[P-CG19] 惑星大気圏・電磁圏

[PCG19-P08] エンケラドス衛星起源H₂Oとのイオン化反応による1keV電子のエネルギー消失に関する数値計算

*田所 裕康¹、加藤 雄人² (1.駿河台大学、2.東北大学大学院理学研究科)

キーワード：電子エネルギー消失、イオン化反応、土星、エンケラドス、数値計算

Saturn’s inner magnetosphere is dominated by water group neutrals (H₂O, OH, and O) originated from Enceladus. Previous studies suggested that the neutrals contribute to loss processes of plasma in the inner magnetosphere. However, little has been reported on a quantitative study of the electron loss process due to electron-neutral collisions. Tadokoro and Katoh [2014] focused on the loss process of 1 keV electron through the elastic collision with neutral H₂O around Enceladus. With regard to above several hundred eV, ionization cross section for electron electron-H₂O collision is greater than elastic collision. We focus on 1keV electron energy loss by the ionization with neutral H₂O in this study. Conducting one dimensional test-particle simulation, we calculate the electron ionization collision. We show the 1keV electron energy loss due to ionization process.