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Now showing items 1-10 of 76

#### Solving Parker’s transport equation with stochastic differential equations on GPUs

(Elsevier, 2015)

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 CPUs and computer clusters in order to decrease the computation ...

#### Modelling the effects of scattering parameters on particle-drift in the solar modulation of galactic cosmic rays

(Elsevier, 2015)

It is well known that particle drift motions are suppressed by diffusive scattering as established by direct numerical simulations. The effect of constant scattering on the drift velocities of charged particles has always ...

#### Time dependence of the e-flux measured by PAMELA during the 2006 July-2009 December solar minimum

(IOP Publishing, 2015)

Precision measurements of the electron component of cosmic radiation provide important information about the
origin and propagation of cosmic rays in the Galaxy not accessible from the study of cosmic-ray nuclear
components ...

#### The effect of a dynamic inner heliosheath thickness on cosmic-ray modulation

(IOP Publishing, 2015)

The time-dependent modulation of galactic cosmic rays in the heliosphere is studied over different polarity cycles by
computing 2.5 GV proton intensities using a two-dimensional, time-dependent modulationmodel. By ...

#### Modelling anomalous cosmic ray oxygen in the heliosheath

(EDP Sciences, 2010)

This paper discusses a numerical modulation model to describe anomalous cosmic ray acceleration and transport in the heliosheath, the portion of the heliosphere between the termination shock and the heliopause. The model ...

#### The role of radial perpendicular diffusion and latitude dependent acceleration along the solar

(Elsevier, 2008)

A numerical model, based on Parker’s transport equation, describing the modulation of anomalous cosmic rays and containing diffusive shock acceleration is applied. The role of radial perpendicular diffusion at the solar ...

#### A local interstellar spectrum for galactic electrons

(Elsevier, 2013)

A heliopause spectrum at 122 AU from the Sun is presented for galactic electrons over an energy range
from 1 MeV to 50 GeV that can be considered the lowest possible local interstellar spectrum (LIS). The
focus of this ...

#### Time dependence of the proton flux measured by Pamela during the 2006 July-2009 December solar minimum

(IOP Science, 2013)

The energy spectra of galactic cosmic rays carry fundamental information regarding their origin and propagation. These spectra, when measured near Earth, are significantly affected by the solar magnetic field. A comprehensive ...

#### Cosmic ray flux at the earth in a variable heliosphere

(Elsevier, 2008)

In recent years the variability of the cosmic ray flux has become one of the main issues not only for the interpretation of the abundances of cosmogenic isotopes in cosmochronic archives like, e.g., ice cores, but also for ...

#### Heliospace physics in South Africa: IHY 2007

(Elsevier, 2008)

An overview is given of research activities in South Africa related to the International Heliophysical Year in 2007. The emphasis is on Space Physics (Geospace and Heliospace). A short historical perspective is given, ...