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DOI | 10.1029/2021GL093826 |
Betatron cooling of electrons in Martian magnetotail | |
Z. Z. Guo; H. S. Fu; J. B. Cao; K. Fan; Z. H. Yao; Y. Y. Liu; Z. Z. Chen; Z. Wang; X. Y. Liu; Y. Xu; C. Mazelle; D. L. Mitchell | |
2021-06-19 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Betatron cooling—a plasma process losing particle energy in the perpendicular direction but reserving particle energy in the field-aligned direction—is a consequence of magnetic depression under the conservation of magnetic moment. Such process has been widely studied in the Earth's magnetosphere, but has never been reported in other planetary environment. Here, by utilizing the MAVEN measurements, we report two events of betatron cooling in the Martian magnetotail. In one of the events, betatron cooling occurs in the suprathermal and energetic ranges of electrons, whereas in the other event, it occurs in the thermal-energy range. We quantitatively reproduce these two processes by using an analytical model. Gratifyingly, the cooling factor derived from the analytical model agrees well with the observation of magnetic depression. These results, for the first time demonstrating the betatron-cooling effect beyond the Earth, are useful to understand the electron dynamics in the planetary magnetosphere. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/330681 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Z. Z. Guo,H. S. Fu,J. B. Cao,et al. Betatron cooling of electrons in Martian magnetotail[J]. Geophysical Research Letters,2021. |
APA | Z. Z. Guo.,H. S. Fu.,J. B. Cao.,K. Fan.,Z. H. Yao.,...&D. L. Mitchell.(2021).Betatron cooling of electrons in Martian magnetotail.Geophysical Research Letters. |
MLA | Z. Z. Guo,et al."Betatron cooling of electrons in Martian magnetotail".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
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