Showing papers by "Giovanni Santin published in 2013"
Abstract: The impact of high energy electrons in multi-layered shielding structures has been measured in terms of dose enhancement effects. New dosimetric data from a series of extensive experimental tests have been obtained and compared to the latest electromagnetic physics models included in the Geant4 Monte Carlo toolkit.
14 citations
TL;DR: In this paper, the uncertainties in the Jovian radiation environment data, and subsequently the models and underlying data are presented with an approach to defining a margin policy for the Ganymede orbit.
Abstract: Several models of the high energy electron radiation environment in the Jovian system have been constructed, based on a limited set of data, principally from Voyager 1 and 2 and Galileo. The design of future missions to this harsh radiation environment requires characterisation of the environment and its uncertainties. From the uncertainties a margin policy can be established to ensure robustness in design without costly over engineering. The uncertainties in the Jovian radiation environment data, and subsequently the models and underlying data are presented with an approach to defining a margin policy for the Ganymede orbit.
8 citations
TL;DR: In this paper, the internal arrangement of a spacecraft may be the key to the radiation environment within it, and guidelines for interplanetary manned mission design are presented using these findings.
Abstract: Radiation shielding is of primary importance in the planning of new interplanetary manned missions, and the ISS represents the largest laboratory for radiation shielding in space ever built. The ISS radiation environment has been thoroughly characterised by the Monte Carlo-based high-energy physics toolkit Geant4. It has been found that the ISS structure is quite effective at shielding from most forms of radiation, largely due to its internal arrangement. The internal environment found is consistent with literature values and astronaut dosimetry, and results indicate that the internal arrangement of a spacecraft may be the key to the radiation environment within it. Simulation results are also presented for the interplanetary case, including detailed comparisons with other codes. Guidelines for interplanetary manned mission design are presented using these findings.
6 citations