Data Analysis of the High-Energy Ion Tail in Earth's Plasmasphere

Space;Plasmasphere;Engineering (General);Engineering;Atmospheric, Oceanic & Space Science

Smith, LoisZou, Shasha ;

University of Michigan

关键词: Space;    Plasmasphere;    Engineering (General);    Engineering;    Atmospheric, Oceanic & Space Science;   

Others  :  https://deepblue.lib.umich.edu/bitstream/handle/2027.42/135838/loisks_1.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

The Van Allen Probes Mission has provided an opportunity to examine the ion high-energy (1-10 eV) tail of the cold plasmasphere and it;;s interaction with plasma waves. We statistically analyze from February 2013 to April 2015 of Van Allen Probes Helium Oxygen Proton Electron (HOPE) data, looking at quiet times with a Kp index of less than 3. We investigate the high-energy population of the plasmasphere, which consists of ions at energies between 1 and 10 eV and contains approximately 5% of total plasmaspheric density. Both the fluxes and partial plasma densities over this energy range show H+ is depleted the most in the post-midnight sector (1-4 magnetic local time). We determine wave-particle interactions cause the dayside 1-10 eV H+ population to be suprathermally heated on the dayside which depletes across the nightside and results in a minimum in the post-midnight sector.