DOSTEL measurements as part of DOSIS/DOSIS3D: An update

Abstract

In the frame of the DOSIS / DOSIS3D Experiments two DOSTEL units are utilized to measure the radiation environment inside the COLUMBUS module of the International Space Station. DOSIS and its successor DOSIS3D measure the radiation dose induced by Galactic Cosmic Rays, Radiation Belt Particles and Solar Energetic Particles. The instruments are operative for more than 13 years since 2009. This means more than one half of a 22-year solar cycle is covered by the experiment by now. The variation of the radiation field inside the station depends on this solar cycle as well as the geomagnetic shielding by the earth’s magnetosphere. The data gathered over this long period of time will be presented as well as the plans for the future. We are currently preparing DOSTEL3D, a three-axis-telescope for the station. DOSTEL3D shall replace the two DOSTEL instruments by modern electronics to increase the energy- and time resolution. It is planned to operate the current DOSTEL units simultaneously with the new system to have good inflight cross calibration to have a continuous comparable data set. The current status of DOSTEL 3D will be presented as well as its design.