EUROPEAN TECHNOLOGY EXPOSURE FACILITY - EXPOSURE EXPERIMENT - RADIATION RISKS
RADIOMETER-DOSIMETER (EUTEF-EXPOSE-R3D)
Research Area: Radiation Measurements and Shielding
Expedition(s): 16- 20
Principal Investigator(s): ● D.P. Häder, Friedrich-Alexander-Universität, Erlangen,
Germany
RESEARCH OBJECTIVES
The European Technology Exposure Facility -
Exposure Experiment - Radiation Risks Radiometer-
Dosimeter (EuTEF-Expose-R3D) is a device that
records, with time resolution, the dose of solar light
over 4 wavelength ranges (UV-A, UV-B, UV-C, and
photosynthetic active light) as well as the flux of
heavy cosmic particles.
RESULTS
Measurement frequency was 0.1 Hz. Due to errors in
data transmission or temporary termination of Expose
power, not all data could be acquired. Radiation was
not constant during the mission. The radiation dose during the mission was 1823.98 MJ m- 2 for
PAR, 269.03MJ m-2 for UV-A, 45.73 MJ m-2 for UV.B, or 18.28 MJ m-2 for UV-C. Registered sunshine
duration during the mission was about 152 days (about 27% of mission time).
The time profiles of the REP-generated daily fluences, and the absorbed doses at the orbit of ISS
during the period February 2008-August 2010 were analyzed in dependence of the daily Ap index
(a measure of the general level of geomagnetic activity over the globe for a given day) and
compared with the daily relativistic electron fluence with energies of more than 2 MeV measured.
PUBLICATION(S)
Dachev TP, Tomov BT, Matviichuk YN, et al. Relativistic electron fluxes and dose rate variations
observed on the International Space Station. Journal of Atmospheric and Solar-Terrestrial
Physics. July 2013;99:150-156. doi:10.1016/j.jastp.2012.07.007.
Dachev TP, Tomov BT, Matviichuk YN, et al. Relativistic electron fluxes and dose rate variations
during April - May 2010 geomagnetic disturbances in the R3DR data on ISS. Advances in Space
Research. July 2012;50(2):282-292. doi: 10.1016/j.asr.2012.03.028.
Dachev TP, Horneck G, Häder D, et al. Time profile of cosmic radiation exposure during the
EXPOSE-E mission: The R3DE instrument. Astrobiology. May 2012;12(5):403-411. doi:
10.1089/ast.2011.0759.
The European Technology Exposure Facility -
Exposure Experiment - Radiation Risks
Radiometer-Dosimeter. ESA image.