Results of monitoring variations of absorbed dose rate onboard the International Space Station during the period 2005–2011

Lishnevskii, A. E.; Panasyuk, M. I.; Nechaev, O. Yu.; Benghin, Victor; Petrov, V. M.; Volkov, A. N.; Lyagushin, V. I.; Nikolaev, Igor

doi:10.1134/s0010952512050036

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…We only want to show some baseline comparison in order to bring the measurements performed with the DOSTEL instruments in an overall ISS perspective. For example, four silicon detectors (DB-8) are used for operational dosimetry in the Russian Zvezda module (Lishnevskii et al 2010(Lishnevskii et al , 2012a(Lishnevskii et al , 2012b. These units are at distinct positions with various average shielding thicknesses and provide absorbed dose values in silicon for GCR and SAA contributions separately.…”

Section: Results In Comparison With Other Radiation Detectors Onboardmentioning

confidence: 99%

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DOSIS & DOSIS 3D: radiation measurements with the DOSTEL instruments onboard the Columbus Laboratory of the ISS in the years 2009–2016

Berger

Burmeister

Matthiä

et al. 2017

J. Space Weather Space Clim.

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The natural radiation environment in Low Earth Orbit (LEO) differs significantly in composition and energy from that found on Earth. The space radiation field consists of high energetic protons and heavier ions from Galactic Cosmic Radiation (GCR), as well as of protons and electrons trapped in the Earth's radiation belts (Van Allen belts). Protons and some heavier particles ejected in occasional Solar Particle Events (SPEs) might in addition contribute to the radiation exposure in LEO. All sources of radiation are modulated by the solar cycle. During solar maximum conditions SPEs occur more frequently with higher particle intensities. Since the radiation exposure in LEO exceeds exposure limits for radiation workers on Earth, the radiation exposure in space has been recognized as a main health concern for humans in space missions from the beginning of the space age on. Monitoring of the radiation environment is therefore an inevitable task in human spaceflight. Since mission profiles are always different and each spacecraft provides different shielding distributions, modifying the radiation environment measurements needs to be done for each mission. The experiments ''Dose Distribution within the ISS (DOSIS)'' (2009-2011) and ''Dose Distribution within the ISS 3D (DOSIS 3D)'' (2012-onwards) onboard the Columbus Laboratory of the International Space Station (ISS) use a detector suite consisting of two silicon detector telescopes (DOSimetry TELescope = DOSTEL) and passive radiation detector packages (PDP) and are designed for the determination of the temporal and spatial variation of the radiation environment. With the DOSTEL instruments' changes of the radiation composition and the related exposure levels in dependence of the solar cycle, the altitude of the ISS and the influence of attitude changes of the ISS during Space Shuttle dockings inside the Columbus Laboratory have been monitored. The absorbed doses measured at the end of May 2016 reached up to 286 lGy/day with dose equivalent values of 647 lSv/day.

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Section: Results In Comparison With Other Radiation Detectors Onboardmentioning

confidence: 99%

“…The altitude of the ISS has increased since the beginning of the DOSIS experiment in 2009 from 335 km to 420 km. Its influence on the contribution from GCR is negligible, but it strongly correlates with the dose contributions from the crossings of the SAA (see also Lishnevskii et al 2012b).…”

Section: Iss Altitude Influence On the Absorbed Dose Rate Of Saamentioning

confidence: 97%

DOSIS & DOSIS 3D: radiation measurements with the DOSTEL instruments onboard the Columbus Laboratory of the ISS in the years 2009–2016

Berger

Burmeister

Matthiä

et al. 2017

J. Space Weather Space Clim.

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“…Only a few papers have shown data from the period under study here and have been published recently (Lishnevskii et al 2012;Semkova et al 2013Semkova et al , 2014Berger et al 2015;Smith et al 2015;Dachev et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Radiation survey in the International Space Station

Narici

Casolino

Fino

et al. 2015

J. Space Weather Space Clim.

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The project ALTEA-shield/survey is part of an European Space Agency (ESA) -ILSRA (International Life Science Research Announcement) program and provides a detailed study of the International Space Station (ISS) (USLab and partly Columbus) radiation environment. The experiment spans over 2 years, from September 20, 2010 to September 30, 2012, for a total of about 1.5 years of effective measurements. The ALTEA detector system measures all heavy ions above helium and, to a limited extent, hydrogen and helium (respectively, in 25 Mev-45 MeV and 25 MeV/n-250 MeV/n energy windows) while tracking every individual particle. It measures independently the radiation along the three ISS coordinate axes. The data presented consist of flux, dose, and dose equivalent over the time of investigation, at the different surveyed locations. Data are selected from the different geographic regions (low and high latitudes and South Atlantic Anomaly, SAA). Even with a limited acceptance window for the proton contribution, the flux/dose/dose equivalent results as well as the radiation spectra provide information on how the radiation risks change in the different surveyed sites. The large changes in radiation environment found among the measured sites, due to the different shield/mass distribution, require a detailed Computer-Aided Design (CAD) model to be used together with these measurements for the validation of radiation models in space habitats. Altitude also affects measured radiation, especially in the SAA. In the period of measurements, the altitude (averaged over each minute) ranged from 339 km to 447 km. Measurements show the significant shielding effect of the ISS truss, responsible for a consistent amount of reduction in dose equivalent (and so in radiation quality). Measured Galactic Cosmic Ray (GCR) dose rates at high latitude range from 0.354 ± 0.002 nGy/s to 0.770 ± 0.006 nGy/s while dose equivalent from 1.21 ± 0.04 nSv/s to 6.05 ± 0.09 nSv/s. The radiation variation over the SAA is studied. Even with the reduced proton sensitivity, the high day-by-day variability, as well as the strong altitude dependence is clearly observed. The ability of filtering out this contribution from the data is presented as a tool to construct a radiation data set well mimicking deep space radiation, useful for model validations and improvements.

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