[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

*Yoshizumi Miyoshi¹, Kazushi Asamura², Keisuke Hosokawa³, Takefumi Mitani², Taku Namekawa², Shinji Saito⁴, Takeshi Sakanoi⁵, Masahito Nose¹, Kazuteru Takahashi¹, Yuya Obayashi¹, Marc Lessard⁶, Alexa Jean Halford⁷, Mykhaylo Shumko⁷, N Paschalidis⁷, M McHarg¹², Alison Jaynes⁹, Don Hampton⁸, Vincenet Ledvina⁸, Kristina Lynch¹⁰, Hyomin Kim¹¹ (1.Institute for Space-Earth Environmental Research, Nagoya University, 2.JAXA, 3.UEC, 4.NICT, 5.Tohoku University, 6.UNH, US, 7.NASA, 8.UAF, 9.U. Iowa, 10.Dartmouth College, 11.NJIT, 12.USAF)

Keywords:LAMP sounding rocket exepriment, Simulation, pulsating aurora

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.