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Modulation of galactic cosmic ray protons and electrons during an unusual solar minimum
(IOP Publishing, 2009)
During the latest Ulysses out-of-ecliptic orbit the solar wind density, pressure, and magnetic field strength have been the lowest ever observed in the history of space exploration. Since cosmic ray particles respond to ...
On the propagation times and energy losses of cosmic rays in the heliosphere
(American Geophysical Union, 2011)
We present calculations of the propagation times and energy losses of cosmic rays as they are transported through the heliosphere. By calculating these quantities for a spatially 1D scenario, we benchmark our numerical ...
Modeling the modulation of galactic and jovian electrons by stochastic processes
(IOP Publishing, 2011)
We present a newly developed numerical modulation model to study the transport of galactic and Jovian electrons in the heliosphere. The model employs stochastic differential equations (SDEs) to solve the corresponding ...
Jovian electrons in the inner heliosphere: proposing a new source spectrum based on 30 years of measurements
(EDP Sciences, 2018)
Context. Since the Pioneer 10 flyby of Jupiter it has become well known that electrons of Jovian origin dominate the lower MeV range of charged energetic particles in the inner heliosphere.
Aims. Because the Jovian source ...
A stochastic approach to galactic proton propagation: influence of the spiral arm structure
(Elsevier, 2014)
A newly developed numerical code solving Fokker–Planck type transport equations in currently four
dimensions (space plus momentum or energy) and time by means of stochastic differential equations
(SDEs) is applied to the ...
Modelling heliospheric current sheet drift in stochastic cosmic ray transport models
(Springer, 2012)
Drifts are one of the major cosmic ray modulation mechanisms in the heliosphere. Three types of drifts occur in the background heliospheric magnetic field, namely curvature, gradient and current sheet drifts. The last ...
Possible evidence for a Fisk-type heliospheric magnetic field. 1. Analyzing Ulysses/Ket electron observations
(IOP Publishing, 2011)
The propagation of energetic charged particles in the heliospheric magnetic field is one of the fundamental problems in heliophysics. In particular, the structure of the heliospheric magnetic field remains an unsolved ...
A stochastic differential equation code for multidimensional Fokker-Planck type problems
(Elsevier, 2012)
We present a newly developed numerical code that integrates Fokker–Planck type transport equations in four to six spatial dimensions (configuration plus momentum space) and time by means of stochastic differential equations. ...
Comparative time-series analysis of MeV electron data by Ulysses and Pioneer 10/11 in the Jovian magnetosphere
(Copernicus Publications, 2013)
The dynamics of the Jovian magnetosphere is dominated by the planet’s fast rotation with a period of 10 h.Within the magnetosphere, this periodicity can in particular be seen in the temporal variation of the spectral index ...
The effects of magnetic field modifications on the solar modulation of cosmic rays with a SDE-based model
(Elsevier, 2016)
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 the effects of modifying the heliospheric magnetic field, ...