Relativistic electron dynamics produced by azimuthally localized poloidal mode ULF waves: Boomerang-shaped pitch angle evolutions

Yixin Hao1, Qiugang Zong1, Xuzhi Zhou1, Robert Rankin2, Xingran Chen1, Ying Liu1, Suiyan Fu3, Harlan E. Spence4, J Bernard Blake5 and Geoffrey D Reeves6, (1)Peking University, School of Earth and Space Sciences, Beijing, China, (2)University of Alberta, Department of Physics, Edmonton, AB, Canada, (3)Peking Univ, Beijing, China, (4)Solar System Exploration Research Virtual Institute, NASA Ames Research Center, Moffett Field, CA, United States, (5)Aerospace Corporation, Los Angeles, CA, United States, (6)Los Alamos National Laboratory, Los Alamos, NM, United States