[P-EM10] Dynamics of Magnetosphere and Ionosphere

[PEM10-P10] Relativistic electron microburst is a high-energy tail of pulsating aurora electrons: LAMP sounding rocket experiment and computer simulation

*三好 由純¹、浅村 和史²、細川 敬祐³、三谷 烈史²、滑川 拓²、齊藤 慎司⁴、坂野井 健⁵、能勢 正仁¹、高橋 一輝¹、尾林 佑哉¹、Lessard Marc⁶、Halford Alexa⁷、Shumko Mykhaylo⁷、Paschalidis N⁷、McHarg M¹²、Jaynes Alison⁹、Hampton Don⁸、Ledvina Vincenet⁸、Lynch Kristina¹⁰、Kim Hyomin¹¹ (1.名古屋大学宇宙地球環境研究所、2.宇宙航空研究開発機構、3.電気通信大学、4.情報通信研究機構、5.東北大学、6.ニューハンプシャー大学、7.NASA、8.UAF、9.アイオワ大学 、10.ダートマスカレッジ、11.NJIT、12.USAF)

キーワード：LAMPロケット実験、シミュレーション、脈動オーロラ

The LAMP sounding rocket was successfully launched on March 5, 2022, at the Poker Flat Research Range to directly measure precipitating electrons in the pulsating aurora and relativistic electron microburst. During this campaign, high-speed optical cameras were also in operation at PFRR, Venetie, and Fort Yukon. We successfully observed pulsating auroral patches by the onboard camera AIC, and significant electron bursts of precipitation ranging from a few keV to over 100 keV, as recorded by the EPLAS, ESST, and HEP instruments. This supports our hypothesis that the relativistic electron microburst is the high-energy tail of pulsating aurora, which are driven by chorus waves propagating along magnetic field lines (Miyoshi et al., 2020). In this presentation, we show the temporal variations of energetic electron precipitation for wide energy electrons and optical emissions from both ground and the LAMP rocket, and we compare these observations with a computer simulation of chorus wave-particle interactions.