Relativistic electron fluxes and dose rate variations during April–May 2010 geomagnetic disturbances in the R3DR data on ISS

Dachev, Ts.; Tomov, B.; Matviichuk, Yu.; Dimitrov, P.; Bankov, N.; Reitz, G.; Horneck, G.; Häder, Donat-Peter; Lebert, Michael; Schuster, Martin

doi:10.1016/j.asr.2012.03.028

Cited by 14 publications

(18 citation statements)

References 22 publications

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“…The wide maximum in L values between 3.5 and 6.2 has to do with the observations of sporadic relativistic electron (blue points) precipitations generated in the ORB (Dachev et al, , 2011c). Single 10 s ORB measurements can deliver a maximum of ISS dose rate values up to 20,000 lGy h -1 .…”

Section: Data Selection Proceduresmentioning

confidence: 99%

“…The electron flux may cause problems for components located outside a spacecraft (e.g., solar cell degradation). They do not have enough energy to penetrate a heavily shielded spacecraft such as the ISS wall but may deliver large additional doses to astronauts during extravehicular activity (Dachev et al, , 2011c. The main absorbed dose inside the ISS is contributed by the protons of the inner radiation belt.…”

Section: Near-earth Radiation Environmentmentioning

confidence: 99%

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Time Profile of Cosmic Radiation Exposure During the EXPOSE-E Mission: The R3DE Instrument

Dachev

Horneck

Häder³

et al. 2012

Astrobiology

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The aim of this paper is to present the time profile of cosmic radiation exposure obtained by the Radiation Risk Radiometer-Dosimeter during the EXPOSE-E mission in the European Technology Exposure Facility on the International Space Station's Columbus module. Another aim is to make the obtained results available to other EXPOSE-E teams for use in their data analysis. Radiation Risk Radiometer-Dosimeter is a low-mass and small-dimension automatic device that measures solar radiation in four channels and cosmic ionizing radiation as well. The main results of the present study include the following: (1) three different radiation sources were detected and quantified-galactic cosmic rays (GCR), energetic protons from the South Atlantic Anomaly (SAA) region of the inner radiation belt, and energetic electrons from the outer radiation belt (ORB); (2) . The analysis of the UV and temperature data is a subject of another article (Schuster et al., 2012).

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Section: Data Selection Proceduresmentioning

confidence: 99%

Section: Near-earth Radiation Environmentmentioning

confidence: 99%

Time Profile of Cosmic Radiation Exposure During the EXPOSE-E Mission: The R3DE Instrument

Dachev

Horneck

Häder³

et al. 2012

Astrobiology

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show abstract

“…GCR protons in equatorial and low latitude regions have very small fluxes of less than 1 particle cm À 2 s À 1 , which is why the dose rate to flux ratio (D/F) is not stable and varies in the range from 0.03 to 30 nGy cm 2 part À 1 (please refer to Fig. 5 of Dachev et al, 2012b). This variation makes the SD inapplicable for characterization of the GCR radiation source.…”

Section: All Data Presentationmentioning

confidence: 95%

“…We do not have a reasonable explanation of the increase of the specific doses seen between 2nd and 12th May 2013. During the analysis of the data from ISS a selection procedure was established to distinguish between the three expected radiation sources: (i) GCR particles, (ii) protons in the SAA region of the IRB and (iii) relativistic electrons in the ORB (Haffner, 1971;Dachev, 2009;Dachev et al, 2012b). It was shown that the dose to flux ratio or specific dose (SD) can characterize the type of the predominant radiation source in Liulin-type instruments in the near-Earth radiation field.…”

Section: All Data Presentationmentioning

confidence: 99%

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“BION-M” No. 1 spacecraft radiation environment as observed by the RD3-B3 radiometer-dosimeter in April–May 2013

Dachev

Tomov

Matviichuk

et al. 2015

Journal of Atmospheric and Solar-Terrestrial Physics

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Overview of the ISS Radiation Environment Observed during the ESA EXPOSE‐R2 Mission in 2014–2016

et al. 2017

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The radiation risk radiometer‐dosimeter (R3D)‐R2 solid‐state detector performed radiation measurements at the European Space Agency EXPOSE‐R2 platform outside of the Russian “Zvezda” module at the International Space Station (ISS) from 24 October 2014 to 11 January 2016. The ISS orbital parameters were average altitude of 415 km and 51.6° inclination. We developed special software and used experimentally obtained formulas to determine the radiation flux‐to‐dose ratio from the R3DR2 Liulin‐type deposited‐energy spectrometer. We provide for the first time simultaneous, long‐term estimates of radiation dose external to the ISS for four source categories: (i) galactic cosmic ray particles and their secondary products; (ii) protons in the South Atlantic Anomaly region of the inner radiation belt (IRB); (iii) relativistic electrons and/or bremsstrahlung in the outer radiation belt (ORB); and (iv) solar energetic particle (SEP) events. The latter category is new in this study. Additionally, in this study, secondary particles (SP) resulting from energetic particle interaction with the detector and nearby materials are identified. These are observed continuously at high latitudes. The detected SPs are identified using the same sorting requirements as SEP protons. The IRB protons provide the highest consistent hourly dose, while the ORB electrons and SEPs provide the most extreme hourly doses. SEPs were observed 11 times during the study interval. The R3DR2 data support calculation of average equivalent doses. The 30 day and 1 year average equivalent doses are much smaller than the skin and eyes doses recommendations by the National Council on Radiation Protection (Report 132), which provides radiation protection guidance for Low Earth Orbit.

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Relativistic electron fluxes and dose rate variations during April–May 2010 geomagnetic disturbances in the R3DR data on ISS

Cited by 14 publications

References 22 publications

Time Profile of Cosmic Radiation Exposure During the EXPOSE-E Mission: The R3DE Instrument

Time Profile of Cosmic Radiation Exposure During the EXPOSE-E Mission: The R3DE Instrument

“BION-M” No. 1 spacecraft radiation environment as observed by the RD3-B3 radiometer-dosimeter in April–May 2013

Overview of the ISS Radiation Environment Observed during the ESA EXPOSE‐R2 Mission in 2014–2016

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