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Radiation Protection Dosimetry 2005 116(1-4):374-379; doi:10.1093/rpd/nci262
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© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Space radiation measurements on-board ISS—the DOSMAP experiment

G. Reitz1,*, R. Beaujean2, E. Benton3, S. Burmeister2, Ts. Dachev4, S. Deme5, M. Luszik-Bhadra6 and P. Olko7

1 DLR, Aerospace Medicine, 51147 Köln, Germany
2 University Kiel, Extraterrestrik, 24118 Kiel, Germany
3 Eril Research Inc., Richmond, CA 94804-4557, USA
4 Bulgarian Academy of Science, 1113 Sofia, Bulgaria
5 KFKI Atomic Energy Research Institute, 1525 Budapest, Hungary
6 Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
7 Institute of Nuclear Physics, 31-342 Krakow, Poland

* Corresponding author: Guenther.Reitz{at}dlr.de

The experiment ‘Dosimetric Mapping’ conducted as part of the science program of NASA's Human Research Facility (HRF) between March and August 2001 was designed to measure integrated total absorbed doses (ionising radiation and neutrons), heavy ion fluxes and its energy, mass and linear energy transfer (LET) spectra, time-dependent count rates of charged particles and their corresponding dose rates at different locations inside the US Lab at the International Space Station. Owing to the variety of particles and energies, a dosimetry package consisting of thermoluminescence dosemeter (TLD) chips and nuclear track detectors with and without converters (NTDPs), a silicon dosimetry telescope (DOSTEL), four mobile silicon detector units (MDUs) and a TLD reader unit (PILLE) with 12 TLD bulbs as dosemeters was used. Dose rates of the ionising part of the radiation field measured with TLD bulbs applying the PILLE readout system at different locations varied between 153 and 231 µGy d–1. The dose rate received by the active devices fits excellent to the TLD measurements and is significantly lower compared with measurements for the Shuttle (STS) to MIR missions. The comparison of the absorbed doses from passive and active devices showed an agreement within ±10%. The DOSTEL measurements in the HRF location yielded a mean dose equivalent rate of 535 µSv d–1. DOSTEL measurements were also obtained during the Solar Particle Event on 15 April 2001.


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