Japan Geoscience Union Meeting 2019

Presentation information

[E] Poster

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM13] Inner magnetosphere: Recent understanding and new insights

Wed. May 29, 2019 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Yusuke Ebihara(Research Institute for Sustainable Humanosphere, Kyoto University), Danny Summers(Memorial University of Newfoundland), Yoshizumi Miyoshi(Institute for Space-Earth Environmental Research, Nagoya University), Shinji Saito(Graduate School of Science, Nagoya University)

[PEM13-P28] Particle simulation for calibrating the HEP data onboard the ARASE satellite

*PARK INCHUN1, Yoshizumi Miyoshi1, Takefumi Mitani2, Tomoaki Hori1, Satoshi Kurita1, Mariko Teramoto1, Takeshi Takashima2, Nana Higashio3, Iku Shinohara2 (1.Nagoya University Institute for Space-Earth Environmental Research, 2.Japan Aerospace Exploration Agency Institute of Space and Astronautical Science , 3.Japan Aerospace Exploration Agency )

Keywords:ARASE, Geant4, HEP

Understanding the detailed characteristics of the HEP (High-Energy electron Experiment) instrument onboard the Arase satellite is crucial for data calibration. Due to difficulties of reproducing the severe radiation environment of the inner magnetosphere on the ground, computer simulation is the best method to understand instrument responses to the ambient radiation environment. Through Monte-Carlo simulations using the Geant4 tool, we have reconstructed the geometry of the HEP instrument and modeled the high-energy particle environment. Using the developed model, we have studied the efficiency of the detectors, the angular resolution, and the g-factors, which depend on the particle energy and the sensor channels. While the previous studies were based on a uni-direction simulation with electron pencil beams, this study adopted all the detector channels and energy bends of HEP thus resulting in more advanced simulations. Based on the results, we have made a new calibration table depending on the angle of incident particles. We have also estimated the g-factor which depends on the incident particle energy. The updated calibration table and g-factors are important for calibrating the HEP data as well as inter-calibrations with other particle instruments’ data.