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@article{Desai:2021:10.1029/2021JA029802,
author = {Desai, R and Eastwood, J and Horne, R and Allison, H and Allanson, O and Watt, C and Eggington, J and Glauert, S and Meredith, N and Archer, M and Staples, F and Mejnertsen, L and Tong, J and Chittenden, J},
doi = {10.1029/2021JA029802},
journal = {Journal of Geophysical Research: Space Physics},
pages = {1--14},
title = {Drift orbit bifurcations and cross-field transport in the outer radiation belt: global MHD and integrated test-particle simulations},
url = {http://dx.doi.org/10.1029/2021JA029802},
volume = {126},
year = {2021}
}

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TY  - JOUR
AB  - Energetic particle fluxes in the outer magnetosphere present a significant challenge to modellingefforts as they can vary by orders of magnitude in response to solar wind driving conditions. In thisarticle, we demonstrate the ability to propagate test particles through global MHD simulations to ahigh level of precision and use this to map the cross-field radial transport associated with relativisticelectrons undergoing drift orbit bifurcations (DOBs). The simulations predict DOBs primarily occurwithin an Earth radius of the magnetopause loss cone and appears significantly different for southwardand northward interplanetary magnetic field orientations. The changes to the second invariant areshown to manifest as a dropout in particle fluxes with pitch angles close to 90and indicate DOBsare a cause of butterfly pitch angle distributions within the night-time sector. The convective electricfield, not included in previous DOB studies, is found to have a significant effect on the resultant longterm transport, and losses to the magnetopause and atmosphere are identified as a potential methodfor incorporating DOBs within Fokker-Planck transport models.
AU  - Desai,R
AU  - Eastwood,J
AU  - Horne,R
AU  - Allison,H
AU  - Allanson,O
AU  - Watt,C
AU  - Eggington,J
AU  - Glauert,S
AU  - Meredith,N
AU  - Archer,M
AU  - Staples,F
AU  - Mejnertsen,L
AU  - Tong,J
AU  - Chittenden,J
DO  - 10.1029/2021JA029802
EP  - 14
PY  - 2021///
SN  - 2169-9380
SP  - 1
TI  - Drift orbit bifurcations and cross-field transport in the outer radiation belt: global MHD and integrated test-particle simulations
T2  - Journal of Geophysical Research: Space Physics
UR  - http://dx.doi.org/10.1029/2021JA029802
UR  - https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021JA029802
UR  - http://hdl.handle.net/10044/1/91587
VL  - 126
ER  -

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