Understanding the anisotropic ion distributions within magnetotail dipolarizing flux bundles

Xuzhi Zhou, Peking University, School of Earth and Space Sciences, Beijing, China, Andrei Runov, University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States, Vassilis Angelopoulos, UCLA, Department of Earth, Planetary, and Space Sciences and Institute of Geophysics and Planetary Physics, Los Angeles, CA, United States and Joachim Birn, Los Alamos National Laboratory, Los Alamos, NM, United States