First in situ evidence of electron pitch angle scattering due to magnetic field line curvature in the Ion diffusion region
文献类型：期刊论文
| 作者 | Zhang, Y. C.; Shen, C.; Marchaudon, A.; Rong, Z. J.; Lavraud, B.; Fazakerley, A.; Yao, Z.; Mihaljcic, B.; Ji, Y.; Ma, Y. H. |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
 |
| 出版日期 | 2016 |
| 卷号 | 121期号:5页码:4103-4110 |
| 关键词 | plasma sheet magnetic reconnection magnetic curvature pitch angle scattering |
| ISSN号 | 2169-9380 |
| 通讯作者 | Zhang, YC (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China. ; Zhang, YC (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China. ; Zhang, YC (reprint author), Univ Toulouse UPS, Inst Rech & Astrophys & Planetol, Toulouse, France. ; Zhang, YC (reprint author), CNRS, UMR 5277, Toulouse, France. |
| 英文摘要 | Theory predicts that the first adiabatic invariant of a charged particle may be violated in a region of highly curved field lines, leading to significant pitch angle scattering for particles whose gyroradius are comparable to the radius of the magnetic field line curvature. This scattering generates more isotropic particle distribution functions, with important impacts on the presence or absence of plasma instabilities. Using magnetic curvature analysis based on multipoint Cluster spacecraft observations, we present the first investigation of magnetic curvature in the vicinity of an ion diffusion region where reconnected field lines are highly curved. Electrons at energies>8keV show a clear pitch angle ordering between bidirectional and trapped distribution in surrounding regions, while we show that in the more central part of the ion diffusion region electrons above such energies become isotropic. By contrast, colder electrons (1keV) retain their bidirectional character throughout the diffusion regions. The calculated adiabatic parameter K-2 for these electrons is in agreement with theory. This study provides the first observational evidence for particle pitch angle scattering due to magnetic field lines with well characterized curvature in a space plasma. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/5671]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Zhang, Y. C.,Shen, C.,Marchaudon, A.,et al. First in situ evidence of electron pitch angle scattering due to magnetic field line curvature in the Ion diffusion region[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2016,121(5):4103-4110. |
| APA | Zhang, Y. C..,Shen, C..,Marchaudon, A..,Rong, Z. J..,Lavraud, B..,...&Liu, Z. X..(2016).First in situ evidence of electron pitch angle scattering due to magnetic field line curvature in the Ion diffusion region.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,121(5),4103-4110. |
| MLA | Zhang, Y. C.,et al."First in situ evidence of electron pitch angle scattering due to magnetic field line curvature in the Ion diffusion region".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 121.5(2016):4103-4110. |
入库方式： OAI收割
来源：国家空间科学中心
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