Polytropic index of ions in the Earth magnetosheath

Xuexia Pang1,2, Jinbin Cao3 and Zechao Deng2, (1)No. 180 of Wusi East Road in Baoding, College of Physics Science and Technology, Hebei University, Baoding, China, (2)Hebei University, College of Physics Science and Technology, Baoding, China, (3)Beihang University, Beijing, China