Search
Now showing items 1-10 of 16
Modelling of galactic cosmic ray electrons in the heliosphere
(North-West University, 2012)
The Voyager 1 spacecraft is now about 25 AU beyond the heliospheric termination shock and
soon it should encounter the outer boundary of the heliosphere, the heliopause. This is set to
be at 120 AU in the modulation model ...
Time–dependent modulation of cosmic rays in the outer heliosphere
(North-West University, 2013)
The time-dependent modulation of galactic cosmic rays in the heliosphere is studied by computing
intensities using a two-dimensional, time-dependent modulation model. The compound
approach of Ferreira and Potgieter (2004), ...
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 ...
Cosmic ray propagation in the galaxy and the heliosphere
(North-West University, 2018)
The local interstellar spectra (LIS’s) for cosmic rays (CRs) are still not fully determined over all
energy ranges. Numerical modelling, such as with the GALPROP code, can be used to calculate
LIS’s for a wide set of CR ...
Modelling of cosmic ray modulation in the heliosphere by stochastic processes
(North-West University, 2013)
The transport of cosmic rays in the heliosphere is studied by making use of a newly developed
modulation model. This model employes stochastic differential equations to numerically solve
the relevant transport equation, ...
A comparative study of cosmic ray modulation models
(North-West University, 2015)
Until recently, numerical modulation models for the solar modulation of cosmic rays have
been based primarily on finite difference approaches; however, models based on the solution
of an appropriate set of stochastic ...
A study of the time-dependent modulation of cosmic rays in the inner heliosphere
(North-West University, 2010)
A two-dimensional (2-D) time-dependent cosmic ray modulation model is used to calculate the modulation of cosmic-ray protons and electrons for 11-and 22-year modulation cycles using a compound approach to describe solar ...
Cosmic ray modulation processes in the heliosphere
(North-West University, 2011)
The solar minimum of 2009 has been identified as an exceptional event with regard to
cosmic ray (CR)modulation, since conditions in the heliosphere have reached unprecedented
quiet levels. This unique minimum has been ...
Modeling of electrons in the heliosphere
(North-West University (South Africa), Potchefstroom Campus, 2016)
The propagation and modulation of electrons in the heliosphere play an important part in
improving our understanding and assessment of the processes of solar modulation. A locally
developed, full three-dimensional, ...
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 ...