globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1721343115
论文题名:
Spiky electric and magnetic field structures in flux rope experiments
作者: Gekelman W.; Tang S.W.; DeHaas T.; Vincena S.; Pribyl P.; Sydora R.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2019
卷: 116, 期:37
起始页码: 18239
结束页码: 18244
语种: 英语
英文关键词: Colliding flux ropes ; Flux ropes ; Magnetic reconnection ; Nonlinear structures ; Time domain structures
Scopus关键词: article ; computer simulation ; electron ; intermethod comparison ; magnetic field ; probability ; spike ; statistical distribution
英文摘要: Magnetic flux ropes are structures that are common in the corona of the sun and presumably all stars. They can be thought of as the building blocks of solar structures. They have been observed in Earth’s magnetotail and near Mars and Venus. When multiple flux ropes are present magnetic field line reconnection, which converts magnetic energy to other forms, can occur when they collide. The structure of multiple magnetic ropes, the interactions between multiple ropes, and their topological properties such as helicity and writhing have been studied theoretically and in laboratory experiments. Here, we report on spiky potential and magnetic fields associated with the ropes. We show that the potential structures are chaotic for a range of their temporal half-widths and the probability density function (PDF) of their widths resembles the statistical distribution of crumpled paper. The spatial structure of the magnetic spikes is revealed using a correlation counting method. Computer simulation suggests that the potential structures are the nonlinear end result of an instability involving relative drift between ions and electrons. © 2019 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163538
Appears in Collections:气候变化与战略

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作者单位: Gekelman, W., Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, United States; Tang, S.W., Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, United States; DeHaas, T., Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, United States; Vincena, S., Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, United States; Pribyl, P., Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, United States; Sydora, R., Department of Physics, University of Alberta, Edmonton, AB T6G 2R3, Canada

Recommended Citation:
Gekelman W.,Tang S.W.,DeHaas T.,et al. Spiky electric and magnetic field structures in flux rope experiments[J]. Proceedings of the National Academy of Sciences of the United States of America,2019-01-01,116(37)
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