The radiation environment on the surface of Mars – Numerical calculations of the galactic component with GEANT4/PLANETOCOSMICS

Publication date: Available online 1 April 2017 Source:Life Sciences in Space Research Author(s): Daniel Matthiä, Thomas Berger Galactic cosmic radiation and secondary particles produced in the interaction with the atmosphere lead to a complex radiation field on the Martian surface. A workshop (“1st Mars Space Radiation Modeling Workshop”) organized by the MSL-RAD science team was held in June 2016 in Boulder with the goal to compare models capable to predict this radiation field with each other and measurements from the RAD instrument onboard the curiosity rover taken between 15 November 2015 and 15 January 2016. In this work the results of PLANETOCOSMICS/GEANT4 contributed to the workshop are presented. Calculated secondary particle spectra on the Martian surface are investigated and the radiation field's directionality of the different particles in dependence on the energy is discussed. Omnidirectional particle fluxes are used in combination with fluence to dose conversion factors to calculate absorbed dose rates and dose equivalent rates in a slab of tissue.
Source: Life Sciences in Space Research - Category: Biology Source Type: research