205 citations · 702 across the 17 of their papers we have counts for
10 papers · 1 filter
Energetic Proton Back-Precipitation onto the Solar Atmosphere in Relation to Long-Duration Gamma-Ray Flares
Adam Hutchinson, Silvia Dalla, Timo Laitinen +4
Gamma-ray emission during long-duration gamma-ray flare (LDGRF) events is thought to be caused mainly by 300 MeV protons interacting with the ambient plasma at or near the photo…
The effect of turbulence strength on meandering field lines and Solar Energetic Particle event extents
T. Laitinen, F. Effenberger, A. Kopp +1
Insights into the processes of Solar Energetic Particle (SEP) propagation are essential for understanding how solar eruptions affect the radiation environment of near-Earth space.…
Energetic particle transport across the mean magnetic field: before diffusion
T. Laitinen, S. Dalla
Current particle transport models describe the propagation of charged particles across the mean field direction in turbulent plasmas as diffusion. However, recent studies suggest t…
Time dependence of Fe/O ratio within a 3D Solar Energetic Particle propagation model including drift
S. Dalla, M. S. Marsh, P. Zelina +1
Context. The intensity profiles of iron and oxygen in Solar Energetic Particle (SEP) events often display differences that result in a decreasing Fe/O ratio over time. The physical…
Solar energetic particle access to distant longitudes through turbulent field-line meandering
T. Laitinen, A. Kopp, F. Effenberger +2
Context. Current solar energetic particle (SEP) propagation models describe the effects of interplanetary plasma turbulence on SEPs as diffusion, using a Fokker-Planck (FP) equatio…
Injection of thermal and suprathermal seed particles into coronal shocks of varying obliquity
Markus Battarbee, Rami Vainio, Timo Laitinen +1
Context: Diffusive shock acceleration in the solar corona can accelerate solar energetic particles to very high energies. Acceleration efficiency is increased by entrapment through…
Energetic particle cross-field propagation early in a solar event
T. Laitinen, S. Dalla, M. S. Marsh
Solar energetic particles (SEPs) have been observed to easily spread across heliographic longitudes, and the mechanisms responsible for this behaviour remain unclear. We use full-o…
Energetic Particle Diffusion In Critically Balanced Turbulence
T. Laitinen, S. Dalla, J. Kelly +1
Observations and modelling suggest that the fluctuations in magnetised plasmas exhibit scale-dependent anisotropy, with more energy in the fluctuations perpendicular to the mean ma…
Particle scattering in turbulent plasmas with amplified wave modes
Sebastian Lange, Felix Spanier, Markus Battarbee +2
High-energy particles stream during coronal mass ejections or flares through the plasma of the solar wind. This causes instabilities, which lead to wave growth at specific resonant…
Heavy-ion Acceleration and Self-generated Waves in Coronal Shocks
Markus Battarbee, Timo Laitinen, Rami Vainio
Context: Acceleration in coronal mass ejection driven shocks is currently considered the primary source of large solar energetic particle events. Aims: The solar wind, which feeds…