日本地球惑星科学連合2019年大会

講演情報

[E] ポスター発表

セッション記号 P (宇宙惑星科学) » P-EM 太陽地球系科学・宇宙電磁気学・宇宙環境

[P-EM13] 内部磁気圏

2019年5月29日(水) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:海老原 祐輔(京都大学生存圏研究所)、Danny Summers(Memorial University of Newfoundland)、三好 由純(名古屋大学宇宙地球環境研究所)、齊藤 慎司(名古屋大学 大学院理学研究科)

[PEM13-P30] Validation of High-energy electron detector simulator for the HEP instruments onboard Arase

*三谷 烈史1PARK INCHUN2堀 智昭2滑川 拓1,3浅村 和史1高島 健1笠原 慧3栗田 怜2寺本 万里子2東尾 奈々1三好 由純2篠原 育1 (1.宇宙航空研究開発機構宇宙科学研究所、2.名古屋大学 宇宙地球環境研究所、3.東京大学)

キーワード:高エネルギー電子、あらせ、Geant4

The high-energy electron experiments (HEP) onboard the Arase satellite detects 70 keV-2 MeV electrons and generates a three-dimensional velocity distribution for these electrons in every period of the satellite's rotation. Electrons are detected by two instruments, namely, HEP-L and HEP-H, which differ in their geometric factor (G-factor) and range of energies they detect. HEP-L detects 70 keV–1 MeV electrons and its G-factor is 9.3 ×10−4 cm2 sr at maximum, while HEP-H observes 0.7 MeV–2 MeV electrons and its G-factor is 9.3 ×10-3 cm2 sr at maximum. The instruments utilize silicon strip detectors and application-specific integrated circuits to readout the incident charge signal from each strip.

In order to deduce the distribution of incident electrons from the direction and energy detections in orbit, we have developed a detector simulator using the Geant4 toolkit. Especially contamination due to high energy particles must be considered quantitatively. We have also been working on electron beam experiments using HEP detector modules which are almost the same as the flight model in order to compare detailed simulations and experimental data.

We will present a comparison between results from the electron beam experiments and those from the detector simulator. And we will discuss its influence on the interpretation of the observational data obtained in orbit.