Author(s): W. T. Wang, W. T. Li, J. S. Liu, Z. J. Zhang, R. Qi, C. H. Yu, J. Q. Liu, M. Fang, Z. Y. Qin, C. Wang, Y. Xu, F. X. Wu, Y. X. Leng, R. X. Li, and Z. Z. Xu
Using a new two-stage acceleration scheme, where electron injection and seeding are controlled in different periods of the laser wakefield, high-quality tunable electron beams are produced with brightnesses close to those achieved in state-of-the-art linac drivers.

[Phys. Rev. Lett. 117, 124801] Published Fri Sep 16, 2016