DOSIS AND DOSIS 3D – ACTIVE AND PASSIVE RADIATION MEASUREMENTS IN COLUMBUS FROM 2009 – 2026

Kurzfassung

The radiation environment encountered in space differs in nature from that on Earth, consisting mostly of highly energetic ions from protons up to iron, resulting in radiation levels far exceeding the ones present on Earth for occupational radiation workers. Since the beginning of the space era the radiation exposure during space missions has been monitored with various passive and active radiation instruments. Also, on-board the International Space Station (ISS) a number of area monitoring devices provide data related to the spatial and temporal variation of the radiation field in – and outside the ISS. The aim of the DOSIS (2009 – 2011) and DOSIS 3D (2012 - ongoing) experiment is the measurement of the radiation environment within the European Columbus Laboratory of the ISS. These measurements are, on the one hand, performed with passive radiation detector packages (PDPs) mounted at eleven locations within Columbus for the determination of the spatial distribution of the radiation field parameters and, on the other hand, with two active radiation detectors (DOSimetry TELescope =DOSTEL) mounted at a fixed position inside Columbus for the determination of the temporal variation of the radiation field parameters. Up to summer of 2026 a total number of 30 long-term exposures of the PDPs have taken place inside Columbus with a total measurement duration of almost 5500 days. Data from the two DOSTEL instruments cover a total measurement time of over 8500 days from 2009 – 2026. The talk will give an overview of the current results of the dataevaluation performed for the passive and active radiation detectors in the years 2009 – 2026.