Confinement of proton beam in a magnetic mirrorFang-Ping Wang, Heng Zhang, Xiao-Ying Zhao, Zhong-Zheng Li, Wen-Shan Duan and Lei YangEur. Phys. J. D, 73 6 (2019) 130DOI: https://doi.org/10.1140/epjd/e2019-90587-0