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- Title
Electron Energization by Parallel Electric Fields in Poloidal Standing Waves.
- Authors
Damiano, P. A.; Kim, E.‐H.; Johnson, J. R.; Porazik, P.
- Abstract
A hybrid gyrofluid‐kinetic electron model is adapted and used to simulate poloidal standing modes for different electron temperatures and azimuthal mode numbers. As in previous studies of toroidal standing modes, mirror force effects lead to increased parallel potential drops, monoenergetic electron energization, and wave energy dissipation as the ambient electron temperature is increased. A similar trend is also observed when the electron temperature is held fixed and the azimuthal mode number increased—owing to the narrowing of the azimuthal flux tube width, which necessitates more electron energization to carry the increased parallel current density. In both cases, the increase in electron energization eventually leads to more rapid decreases in the parallel current with time because of the dissipation of wave energy. Key Points: The first full flux tube kinetic simulations of electron energization in poloidal standing modes are presentedElectron energization and wave energy dissipation are increased with electron temperature and azimuthal mode numberThe monoenergetic nature of the electron energization is consistent with previously published results for toriodal standing modes
- Subjects
ELECTRONS; ELECTRIC fields; POLOIDAL magnetic fields; STANDING waves; ELECTRON temperature
- Publication
Journal of Geophysical Research. Space Physics, 2019, Vol 124, Issue 8, p6691
- ISSN
2169-9380
- Publication type
Article
- DOI
10.1029/2019JA026849