Climate Change Data Portal
| DOI | 10.1029/2020GL088976 |
| A New Approach to Constructing Models of Electron Diffusion by EMIC Waves in the Radiation Belts | |
| Ross J.P.J.; Glauert S.A.; Horne R.B.; Watt C.E.; Meredith N.P.; Woodfield E.E. | |
| Date Issued | 2020 |
| ISSN | 0094-8276 |
| Volume | 47Issue:20 |
| Other Abstract | Electromagnetic ion cyclotron (EMIC) waves play an important role in relativistic electron losses in the radiation belts through diffusion via resonant wave-particle interactions. We present a new approach for calculating bounce and drift-averaged EMIC electron diffusion coefficients. We calculate bounce-averaged diffusion coefficients, using quasi-linear theory, for each individual Combined Release and Radiation Effects Satellite (CRRES) EMIC wave observation using fitted wave properties, the plasma density and the background magnetic field. These calculations are then combined into bounce-averaged diffusion coefficients. The resulting coefficients therefore capture the combined effects of individual spectra and plasma properties as opposed to previous approaches that use average spectral and plasma properties, resulting in diffusion over a wider range of energies and pitch angles. These calculations, and their role in radiation belt simulations, are then compared against existing diffusion models. The new diffusion coefficients are found to significantly improve the agreement between the calculated decay of relativistic electrons and Van Allen Probes data. ©2020. The Authors. |
| enkeywords | Electrons; Magnetic field effects; Plasma density; Plasma devices; Radiation belts; Radiation effects; Combined effect; Constructing models; Diffusion model; Electron diffusion; Electron diffusion coefficient; Plasma properties; Quasilinear theory; Relativistic electron; Diffusion; diffusion; electromagnetic method; electromagnetic radiation; electron; magnetic field; plasma; probe |
| Language | 英语 |
| journal | Geophysical Research Letters
 |
| Source Publication | 英国自然环境研究理事会 |
| Document Type | 期刊论文 |
| Identifier | http://gcip.llas.ac.cn/handle/2XKMVOVA/169603 |
| Affiliation | British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom; Department of Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle-upon-Tyne, United Kingdom |
| Recommended Citation GB/T 7714 | Ross J.P.J.,Glauert S.A.,Horne R.B.,et al. A New Approach to Constructing Models of Electron Diffusion by EMIC Waves in the Radiation Belts[J]. 英国自然环境研究理事会,2020,47(20). |
| APA | Ross J.P.J.,Glauert S.A.,Horne R.B.,Watt C.E.,Meredith N.P.,&Woodfield E.E..(2020).A New Approach to Constructing Models of Electron Diffusion by EMIC Waves in the Radiation Belts.Geophysical Research Letters,47(20). |
| MLA | Ross J.P.J.,et al."A New Approach to Constructing Models of Electron Diffusion by EMIC Waves in the Radiation Belts".Geophysical Research Letters 47.20(2020). |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
