TL dose measurements on board the Russian segment of the ISS by the "Pille" system during Expedition-11 and -12

The most advanced version of a thermoluminescent TL dosemeter system Pille-MKS consisting of ten CaSO 4 Dy bulb dosemeters and a compact reader developed by the KFKI Atomic Energy Research Institute KFKI AEKI and BL - Electronics for application in space is continuously in use on board the ISS since October 2003 The Pille-MKS dosimeter system is applied for the routine and EVA individual dosimetry of astronauts as part of the service system as well as for onboard experiments and operated by the Institute for Biomedical Problems IBMP It is unique providing accurate and high resolution TL dose data already on board the space station which became increasingly important during the suspension of the Space Shuttle flights Seven dosemeters are located at several places of the Russian segment of the ISS and read out once a month two dosemeters are dedicated for EVAs and one dosemeter is kept in the reader and read out automatically every 90 minutes providing high resolution in time dose measurements During particular events like coronal mass ejections hitting Earth incidental measuring campaigns are intercalated with frequent readouts In this paper we report results of dosimetric measurements made aboard the International Space Station during Expedition-11 and -12 using the Pille portable TLD system and compare them with our previous measurements on the ISS and previous space stations