Shear Alfvén Waves in Chaotic Magnetic Fields
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866917108036665344 |
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| author | Thomas, Matthew Qu, Zhisong Hole, Matthew |
| author_facet | Thomas, Matthew Qu, Zhisong Hole, Matthew |
| contents | The shear Alfvén spectrum is computed in the presence of symmetry breaking perturbations that introduce chaotic magnetic field trajectories. Quadratic flux minimised surfaces allow the creation of pseudo straight field line coordinates in the chaotic region. With these coordinates, the reduced ideal MHD equations are cast into an eigenvalue problem and solved numerically. The spectrum is computed with varying perturbation strength, showing how shear Alfvén waves change as increasing number of flux surfaces are destroyed. Solutions on specific flux surfaces are shown to remain relatively unchanged while the flux surface remains intact, and retain some original features at large perturbations where the flux surface is destroyed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_21976 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Shear Alfvén Waves in Chaotic Magnetic Fields Thomas, Matthew Qu, Zhisong Hole, Matthew Plasma Physics The shear Alfvén spectrum is computed in the presence of symmetry breaking perturbations that introduce chaotic magnetic field trajectories. Quadratic flux minimised surfaces allow the creation of pseudo straight field line coordinates in the chaotic region. With these coordinates, the reduced ideal MHD equations are cast into an eigenvalue problem and solved numerically. The spectrum is computed with varying perturbation strength, showing how shear Alfvén waves change as increasing number of flux surfaces are destroyed. Solutions on specific flux surfaces are shown to remain relatively unchanged while the flux surface remains intact, and retain some original features at large perturbations where the flux surface is destroyed. |
| title | Shear Alfvén Waves in Chaotic Magnetic Fields |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2511.21976 |