Cross-Energy Couplings from Magnetosonic Waves to Electromagnetic Ion Cyclotron Waves through Cold Ion Heating inside the Plasmasphere

Using a novel wave-particle interaction analysis, we show observational evidence of energy transfer from fast magnetosonic waves (MSWs) to low-energy protons in the magnetosphere. The analysis clearly indicates that the transferred proton energies are further converted to excite electromagnetic ion...

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Bibliographic Details
Published in:Physical review letters 2021-12, Vol.127 (24), p.245101-245101, Article 245101
Main Authors: Asamura, Kazushi, Shoji, Masafumi, Miyoshi, Yoshizumi, Kasahara, Yoshiya, Kasaba, Yasumasa, Kumamoto, Atsushi, Tsuchiya, Fuminori, Matsuda, Shoya, Matsuoka, Ayako, Teramoto, Mariko, Kazama, Yoichi, Shinohara, Iku
Format: Article
Language:English
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Summary:Using a novel wave-particle interaction analysis, we show observational evidence of energy transfer from fast magnetosonic waves (MSWs) to low-energy protons in the magnetosphere. The analysis clearly indicates that the transferred proton energies are further converted to excite electromagnetic ion cyclotron waves. Since MSWs are excited by hot ions, cross-energy coupling of ions occurs through MSWs. The result also suggests a new energy transfer path of exciting electromagnetic ion cyclotron waves in the magnetosphere, and a complex interplay between various wave modes and particle populations.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.127.245101