講演情報
[PEM12-P10]Characteristics of the magnetometer (MAG) for sounding rocket experiment (S-310-46) to observe sporadic E layer
*松岡 彩子1、村田 直史2、小嶋 浩嗣3、栗田 怜3、東村 敢4、奥田 隆一5、齊藤 昭則5 (1.京都大学 理学研究科 地磁気世界資料解析センター、2.宇宙航空研究開発機構 環境試験技術ユニット、3.京都大学 生存圏研究所、4.京都大学 工学研究科、5.京都大学 理学研究科 地球惑星科学専攻)
キーワード：
磁力計、スポラディックＥ層、電離層
The sporadic E layer has been studied for long time but many things about the physical processes of its formation and extinction remain unclear. We are planning to launch the S-310-46 sounding rocket to make in-situ and comprehensive observation of the sporadic E layer, and advance our understanding of its electromagnetic signature. Precise measurement of the magnetic field and its variation is necessary to derive the electric currents flowing inside and in the vicinity of the sporadic E layer, and study the relationship with the electric fields, charged particles, and neutral particles. We developed a precision vector magnetometer (MAG) for the S-310-46 experiment. MAG is a fundamental-mode orthogonal fluxgate magnetometer (FM-OFG), in which ultra-fine amorphous wire is used as the sensor core. It has the advantage of being small, lightweight and power-saving, compared with the conventional parallel fluxgate magnetometer. The first FM-OFG for space use was developed for Martian Moons eXploration (MMX), the project to explore Martian satellites, and succeeded by that for Comet Interceptor, the project to encounter a primordial comet. Although S-310-46 started later than these two projects, it is planned to be launched in 2024 owing to the short-term development, and will be the first opportunity to demonstrate FM-OFG in space. In addition, for the S-310-46 experiment, we applied Application Specific Integrated Circuit (ASIC) technology to reduce the electrical circuit size and power consumption. We finished the manufacturing of the flight model in 2023 and conducted the performance test, environment test and calibration. We will report the performance and characteristics of the MAG flight model.