Perpendicular ion heating in turbulence and reconnection: magnetic moment breaking by coherent fluctuations
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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_ | 1866908851055362048 |
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| author | Mallet, Alfred Klein, Kristopher G. Chandran, Benjamin D. G. Ervin, Tamar Bowen, Trevor A. |
| author_facet | Mallet, Alfred Klein, Kristopher G. Chandran, Benjamin D. G. Ervin, Tamar Bowen, Trevor A. |
| contents | We study the interaction of an ion with a fluctuation in the electromagnetic fields that is localized in both space and time. We study the scale-dependence of the interaction in both space and time, deriving a generic form for the ion's energy change, which involves an exponential cutoff based on the characteristic timescale of the electromagnetic fluctuation. This leads to diffusion in energy in both $v_\perp$ and $v_\parallel$. We show how to apply our results to general plasma physics phenomena, and specifically to Alfvénic turbulence and to reconnection. Our theory can be viewed as a unification of previous models of stochastic ion heating, cyclotron heating, and reconnection heating in a single theoretical framework. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_05518 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Perpendicular ion heating in turbulence and reconnection: magnetic moment breaking by coherent fluctuations Mallet, Alfred Klein, Kristopher G. Chandran, Benjamin D. G. Ervin, Tamar Bowen, Trevor A. Plasma Physics Space Physics We study the interaction of an ion with a fluctuation in the electromagnetic fields that is localized in both space and time. We study the scale-dependence of the interaction in both space and time, deriving a generic form for the ion's energy change, which involves an exponential cutoff based on the characteristic timescale of the electromagnetic fluctuation. This leads to diffusion in energy in both $v_\perp$ and $v_\parallel$. We show how to apply our results to general plasma physics phenomena, and specifically to Alfvénic turbulence and to reconnection. Our theory can be viewed as a unification of previous models of stochastic ion heating, cyclotron heating, and reconnection heating in a single theoretical framework. |
| title | Perpendicular ion heating in turbulence and reconnection: magnetic moment breaking by coherent fluctuations |
| topic | Plasma Physics Space Physics |
| url | https://arxiv.org/abs/2509.05518 |