Simulation study of positron production by picosecond laser-driven electronsYonghong Yan, Yuchi Wu, Xiaohui Zhang, Minghai Yu, Tiankui Zhang, Bin Zhu, Fang Tan, Yue Yang, Wei Fan, Feng Lu, Gang Li, Weimin Zhou, Leifeng Cao and Yuqiu GuEur. Phys. J. D, 73 9 (2019) 193DOI: https://doi.org/10.1140/epjd/e2019-90394-7