Browsing Natural and Agricultural Sciences by Subject "Turbulence"
Now showing items 1-8 of 8
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An ab initio approach to the heliospheric modulation of galactic cosmic rays
(North-West University, 2006)In the present study we aim to further our understanding of charged particle transport in a magnetized medium. To this end, we perform direct numerical simulations of particle transport in a turbulent magnetic field. From ... -
An ab initio approach to the historical modulation of cosmic rays
(North-West University (South Africa), 2021)The relationship between observed cosmic-ray intensities and the heliospheric magnetic field during the early space age is generally considered to be anomalous, relative to their relationship observed at later times. ... -
The effect of the heliospheric current sheet on cosmic-ray modulation
(North-West University (South Africa), Potchefstroom Campus, 2015)The heliospheric current sheet is a dominant feature of the heliosphere. As solar activity increases, the tilt angle of the current sheet increases, and so does the region swept out by this structure, to cover most of ... -
The nature of diffusive particle transport in turbulent magnetic fields
(North-West University (South Africa), Potchefstroom Campus, 2016)The transport of charged particles in turbulent plasma is a crucially important area of research in astrophysics, since it directly impacts our ability to interpret observations done with a major group of messenger ... -
Numerical modelling of the microphysical foundation of astrophysical particle acceleration
(North-West University (South Africa), Potchefstroom Campus, 2016)The acceleration and transport of solar energetic particles have been intensively studied ever since the discovery of relativistic particles originating from the Sun. Both processes are tightly connected to the dynamics ... -
On the development and applications of a three–dimensional ab initio cosmic–ray modulation model
(North-West University, 2012)A proper understanding of the effects of turbulence on the diffusion and drift of cosmic-rays in the heliosphere is imperative for a better understanding of cosmic-ray modulation. This study presents an ab initio model ... -
On the heliospheric diffusion tensor and its effect on 26-day recurrent cosmic-ray variations
(North-West University, 2008)A first attempt at an ab initio steady-state three-dimensional modulation model for galactic cosmic ray electrons, utilizing expressions adapted from the work of Teufel and Schlickeiser [2003] and Shalchi et al. [2004a] ... -
The solar-cycle dependence of the heliospheric diffusion tensor
(North-West University, 2015)Long-term cosmic-ray modulation studies using ab initio numerical modulation models require an understanding of the solar-cycle dependence of the heliospheric diffusion tensor. Such an understanding requires information ...