to the analysis on interaction phenomena and electron dynamics, the dominant mechanism turns out to be direct laser acceleration, which ensures the outstanding energy coupling. Additionally, self-channeling is found to be a decisive factor for the acceleration performance, as electrons obtain ultra-high energy through betatron resonance inside the channels. In our findings, by using a relativistic short laser pulse and near-critical plasma, a large amount of energetic electrons can be generated, presenting a promising and accessible route to ultraintense, high-spatial-resolution radiation pulses.

• 出版日期2017-9
• 单位中国工程物理研究院激光聚变研究中心; 中国工程物理研究院; 上海交通大学