[P-CG19] 惑星大気圏・電磁圏

[PCG19-P05] エンケラドス衛星周辺におけるイオン化反応による電子エネルギー消失に関するテスト粒子シミュレーション: エネルギー依存イオン化衝突断面積のモデル

*田所 裕康¹、加藤 雄人² (1.千葉経済大学、2.東北大学)

キーワード：テスト粒子シミュレーション、土星、エンケラドス、電子中性粒子衝突、イオン化衝突、モンテカルロ法

Saturn’s inner magnetosphere is dominated by water group neutrals (H₂O, OH, and O) originated from Enceladus. Previous studies showed that the neutrals contribute to loss processes of plasma in the inner magnetosphere. However, much less is known about a quantitative study of the electron loss process due to electron-neutral collisions. Tadokoro and Katoh [2014] estimated the loss rate of 1keV electrons into the loss cone through pitch angle scattering due to the electron elastic collisions with neutral H₂O around Enceladus. Ionization cross sections in the electron energy above keV is greater than elastic collision cross sections. Here, we focus on 1keV electron energy loss by the ionization with neutral H₂O in this study, conducting one dimensional test-particle simulation. We show the 1keV electron energy loss due to ionization process including the effect of energy loss by secondary electrons. We also discuss a model for single differential cross sections.