J. Space Weather Space Clim.
Volume 5, 2015
|Number of page(s)||10|
|Published online||15 December 2015|
Matroshka DOSTEL measurements onboard the International Space Station (ISS)
Christian-Albrechts-Universität zu Kiel, Christian-Albrechts-Platz, 24118
2 German Aerospace Center (DLR), Institute of Aerospace Medicine, Linder Hoehe, 51147 Cologne, Germany
* Corresponding author: firstname.lastname@example.org
Accepted: 8 November 2015
This paper presents the absorbed dose and dose equivalent rate measurements achieved with the DOSimetry TElescope (DOSTEL) during the two Matroshka (MTR) experiment campaigns in 2004/2005 (MTR-1) and 2007/2008 (MTR-2B). The comparison between the inside (MTR-2B) and outside (MTR-1) mission has shown that the shielding thickness provided by the International Space Station (ISS) spacecraft hull has a minor effect on the radiation exposure caused by Galactic Cosmic Rays (GCR). The exposure varies with the solar modulation of the GCR, too. Particles from Earth’s radiation belts are effectively shielded by the spacecraft hull, and thus the contribution to the radiation exposure is lower for the inside measurement during MTR-2B. While the MTR-DOSTEL absorbed dose rate shows a good agreement with passive detectors of the MTR experiment for the MTR-2B mission phase, the MTR-1 absorbed dose rates from MTR-DOSTEL measurements are much lower than those obtained by a nearby passive detector. Observed discrepancies between the MTR-DOSTEL measurements and the passive detectors located nearby could be explained by the additional exposure to an enhanced flux of electrons trapped between L-parameter 2.5 and 3.5 caused by solar storms in July 2004.
Key words: Galactic cosmic rays / Radiation belts / Dosimetry / International Space Station / Matroshka
© J. Labrenz et al., Published by EDP Sciences 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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