Now showing items 1-7 of 7

    • 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 ...
    • An investigation into a generalized Fisk-type heliospheric magnetic field 

      Steyn, Petrus Johannes (North-West University (South Africa), Potchefstroom Campus, 2016)
      The existence of a Fisk-type heliospheric magnetic field (HMF) has been contested since the Fisk field [Fisk, 1996] challenged the traditional view of the HMF first proposed by Parker [1958]. Several modifications of the ...
    • Modelling of cosmic ray modulation in the heliosphere by stochastic processes 

      Strauss, Roelf du Toit (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, ...
    • 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 ...
    • The modulation of galactic cosmic rays over a solar cycle 

      Mohlolo, Selwana Timothy (North-West University (South Africa), 2016)
      This work studied the modulation of galactic cosmic rays in the heliosphere by using a well-established, time dependent numerical modulation model to calculate cosmic ray transport inside the heliosphere over a solar ...
    • Die versyfering van historiese kosmiese straal-data = The digitization of historic cosmic-ray data 

      Du Plessis, Tjaard (North-West University, 2010)
      Due to the research on cosmic-rays in the 1930's, the Carnegie Institute in Washington DC instigated the construction of cosmic-ray observation centers around the world. Cosmic-ray activity was recorded using the model C ...