Spatial Distribution and Anisotropy of Energetic Particles Accelerated by Shock Waves: Focused Transport Model  

作　　者：ZUO Ping-Bing FENG Xue-Shang 左平兵;冯学尚(SIGMA Weather Group,State Key Laboratory of Space Weather,Center for Space Science and Applied Research,Chinese Academy of Sciences,Beijing 100190)

机构地区：[1]SIGMA Weather Group,State Key Laboratory of Space Weather,Center for Space Science and Applied Research,Chinese Academy of Sciences,Beijing 100190

出　　处：《Chinese Physics Letters》2013年第1期235-238,共4页中国物理快报（英文版）

基　　金：Partially supported by the National Basic Research Program of China under Grant No 2012CB825601;the Knowledge Innovation Program of the Chinese Academy of Sciences(KZZD-EW-01-4);the National Natural Science Foundation of China(41174152,41231068,41031066,40904048,40904049,41004082,and 41204127);the Specialized Research Fund for State Key Laboratories.

摘　　要：The focused transport equation(FTE)contains the necessary physics of shock acceleration but avoids the limitation of small pitch-angle anisotropy inherent in the cosmic ray transport equation.We present a focused transport model based on FTE to investigate the spatial distribution and anisotropy of energetic particles accelerated by shock waves from pickup ions.It is found that in the upstream of the shock,the accelerated particles are highly anisotropic,but in the downstream it is approximately isotropic.An intensity spike is formed across the shock.These simulation results are qualitatively consistent with the observations of the termination shock particles by two Voyager spacecraft in the vicinity of the termination shock.

关 键 词：equation. shock ANISOTROPY 

分 类 号：O35[理学—流体力学]