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Perpendicular acceleration of near-equatorially mirroring protons by electromagnetic ion cyclotron (EMIC) waves

文献类型：期刊论文

作者Zhou, Su2; Cai YZ(蔡永志)1,3,4; Li, Shunli2; Wu, Zongxian2; Hou, Ying2
刊名ADVANCES IN SPACE RESEARCH
出版日期2025-11-01
卷号76期号:9页码:5658-5671
关键词Ring current protons Near-equatorially mirroring protons EMIC waves Test-particle simulation Perpendicular acceleration Nonlinear trapping
ISSN号0273-1177
DOI10.1016/j.asr.2025.08.018
产权排序第2完成单位
文献子类Article
英文摘要The terrestrial ring current protons can resonate with electromagnetic ion cyclotron (EMIC) waves; however, the nonlinear interaction between near-equatorially mirroring protons (with equatorial pitch angle aeq above 80 degrees) and EMIC waves remains insufficiently explored. This study conducted a test-particle simulation and found that near-equatorially mirroring protons exhibit strong nonlinear resonance induced by intense H+ band EMIC waves with an amplitude of 3.0 nT. Nonlinear phase trapping causes these protons to undergo sustained resonance, leading to significant enhancement in the protons' perpendicular velocity. However, the parallel velocity does not experience effective acceleration and instead exhibits a periodic oscillation. The perpendicular acceleration transports energetic protons to higher pitch angles, heating them to higher energies. Even for moderately intense EMIC waves above 0.5 nT, the perpendicular acceleration is still significant. As the wave amplitude increases, the nonlinear phase trapping effect intensifies and produces more pronounced acceleration. This study provides insight into the pitch angle distribution (PAD) evolution of ring current protons, particularly the formation of trapped PAD near aeq = 90 degrees. These simulation results contribute to a deeper understanding of the ring current dynamics and proton energization during geomagnetic storms. (c) 2025 COSPAR. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
学科主题物理学 ; 等离子体物理学 ; 地球科学 ; 空间物理学
URL标识查看原文
出版地125 London Wall, London, ENGLAND
WOS关键词PITCH-ANGLE DISTRIBUTIONS ; RADIATION BELT ELECTRONS ; RING CURRENT PROTONS ; COHERENT VLF WAVES ; NONLINEAR-INTERACTIONS ; ENERGETIC ELECTRONS ; MAGNETIC-FIELD ; SCATTERING ; DRIVEN ; STORMS
资助项目Innovation Talents Project of Guizhou Province (ZKHT-GCC); Scientific Research Funds of Guiyang University; National Natural Science Foundation of China (NSFC)[12303054]; National Key Research and Development Program of China[2024YFA1611603]; Yunnan Fundamental Research Projects[202401AU070063]; Yunnan Fundamental Research Projects[202501AS070078]; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]
WOS研究方向Engineering ; Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:001590672500031
出版者ELSEVIER SCI LTD
资助机构Innovation Talents Project of Guizhou Province (ZKHT-GCC)[[2023] 003] ; Scientific Research Funds of Guiyang University[GYU-KY-[2025]] ; National Natural Science Foundation of China (NSFC)[12303054] ; National Key Research and Development Program of China[2024YFA1611603] ; Yunnan Fundamental Research Projects[202401AU070063, 202501AS070078] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28652]  
专题云南天文台_丽江天文观测站（南方基地）
通讯作者Zhou, Su
作者单位1.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, China
2.School of Science, Guiyang University, Guiyang, China;
3.Yunnan Observatories, Chinese Academy of Sciences, Kunming, China;
4.International Centre of Supernovae, Yunnan Key Laboratory, Kunming, China;
推荐引用方式
GB/T 7714		 Zhou, Su,Cai YZ,Li, Shunli,et al. Perpendicular acceleration of near-equatorially mirroring protons by electromagnetic ion cyclotron (EMIC) waves[J]. ADVANCES IN SPACE RESEARCH,2025,76(9):5658-5671.
APA Zhou, Su,蔡永志,Li, Shunli,Wu, Zongxian,&Hou, Ying.(2025).Perpendicular acceleration of near-equatorially mirroring protons by electromagnetic ion cyclotron (EMIC) waves.ADVANCES IN SPACE RESEARCH,76(9),5658-5671.
MLA Zhou, Su,et al."Perpendicular acceleration of near-equatorially mirroring protons by electromagnetic ion cyclotron (EMIC) waves".ADVANCES IN SPACE RESEARCH 76.9(2025):5658-5671.

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