Radiation Measurements with Passive Detectors in the Columbus Module over One Solar Cycle within the DOSIS and DOSIS 3D projects

Kurzfassung

Within the framework of the DOSIS (2009 – 2011) and DOSIS 3D (2012 –) projects the radiation environment in the Columbus module of the International Space Station (ISS) was and is monitored using active and passive radiation detector systems. The experiment isperformed by universities and research institutes from several countries under the project and science lead of DLR. The data for the passive radiation detectors has been collected almost continuously since 2009, except for a period of about two years between mid 2010 to mid of 2012. This long mission duration makes it possible to study the effects of the solar activity and the changes of the ISS altitude on the dosimetric quantities. The presentation will focus on the results obtained by the Centre for Energy Research (EK) with solid state nuclear track detectors (SSNTDs) and thermoluminescent dosimeters (TLDs). These are integrated in 11 passive dosimetry packages (PDPs), one of them containing detectors arranged in three orthogonal directions (Triple PDP), which are installed inside Columbus at locations with different shielding conditions. From the huge amount of data gathered until 2022, some selected LET spectra and the variation of the absorbed dose and dose equivalent values will be presented.