Abstract Space radiation has been monitored successfully using the Radiation Risks Radiometer-Dosimeter (R3D) installed at the ESA EXPOSE-R (R3DR) facility outside of the Russian Zvezda module of the International Space Station (ISS) between March 2009 and January 2011. R3DR is a Liulin type spectrometer–dosimeter with a single Si PIN detector 2cm2 of area and 0.3mm thick. The R3DR instrument accumulated about 2 million measurements of the absorbed dose rate and flux of 10s resolution. The total external and internal shielding before the detector of R3DR device is 0.41gcm−2. The calculated stopping energy of normally incident particles to the detector is 0.78MeV for electrons and 15.8MeV for protons. After the Coronal Mass Ejection (CME) at 09:54 UTC on 3 April 2010, a shock was observed at the ACE spacecraft at 0756 UTC on 5 April, which led to a sudden impulse on Earth at 08:26 UTC. Nevertheless, while the magnetic substorms on 5 and 6 of April were moderate; the second largest in history of GOES fluence of electrons with energy >2MeV was measured. The R3DR data show a relatively small amount of relativistic electrons on 5 April. The maximum dose rate of 2323μGyday−1 was reached on 7 April; by 9 April, a dose of 6600μGy was accumulated. By the end of the period on 7 May 2010 a total dose of 11,587μGy was absorbed. Our data were compared with AE-8 MIN, CRESS and ESA-SEE1 models using SPENVIS and with similar observations on American, Japanese and Russian satellites.
Relativistic electron fluxes and dose rate variations during April–May 2010 geomagnetic disturbances in the R3DR data on ISS
Advances in Space Research ; 50 , 2 ; 282-292
2012-03-24
11 pages
Article (Journal)
Electronic Resource
English
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