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A ready-to-use galactic cosmic ray model

Matthiä, Daniel and Berger, Thomas and Mrigakshi, Alankrita I. and Reitz, Günther (2012) A ready-to-use galactic cosmic ray model. Advances in Space Research, 51 (3), pp. 329-338. Elsevier. DOI: 10.1016/j.asr.2012.09.022.

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Abstract

Galactic cosmic ray nuclei close to Earth are of great importance in different fields of research. By studying their intensity in near-Earth interplanetary space and modeling their modulation in the heliosphere it is possible to gain knowledge both about the structure of the heliosphere and the transport processes within. Additionally, secondary phenomena like cloud formation, ionization processes in the atmosphere, cosmogenic nuclide production and radiation exposure in space and at aviation altitudes are related to the intensity of the galactic cosmic rays and their modulation in the heliosphere. In order to improve the knowledge about these processes and underlying mechanisms it is often beneficial to perform numerical simulations. A necessary prerequisite for such simulations is a model describing the galactic cosmic ray intensities for all particle types and energies of importance. Several of these models exist in the literature. However, many of these do not provide essential characteristics like the description of heavier nuclei or it is difficult to associate them to recent or actual solar modulation conditions. In this work a model is presented which describes the galactic cosmic ray spectra of nuclei based on a single parameter. The values of this parameter for different solar modulation conditions are derived from measurements of the Advanced Composition Explorer (ACE) spacecraft and Oulu neutron monitor count rates. Comparing the galactic cosmic ray spectra predicted by the model to a comprehensive set of experimental data from literature shows very good agreement.

Document Type:Article
Title:A ready-to-use galactic cosmic ray model
Authors:
AuthorsInstitution or Email of Authors
Matthiä, DanielGerman Aerospace Center, Institute of Aerospace Medicine, Linder Höhe, 51147 Cologne, Germany
Berger, ThomasGerman Aerospace Center, Institute of Aerospace Medicine, Linder Höhe, 51147 Cologne, Germany
Mrigakshi, Alankrita I.German Aerospace Center, Institute of Aerospace Medicine, Linder Höhe, 51147 Cologne, Germany
Reitz, GüntherGerman Aerospace Center, Institute of Aerospace Medicine, Linder Höhe, 51147 Cologne, Germany
Date:2012
Journal or Publication Title:Advances in Space Research
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:51
DOI:10.1016/j.asr.2012.09.022
Page Range:pp. 329-338
Publisher:Elsevier
Status:Published
Keywords:Galactic Cosmic Rays, Solar modulation, Neutron monitors, Solar activity, Sun spot number
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Strahlenbiologie
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kerstin Kopp
Deposited On:07 Nov 2012 11:57
Last Modified:07 Mar 2013 10:10

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