Wave analysis during energetic electron microinjections: A case study
The Magnetospheric Multi-scale Mission has frequently observed periodic bursts of counterstreaming electrons with energies ranging from ≈ 30 to 500 keV at the Earth's magnetospheric boundary layers, termed “microinjections.” Recently, a source region for microinjections was discovered at the hi...
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creator | Nykyri, K. Liou, Y. Ma, X. Kavosi, S. Egedal, J. Fuselier, S. A. Gomez, R. G |
description | The Magnetospheric Multi-scale Mission has frequently observed periodic bursts of counterstreaming electrons with energies ranging from
≈ 30 to 500 keV at the Earth's magnetospheric boundary layers, termed “microinjections.” Recently, a source region for microinjections was discovered at the high-latitude magnetosphere where microinjections showed up simultaneously at all energy channels and were organized by magnetic field variation associated with ultra low frequency mirror mode waves (MMWs) with
≈ 5 min periodicity. These MMWs were associated with strong higher frequency electromagnetic wave activity. Here, we have identified some of these waves as electromagnetic ion cyclotron (EMIC) waves. EMIC waves and parallel electric fields often lead to the radiation belt electron losses due to pitch-angle scattering. We show that, for the present event, the EMIC waves are not responsible for scattering electrons into a loss cone, and thus, they are unlikely to be responsible for the observed microinjection signature. We also find that the parallel electric field potentials within the waves are not adequate to explain the observed electrons with >90 keV energies. While whistler waves may contribute to the electron scattering and may exist during this event, there was no burst mode data available to verify this. |
doi_str_mv | 10.1063/5.0142938 |
format | Article |
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≈ 30 to 500 keV at the Earth's magnetospheric boundary layers, termed “microinjections.” Recently, a source region for microinjections was discovered at the high-latitude magnetosphere where microinjections showed up simultaneously at all energy channels and were organized by magnetic field variation associated with ultra low frequency mirror mode waves (MMWs) with
≈ 5 min periodicity. These MMWs were associated with strong higher frequency electromagnetic wave activity. Here, we have identified some of these waves as electromagnetic ion cyclotron (EMIC) waves. EMIC waves and parallel electric fields often lead to the radiation belt electron losses due to pitch-angle scattering. We show that, for the present event, the EMIC waves are not responsible for scattering electrons into a loss cone, and thus, they are unlikely to be responsible for the observed microinjection signature. We also find that the parallel electric field potentials within the waves are not adequate to explain the observed electrons with >90 keV energies. While whistler waves may contribute to the electron scattering and may exist during this event, there was no burst mode data available to verify this.</description><identifier>ISSN: 1070-664X</identifier><identifier>EISSN: 1089-7674</identifier><identifier>DOI: 10.1063/5.0142938</identifier><identifier>CODEN: PHPAEN</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Boundary layers ; Cyclotrons ; Earth magnetosphere ; Electric fields ; Electromagnetic radiation ; Electrons ; Extremely low frequencies ; Jupiter ; Periodic variations ; Pitch (inclination) ; Plasma physics ; Radiation belts ; Scattering</subject><ispartof>Physics of plasmas, 2023-07, Vol.30 (7)</ispartof><rights>Author(s)</rights><rights>2023 Author(s). Published under an exclusive license by AIP Publishing.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c327t-aa4d31561baaba4ea51ce1e90bab0547a470762535964038374da5f57738ba73</citedby><cites>FETCH-LOGICAL-c327t-aa4d31561baaba4ea51ce1e90bab0547a470762535964038374da5f57738ba73</cites><orcidid>0000-0002-7568-0755 ; 0000-0001-7888-668X ; 0000-0003-4101-7901 ; 0000-0002-8813-0517 ; 0000-0001-7753-1529 ; 0000-0002-6905-9487</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/pop/article-lookup/doi/10.1063/5.0142938$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>314,780,784,794,4512,27924,27925,76384</link.rule.ids></links><search><creatorcontrib>Nykyri, K.</creatorcontrib><creatorcontrib>Liou, Y.</creatorcontrib><creatorcontrib>Ma, X.</creatorcontrib><creatorcontrib>Kavosi, S.</creatorcontrib><creatorcontrib>Egedal, J.</creatorcontrib><creatorcontrib>Fuselier, S. A.</creatorcontrib><creatorcontrib>Gomez, R. G</creatorcontrib><title>Wave analysis during energetic electron microinjections: A case study</title><title>Physics of plasmas</title><description>The Magnetospheric Multi-scale Mission has frequently observed periodic bursts of counterstreaming electrons with energies ranging from
