dorsal/arxiv
View SchemaRapid acceleration of electrons in the magnetosphere by fast-mode MHD waves
| Authors | Danny Summers, Chunyu Ma |
|---|---|
| Categories | |
| ArXiv ID | physics/0003099 |
| URL | https://arxiv.org/abs/physics/0003099 |
| DOI | 10.1029/1999JA000408 |
Abstract
During major megnetic storms, enhanced flux of relativistic electrons in the inner magnetosphere have been observed to correleated with ULF waves. The enhancements can take place over a period of several hours. In order to account for such a rapid generation of relativistic electrons, we examine the mechanism of transit-time acceleration of electrons by low-frequency fast-mode MHD waves, here the assumed form of ULF waves. Calcaulations of the acceleration timescales in the model show that fast-mode waves in the Pc4 to Pc5 frequency range, with typically observed wave amplitudes 10--20 nT, can accelerate the seed electrons to energies of order MeV in a period of a few hours.
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"abstract": "During major megnetic storms, enhanced flux of relativistic electrons in the\ninner magnetosphere have been observed to correleated with ULF waves. The\nenhancements can take place over a period of several hours. In order to account\nfor such a rapid generation of relativistic electrons, we examine the mechanism\nof transit-time acceleration of electrons by low-frequency fast-mode MHD waves,\nhere the assumed form of ULF waves. Calcaulations of the acceleration\ntimescales in the model show that fast-mode waves in the Pc4 to Pc5 frequency\nrange, with typically observed wave amplitudes 10--20 nT, can accelerate the\nseed electrons to energies of order MeV in a period of a few hours.",
"arxiv_id": "physics/0003099",
"authors": [
"Danny Summers",
"Chunyu Ma"
],
"categories": [
"physics.plasm-ph",
"physics.space-ph"
],
"doi": "10.1029/1999JA000408",
"title": "Rapid acceleration of electrons in the magnetosphere by fast-mode MHD waves",
"url": "https://arxiv.org/abs/physics/0003099"
},
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