New injection and acceleration scheme of positrons in the laser-plasma bubble regime oleh Z. Y. Xu, C. F. Xiao, H. Y. Lu, R. H. Hu, J. Q. Yu, Z. Gong, Y. R. Shou, J. X. Liu, C. Z. Xie, S. Y. Chen, H. G. Lu, T. Q. Xu, R. X. Li, N. Hafz, S. Li, Z. Najmudin, P. P. Rajeev, D. Neely, X. Q. Yan