Confinement of proton beam in a magnetic mirror Fang-Ping Wang, Heng Zhang, Xiao-Ying Zhao, Zhong-Zheng Li, Wen-Shan Duan and Lei Yang Eur. Phys. J. D, 73 6 (2019) 130 Published online: 25 June 2019 DOI: 10.1140/epjd/e2019-90587-0