dc.contributor.author | Ivaschenko, Alex | |
dc.contributor.author | Spanier, Felix | |
dc.contributor.author | Ganse, Urs | |
dc.date.accessioned | 2018-09-03T13:18:32Z | |
dc.date.available | 2018-09-03T13:18:32Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | Ivascenko, A. et al. 2015. New method for determination of diffusion coefficients in turbulent plasmas. The 34th International Cosmic Ray Conference, 30 July-6 August, The Hague, The Netherlands. Proceedings of science, 236: Article no 208. [https://doi.org/10.22323/1.236.0208] | en_US |
dc.identifier.issn | 1824-8039 (Online) | |
dc.identifier.uri | http://hdl.handle.net/10394/30879 | |
dc.identifier.uri | https://doi.org/10.22323/1.236.0208 | |
dc.identifier.uri | https://pos.sissa.it/236/208/pdf | |
dc.description.abstract | The transport of charged particles in turbulent magnetic fields is a topic of great interest in as-
trophysics, since our ability to successfully use cosmic rays as astronomic messengers depends
on our understanding of the transport processes. One of the primary effects is the scattering of
particles on magnetic irregularities leading in the first instance to a change in the pitch angle
μ
of
the particle. Further transport parameters e.g. diffusion coefficients or the mean free path can then
be inferred from
∆
μ
. We introduce new numerical methods to evaluate the pitch angle diffusion
coefficient
D
μ μ
and the perpendicular diffusion coefficient
D
⊥
that work well in both weak and
strong turbulence scenarios and compare with analytic results from Quasi Linear Theory.
We present results obtained by applying these methods to test-particle data from simulation of
heliospheric conditions with our spectral MHD code Gismo. The results are then compared to
test-particle simulations of the novel Perlin-noise-type pseudo-turbulence to show its viability for
large-scale particle transport simulations | en_US |
dc.language.iso | en | en_US |
dc.publisher | Sissa Medialab | en_US |
dc.title | New method for determination of diffusion coefficients in turbulent plasmas | en_US |
dc.type | Presentation | en_US |
dc.contributor.researchID | 24790052 - Ivascenko, Alex | |
dc.contributor.researchID | 25161814 - Spanier, Felix Alexander | |