Search Results - "Potgieter, M.S"

A stochastic differential equation code for multidimensional Fokker–Planck type problems by Kopp, A., Büsching, I., Strauss, R.D., Potgieter, M.S.

“…We present a newly developed numerical code that integrates Fokker–Planck type transport equations in four to six spatial dimensions (configuration plus…”
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The heliospheric modulation of cosmic rays: Effects of a latitude dependent solar wind termination shock by Ngobeni, M.D., Potgieter, M.S.

“…Observations made with the two Voyager spacecraft confirmed that the solar wind decelerates to form the heliospheric termination shock and that it has begun…”
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The global modulation of cosmic rays during a quiet heliosphere: A modeling perspective by Potgieter, M.S.

“…A perspective is given of the solar modulation of galactic cosmic rays in the heliosphere during the extraordinary quiet solar minimum period from 2006 to…”
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The long-term variability of cosmic ray protons in the heliosphere: A modeling approach by Potgieter, M.S., Mwiinga, N., Ferreira, S.E.S., Manuel, R., Ndiitwani, D.C.

“…Galactic cosmic rays are charged particles created in our galaxy and beyond. They propagate through interstellar space to eventually reach the heliosphere and…”
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The charge-sign dependent effect in the solar modulation of cosmic rays by Potgieter, M.S.

“…The centennial anniversary of the discovery of cosmic rays was in 2012. Since this discovery considerable progress has been made on several aspects related to…”
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Towards understanding time variations of proton to helium ratios in the heliosphere: Implication for the time dependence of the elements of the diffusion tensor by Ngobeni, M.D., Potgieter, M.S., Aslam, O.P.M.

“…A comprehensive three-dimensional numerical model for the modulation of cosmic rays in the heliosphere is applied to investigate the relative roles of the time…”
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Simulations of the solar modulation of Helium isotopes constrained by observations by Ngobeni, M.D., Potgieter, M.S., Aslam, O.P.M., Bisschoff, D., Ramokgaba, I.I., Ndiitwani, D.C.

“…The observation of galactic cosmic ray (GCR) Helium isotopes (3He2 and 4He2) at the Earth had been done precisely with the PAMELA and AMS02 space detectors and…”
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Modelling the effects of scattering parameters on particle-drift in the solar modulation of galactic cosmic rays by Ngobeni, M.D., Potgieter, M.S.

“…It is well known that particle drift motions are suppressed by diffusive scattering as established by direct numerical simulations. The effect of constant…”
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The effects of magnetic field modifications on the solar modulation of cosmic rays with a SDE-based model by Raath, J.L., Potgieter, M.S., Strauss, R.D., Kopp, A.

“…A numerical model for the solar modulation of cosmic rays, based on the solution of a set of stochastic differential equations (SDEs), is used to illustrate…”
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A study of the global heliospheric modulation of galactic Carbon by Ngobeni, M.D., Potgieter, M.S.

“…Observations of galactic Carbon in the heliosphere provide a useful tool with which a comprehensive description of the global modulation of cosmic rays both…”
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Where does the heliospheric modulation of galactic cosmic rays start? by Strauss, R.D., Potgieter, M.S.

“…The long outstanding question of where the heliospheric (solar) modulation of galactic cosmic rays actually begins, in terms of spatial position, as well as at…”
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Solving Parker’s transport equation with stochastic differential equations on GPUs by Dunzlaff, P., Strauss, R.D., Potgieter, M.S.

“…The numerical solution of transport equations for energetic charged particles in space is generally very costly in terms of time. Besides the use of multi-core…”
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A local interstellar spectrum for galactic electrons by Potgieter, M.S., Nndanganeni, R.R.

“…•A solar modulation model is compared to observations from Voyager 1 and PAMELA.•A heliopause spectrum is subsequently calculated from 1MeV to 50GeV.•A…”
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Modulation of galactic cosmic rays in a north–south asymmetrical heliosphere by Ngobeni, M.D., Potgieter, M.S.

“…Observations made with the two Voyager spacecraft confirmed that the solar wind decelerates to form the heliospheric termination shock. Voyager 1 crossed this…”
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A stochastic approach to Galactic proton propagation: Influence of the spiral arm structure by Kopp, A., Büsching, I., Potgieter, M.S., Strauss, R.D.

“…•SDE code for multidimensional Fokker–Planck-type equations.•Applied to Galactic propagation of energetic protons.•Diffusion coefficient reflects spiral arm…”
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Manifestation of solar wind corotating interaction regions in GCR intensity variations by Krainev, Mikhail, Kalinin, Mikhail, Bazilevskaya, Galina, Svirzhevskaya, Albina, Svirzhevsky, Nikolay, Luo, Xi, Aslam, O.P.M., Shen, F., Ngobeni, M.D., Potgieter, M.S.

“…The regions of interaction between solar wind streams of different speed, known as corotating interaction regions, form an almost constantly existing structure…”
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Challenges to cosmic ray modeling: From beyond the solar wind termination shock by Potgieter, M.S.

“…Voyager 1 crossed the solar wind termination shock on December 16, 2004 at a distance of 94 AU from the Sun, to become the first spacecraft to explore the…”
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Modeling ground and space based cosmic ray observations by Strauss, R.D., Potgieter, M.S., Ferreira, S.E.S.

“…After entering our local astrosphere (called the heliosphere), galactic cosmic rays, as charged particles, are affected by the Sun’s turbulent magnetic field…”
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The variability of the proton cosmic ray flux on the Sun’s way around the galactic center by Büsching, I., Potgieter, M.S.

“…The discovery of direct evidences for the acceleration of high energetic particles at the shell supernova remnant RXJ1713.7-3946 underlined the need to…”
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Time-dependent cosmic ray modulation by Manuel, R., Ferreira, S.E.S., Potgieter, M.S., Strauss, R.D., Engelbrecht, N.E.

“…Time-dependent cosmic ray modulation is calculated over multiple solar cycles using our well established two-dimensional time-dependent modulation model…”
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