Ion Reflection by a Rippled Perpendicular Shock
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2023
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| _version_ | 1866913580715081728 |
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| author | Khotyaintsev, Yuri V. Graham, Daniel B. Johlander, Andreas |
| author_facet | Khotyaintsev, Yuri V. Graham, Daniel B. Johlander, Andreas |
| contents | We use multi-spacecraft Magnetospheric Multiscale (MMS) observations to investigate electric fields and ion reflection at a non-stationary collisionless perpendicular plasma shock. We identify sub-proton scale (5-10 electron inertial lengths) large-amplitude normal electric fields, balanced by the Hall term ($\mathbf{J} \times \mathbf{B}/ne$), as a transient feature of the shock ramp related to non-stationarity (rippling). The associated electrostatic potential, comparable to the energy of the incident solar wind protons, decelerates incident ions and reflects a significant fraction of protons, resulting in more efficient shock-drift acceleration than a stationary planar shock. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_14736 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Ion Reflection by a Rippled Perpendicular Shock Khotyaintsev, Yuri V. Graham, Daniel B. Johlander, Andreas Space Physics Plasma Physics We use multi-spacecraft Magnetospheric Multiscale (MMS) observations to investigate electric fields and ion reflection at a non-stationary collisionless perpendicular plasma shock. We identify sub-proton scale (5-10 electron inertial lengths) large-amplitude normal electric fields, balanced by the Hall term ($\mathbf{J} \times \mathbf{B}/ne$), as a transient feature of the shock ramp related to non-stationarity (rippling). The associated electrostatic potential, comparable to the energy of the incident solar wind protons, decelerates incident ions and reflects a significant fraction of protons, resulting in more efficient shock-drift acceleration than a stationary planar shock. |
| title | Ion Reflection by a Rippled Perpendicular Shock |
| topic | Space Physics Plasma Physics |
| url | https://arxiv.org/abs/2312.14736 |