K-9M-41号機による非線形波動-波動及び波動-粒子相互作用ロケット実験

概要

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Controlled experiments on the nonlinear wave-wave and wave-particle interactions in the ionospheric plasma were performed by the Japanese sounding rocket K-9M-41. Ion acoustic waves excited by large amplitude electron plasma wave were found in the VLF wide band spectrograms whose spectra are very similar to those obtained by the K-9M-35 nonlinear wave-wave interaction experiment. In addition to these, banded LHR emissions were observed throughout the experimental period which, at a certain altitude, triggered 'risers' whose spectrum is very similar to that of ASE. After the electron beam with energy lower than 3 eV is ejected, periodic U-shaped discrete emissions were observed. The frequency of these emissions is lower than LHR frequency and decreases as the beam energy is increased. Generation mechanism of the U-shaped discrete emissions cannot be explained by any linear instability due to hpamwavp intprartinn
宇宙航空研究開発機構の論文