Now showing items 1-8 of 8

    • Acceleration of cosmic rays in the outer heliosphere 

      Prinsloo, Phillip Lourens (North-West University (South Africa) , Potchefstroom Campus, 2016)
      Shortly before the Voyager spacecraft crossed the heliospheric termination shock, they encountered narrow, peak-like enhancements in the intensities of low-energy electrons. These enhancements were associated at the time ...
    • Cosmic ray modulation processes in the heliosphere 

      Vos, Etienne Eben (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 

      Nndanganeni, Rendani Rejoyce (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, ...
    • Modelling charge-sign dependent modulation of cosmic rays in the heliosphere 

      Vos, Etienne Eben (North-West University (South Africa) , Potchefstroom Campus, 2016)
      The solar minimum of cycle 23/24 has seen exceptionally quiet levels of solar activity and heliospheric modulation, which resulted in the highest cosmic ray (CR) spectrum ever recorded at Earth in December 2009 by the ...
    • Modelling of galactic and jovian electrons in the heliosphere 

      Moeketsi, Daniel Mojalefa (North-West University, 2004)
      A three-dimensional (3D) steady-state electron modulation model based on Parker (1965) transport equation is applied to study the modelling of – 7 MeV galactic and Jovian electrons in the inner heliosphere. The latter is ...
    • Modelling of galactic cosmic ray electrons in the heliosphere 

      Nndanganeni, Rendani Rejoyce (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 ...
    • A study of cosmic ray anisotropies in the heliosphere 

      Nkosi, Godfrey Sibusiso (North-West University, 2006)
      The three-dimensional (3D) steady-state electron modulation model of Ferreira (2002), based on Parker (1965) transport equation, is used to study the modulation of the 7 MeV galactic and Jovian electron anisotropies in ...
    • The energy range of drift effects in the solar modulation of cosmic ray electrons 

      Nndanganeni, Rendani R.; Potgieter, Marius S. (Elsevier, 2016)
      A comprehensive three-dimensional modulation model is used to study the energy range of drift effects in the solar modulation of cosmic ray (galactic) electrons. Drift effects are defined as the difference between modulated ...