Thresholdless stochastic particle heating by a single wave
| Autor: | Sattin, F., Escande, D. F. |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Physical Review E 065201 , vol. 107 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevE.107.065201 |
| Popis: | Stochastic heating is a well-known mechanism through which magnetized particles may be energized by low-frequency electromagnetic waves. In its simplest version, under spatially homogeneous conditions, it is known to be operative only above a threshold in the normalized wave amplitude, which may be a demanding requisite in actual scenarios, severely restricting its range of applicability. In this work we show, by numerical simulations supported by inspection of the particle Hamiltonian, that allowing for even a very weak spatial inhomogeneity completely removes the threshold, trading the requirement upon the wave amplitude with a requisite upon the duration of the interaction between wave and particle. The thresholdless chaotic mechanism considered here is likely to be applicable to other inhomogeneous systems. Comment: V2. Some minor mistakes corrected |
| Databáze: | arXiv |
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