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≈ 5 min periodicity. These MMWs were associated with strong higher frequency electromagnetic wave activity. Here, we have identified some of these waves as electromagnetic ion cyclotron (EMIC) waves. EMIC waves and parallel electric fields often lead to the radiation belt electron losses due to pitch-angle scattering. We show that, for the present event, the EMIC waves are not responsible for scattering electrons into a loss cone, and thus, they are unlikely to be responsible for the observed microinjection signature. We also find that the parallel electric field potentials within the waves are not adequate to explain the observed electrons with >90 keV energies. While whistler waves may contribute to the electron scattering and may exist during this event, there was no burst mode data available to verify this.</description><subject>Boundary layers</subject><subject>Cyclotrons</subject><subject>Earth magnetosphere</subject><subject>Electric fields</subject><subject>Electromagnetic radiation</subject><subject>Electrons</subject><subject>Extremely low frequencies</subject><subject>Jupiter</subject><subject>Periodic variations</subject><subject>Pitch (inclination)</subject><subject>Plasma physics</subject><subject>Radiation belts</subject><subject>Scattering</subject><issn>1070-664X</issn><issn>1089-7674</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLw0AUhQdRsFYX_oMBVwqpdzKvxF0p9QEFNwXdDTeT2zKlTepMIvTfm9KuXd1z4eNwzmHsXsBEgJHPegJC5aUsLthIQFFm1lh1edQWMmPU9zW7SWkDAMroYsTmX_hLHBvcHlJIvO5jaNacGopr6oLntCXfxbbhu-BjG5rN8Ia2SS98yj0m4qnr68Mtu1rhNtHd-Y7Z8nW-nL1ni8-3j9l0kXmZ2y5DVLUU2ogKsUJFqIUnQSVUWIFWFpUFa3ItdWkUyEJaVaNeaWtlUaGVY_Zwst3H9qen1LlN28che3J5IZUUpchhoB5P1BA4pUgrt49hh_HgBLjjSE6780gD-3Rikw8dHpv9A_8B_k9lvg</recordid><startdate>202307</startdate><enddate>202307</enddate><creator>Nykyri, K.</creator><creator>Liou, Y.</creator><creator>Ma, X.</creator><creator>Kavosi, S.</creator><creator>Egedal, J.</creator><creator>Fuselier, S. A.</creator><creator>Gomez, R. G</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-7568-0755</orcidid><orcidid>https://orcid.org/0000-0001-7888-668X</orcidid><orcidid>https://orcid.org/0000-0003-4101-7901</orcidid><orcidid>https://orcid.org/0000-0002-8813-0517</orcidid><orcidid>https://orcid.org/0000-0001-7753-1529</orcidid><orcidid>https://orcid.org/0000-0002-6905-9487</orcidid></search><sort><creationdate>202307</creationdate><title>Wave analysis during energetic electron microinjections: A case study</title><author>Nykyri, K. ; Liou, Y. ; Ma, X. ; Kavosi, S. ; Egedal, J. ; Fuselier, S. A. ; Gomez, R. G</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c327t-aa4d31561baaba4ea51ce1e90bab0547a470762535964038374da5f57738ba73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Boundary layers</topic><topic>Cyclotrons</topic><topic>Earth magnetosphere</topic><topic>Electric fields</topic><topic>Electromagnetic radiation</topic><topic>Electrons</topic><topic>Extremely low frequencies</topic><topic>Jupiter</topic><topic>Periodic variations</topic><topic>Pitch (inclination)</topic><topic>Plasma physics</topic><topic>Radiation belts</topic><topic>Scattering</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nykyri, K.</creatorcontrib><creatorcontrib>Liou, Y.</creatorcontrib><creatorcontrib>Ma, X.</creatorcontrib><creatorcontrib>Kavosi, S.</creatorcontrib><creatorcontrib>Egedal, J.</creatorcontrib><creatorcontrib>Fuselier, S. A.</creatorcontrib><creatorcontrib>Gomez, R. G</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physics of plasmas</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nykyri, K.</au><au>Liou, Y.</au><au>Ma, X.</au><au>Kavosi, S.</au><au>Egedal, J.</au><au>Fuselier, S. A.</au><au>Gomez, R. G</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Wave analysis during energetic electron microinjections: A case study</atitle><jtitle>Physics of plasmas</jtitle><date>2023-07</date><risdate>2023</risdate><volume>30</volume><issue>7</issue><issn>1070-664X</issn><eissn>1089-7674</eissn><coden>PHPAEN</coden><abstract>The Magnetospheric Multi-scale Mission has frequently observed periodic bursts of counterstreaming electrons with energies ranging from
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≈ 5 min periodicity. These MMWs were associated with strong higher frequency electromagnetic wave activity. Here, we have identified some of these waves as electromagnetic ion cyclotron (EMIC) waves. EMIC waves and parallel electric fields often lead to the radiation belt electron losses due to pitch-angle scattering. We show that, for the present event, the EMIC waves are not responsible for scattering electrons into a loss cone, and thus, they are unlikely to be responsible for the observed microinjection signature. We also find that the parallel electric field potentials within the waves are not adequate to explain the observed electrons with >90 keV energies. While whistler waves may contribute to the electron scattering and may exist during this event, there was no burst mode data available to verify this.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/5.0142938</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0002-7568-0755</orcidid><orcidid>https://orcid.org/0000-0001-7888-668X</orcidid><orcidid>https://orcid.org/0000-0003-4101-7901</orcidid><orcidid>https://orcid.org/0000-0002-8813-0517</orcidid><orcidid>https://orcid.org/0000-0001-7753-1529</orcidid><orcidid>https://orcid.org/0000-0002-6905-9487</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Boundary layers Cyclotrons Earth magnetosphere Electric fields Electromagnetic radiation Electrons Extremely low frequencies Jupiter Periodic variations Pitch (inclination) Plasma physics Radiation belts Scattering |
title | Wave analysis during energetic electron microinjections: A case study |
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