Observation of Two Layers Spectrum Formed by Simultaneous H+ and He+ Interactions with EMIC Waves

Observation of Two Layers Spectrum Formed by Simultaneous H+ and He+ Interactions with EMIC Waves | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Observation of Two Layers Spectrum Formed by Simultaneous H + and He + Interactions with EMIC Waves Heng Zhang, Kang Zhou, Bin Wen Ge, Binbin Tang, Wenya Li, Chong Le Zhang, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5281050/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract In a collisionless plasma environment, wave-particle interaction is an important process that enables efficient energy exchange between particles and phase-coherent waves. We first discovered two layers bridge-like arcs structure in the energy spectrum formed by the simultaneous anomalous resonance interaction of Electromagnetic ion cyclotron waves with protons and He+ by Magnetospheric Multiscale mission observations. Meanwhile, our analysis results illustrate that the existence of distinct energy conversion between particles and Electromagnetic ion cyclotron waves by using the Wave-Particle Interaction Analyzer. Although accounting for corrections to the traditional resonance condition, the resonance energy between protons（H+）and EMIC waves remains significantly higher than the observed values, indicating that the interaction between protons and EMIC waves is an anomalous resonance process. In contrast, the resonance energy between He+ and EMIC waves is closer to the observed values, the observed parallel velocity of the particles is lower than the resonance velocity, meaning it still qualifies as anomalous resonance. Physical sciences/Astronomy and planetary science/Space physics/Magnetospheric physics Physical sciences/Physics/Astronomy and astrophysics wave-particle interaction Magnetospheric Multiscale mission observation anomalous resonance Full Text Additional Declarations There is NO Competing Interest. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-5281050","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":380570042,"identity":"15160e67-3036-4822-9ec6-fca0288b7e0d","order_by":0,"name":"Heng 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