July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

3D simulations of heliospheric propagation of heavy-ion solar energetic particles

Jul 30, 2015, 3:30 PM
Theater Foyer (World Forum)

Theater Foyer

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 20
Poster contribution SH-TH Poster 1 SH


Silvia Dalla (University of Central Lancashire)


In recent years, a wealth of spacecraft measurements of heavy ion solar energetic particles have become available, thanks to data from the ACE and STEREO spacecraft. Interesting features in heavy ion time intensity profiles, such as the decay of the Fe/O ratio over time in some events, have been observed. Heliospheric propagation effects have been invoked in the literature as a possible cause of Fe/O decays. Recent modelling work has shown that drifts due to the gradient and curvature of the large scale Parker spiral magnetic field, are a significant source of perpendicular transport for partially ionised heavy ions. Modelling these effects requires a fully 3D description. Here we present results of 3D test particle simulations of heavy ion SEP propagation in the heliosphere, for a Parker spiral magnetic field in a variety of scattering conditions. We simulate intensity profiles of heavy ions as would be observed at 1 AU, and compare them with recent data from STEREO and ACE.
Registration number following "ICRC2015-I/" 676

Primary author

Silvia Dalla (University of Central Lancashire)


Micheal Marsh (UK Met Office) Peter Zelina (University of Central Lancashire) Timo Laitinen (University of Central Lancashire)

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