Electron Penetration Acceleration in Turbulent Magnetic Loops
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909628818784256 |
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| author | Gong, Zheng Cao, Sida Redshaw, Caleb Edwards, Matthew R. |
| author_facet | Gong, Zheng Cao, Sida Redshaw, Caleb Edwards, Matthew R. |
| contents | Using particle-in-cell simulations to study fast radio burst (FRB) propagation in a tenuous plasma, we identified a novel mechanism that occurs during the growth of turbulent magnetic loops: electron penetration acceleration. The loops have an electromagnetic left-hand chirality distinct from that of well-known quasistatic magnetic islands. The fast electrons penetrate through the loops and thus are accelerated to unexpected relativistic energies due to the symmetry breaking induced by the coupling between the loop field and the non-relativistic electromagnetic wave. The identified features of penetration acceleration and magnetic loops might provide a new perspective for understanding particle injection into relativistic collisionless shock precursors invoked in FRB-swept cosmic backgrounds. Additionally, we show that this FRB-relevant phenomenon could be tested in scaled laboratory experiments using a multi-terawatt laser impinging on gas targets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_03116 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Electron Penetration Acceleration in Turbulent Magnetic Loops Gong, Zheng Cao, Sida Redshaw, Caleb Edwards, Matthew R. Plasma Physics High Energy Astrophysical Phenomena Using particle-in-cell simulations to study fast radio burst (FRB) propagation in a tenuous plasma, we identified a novel mechanism that occurs during the growth of turbulent magnetic loops: electron penetration acceleration. The loops have an electromagnetic left-hand chirality distinct from that of well-known quasistatic magnetic islands. The fast electrons penetrate through the loops and thus are accelerated to unexpected relativistic energies due to the symmetry breaking induced by the coupling between the loop field and the non-relativistic electromagnetic wave. The identified features of penetration acceleration and magnetic loops might provide a new perspective for understanding particle injection into relativistic collisionless shock precursors invoked in FRB-swept cosmic backgrounds. Additionally, we show that this FRB-relevant phenomenon could be tested in scaled laboratory experiments using a multi-terawatt laser impinging on gas targets. |
| title | Electron Penetration Acceleration in Turbulent Magnetic Loops |
| topic | Plasma Physics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2504.03116 |