Nonstandard Collapse of Strong Langmuir Turbulence: Constraints on Its Occurrence and Observation in the Solar Corona
We present fully kinetic simulations of strong Langmuir turbulence (SLT) excited by electron beams with solar coronal conditions. We study two different collapsing processes within the parameter regimes of classical modulational instability (MI) and electron MI (EMI). For the first time, we simulate...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal Letters |
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| Online Access: | https://doi.org/10.3847/2041-8213/ade9bb |
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| author | Yaokun Li Haomin Sun Hao Ning Sulan Ni Xiangliang Kong Jiansen He Yao Chen |
| author_facet | Yaokun Li Haomin Sun Hao Ning Sulan Ni Xiangliang Kong Jiansen He Yao Chen |
| author_sort | Yaokun Li |
| collection | DOAJ |
| description | We present fully kinetic simulations of strong Langmuir turbulence (SLT) excited by electron beams with solar coronal conditions. We study two different collapsing processes within the parameter regimes of classical modulational instability (MI) and electron MI (EMI). For the first time, we simulated the EMI-induced collapse of moving multiple packets that is referred to as the non-Zakharov (or nonstandard) process here. We also simulated the classical Zakharov collapse of SLT induced by MI. During the early stage of the nonstandard collapse, the propagating packets get localized to form density cavities with depths of less than 0.1 n _0 (the background electron density) that are too shallow to trap the packets. As a result, a majority of the packet energy runs away, undergoes a secondary collapse, and generates stationary packets with cavities. During the damping stage, the packets accelerate the background electrons to form numerous bidirectional propagating jets that distribute asymmetrically. This study reveals novel features of SLT collapse under coronal conditions. |
| format | Article |
| id | doaj-art-ecc0ba95579a4cf8b892f8439f017426 |
| institution | DOAJ |
| issn | 2041-8205 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Letters |
| spelling | doaj-art-ecc0ba95579a4cf8b892f8439f0174262025-08-20T02:40:04ZengIOP PublishingThe Astrophysical Journal Letters2041-82052025-01-019881L1710.3847/2041-8213/ade9bbNonstandard Collapse of Strong Langmuir Turbulence: Constraints on Its Occurrence and Observation in the Solar CoronaYaokun Li0Haomin Sun1Hao Ning2Sulan Ni3Xiangliang Kong4https://orcid.org/0000-0003-1034-5857Jiansen He5https://orcid.org/0000-0001-8179-417XYao Chen6https://orcid.org/0000-0001-6449-8838Institute of Frontier and Interdisciplinary Science, Shandong University , Qingdao, Shandong 266237, People’s Republic of China ; yaochen@sdu.edu.cn; Institute of Space Sciences, Shandong University , Shandong 264209, People’s Republic of ChinaÉcole Polytechnique Fédérale de Lausanne (EPFL) , Swiss Plasma Center (SPC), CH-1015 Lausanne, SwitzerlandInstitute of Frontier and Interdisciplinary Science, Shandong University , Qingdao, Shandong 266237, People’s Republic of China ; yaochen@sdu.edu.cn; Institute of Space Sciences, Shandong University , Shandong 264209, People’s Republic of ChinaSchool of Physics and Electronic Information, Yantai University , Shandong 264005, People’s Republic of ChinaInstitute of Frontier and Interdisciplinary Science, Shandong University , Qingdao, Shandong 266237, People’s Republic of China ; yaochen@sdu.edu.cn; Institute of Space Sciences, Shandong University , Shandong 264209, People’s Republic of ChinaSchool of Earth and Space Sciences, Peking University , Beijing 100871, People’s Republic of ChinaInstitute of Frontier and Interdisciplinary Science, Shandong University , Qingdao, Shandong 266237, People’s Republic of China ; yaochen@sdu.edu.cn; Institute of Space Sciences, Shandong University , Shandong 264209, People’s Republic of ChinaWe present fully kinetic simulations of strong Langmuir turbulence (SLT) excited by electron beams with solar coronal conditions. We study two different collapsing processes within the parameter regimes of classical modulational instability (MI) and electron MI (EMI). For the first time, we simulated the EMI-induced collapse of moving multiple packets that is referred to as the non-Zakharov (or nonstandard) process here. We also simulated the classical Zakharov collapse of SLT induced by MI. During the early stage of the nonstandard collapse, the propagating packets get localized to form density cavities with depths of less than 0.1 n _0 (the background electron density) that are too shallow to trap the packets. As a result, a majority of the packet energy runs away, undergoes a secondary collapse, and generates stationary packets with cavities. During the damping stage, the packets accelerate the background electrons to form numerous bidirectional propagating jets that distribute asymmetrically. This study reveals novel features of SLT collapse under coronal conditions.https://doi.org/10.3847/2041-8213/ade9bbPlasma astrophysicsSolar coronaSpace plasmas |
| spellingShingle | Yaokun Li Haomin Sun Hao Ning Sulan Ni Xiangliang Kong Jiansen He Yao Chen Nonstandard Collapse of Strong Langmuir Turbulence: Constraints on Its Occurrence and Observation in the Solar Corona The Astrophysical Journal Letters Plasma astrophysics Solar corona Space plasmas |
| title | Nonstandard Collapse of Strong Langmuir Turbulence: Constraints on Its Occurrence and Observation in the Solar Corona |
| title_full | Nonstandard Collapse of Strong Langmuir Turbulence: Constraints on Its Occurrence and Observation in the Solar Corona |
| title_fullStr | Nonstandard Collapse of Strong Langmuir Turbulence: Constraints on Its Occurrence and Observation in the Solar Corona |
| title_full_unstemmed | Nonstandard Collapse of Strong Langmuir Turbulence: Constraints on Its Occurrence and Observation in the Solar Corona |
| title_short | Nonstandard Collapse of Strong Langmuir Turbulence: Constraints on Its Occurrence and Observation in the Solar Corona |
| title_sort | nonstandard collapse of strong langmuir turbulence constraints on its occurrence and observation in the solar corona |
| topic | Plasma astrophysics Solar corona Space plasmas |
| url | https://doi.org/10.3847/2041-8213/ade9bb |
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