NEW RESULTS FROM THE RADIATION INVESTIGATIONS ABOARD EXOMARS TGO IN 2018–2023 Доклады на конференциях
Язык | Английский | ||||||||||||
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Тип доклада | Устный | ||||||||||||
Url доклада | https://ms2023.cosmos.ru/docs/2023/14ms3_ABSTRACT_BOOK-2023-12-06.pdf | ||||||||||||
Конференция |
14th Moscow Solar System Symposium 09-13 окт. 2023 , Москва |
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Реферат:
The dosimetric telescope Liulin-MO for measuring the radiation environment onboard the ExoMars Trace Gas Orbiter (TGO) is a module of the Fine Resolution Epithermal Neutron Detector (FREND) [1–2]. Presented are the main results from the measurements in TGO Mars science orbit (400 km altitude, 74° inclination) of the radiation characteristics of the galactic cosmic rays (GCR) and solar energetic particle (SEP) events provided by Liulin-MO during different phases of the solar cycle in the period 2018–2023. The results show that the dose rate and particle flux of GCR in June 2023 during the increasing phase of the 25th solar cycle are about 55 % of the corresponding values measured during the 24th solar cycle minimum in March – August 2020. Eight SEP events are registered in Mars orbit from July 2021 to June 2023. The 15–19 February 2022 SEP event is the most powerful in our data. During this event the SEPs dose is equal to the dose for 38 days from GCR in undisturbed conditions, the biologically significant dose equivalent from SEPs is equal to the dose equivalent for 13 days from GCR in undisturbed conditions. The doses from 28–31 October 2021 SEP event are about 2 times less. Measurements by Liulin-MO during SEP events are compared to measurements by other instruments in the heliosphere. Discussed are comparisons between the measured and simulated dose rates and particle flux from GCR and albedo radiation in Mars orbit [3–4]. The results of the radiation measurements on TGO are of importance for benchmarking of the space radiation environment models and for assessment of the radiation risk to future manned and robotic missions to Mars.
REFERENCES:
[1] Mitrofanov I., Malakhov A., Bakhtin B. et al. Fine Resolution Epithermal Neutron Detector (FREND) onboard the ExoMars Trace Gas Orbiter // Space Science Reviews. 2018. V. 214. Art. No. 86. https://doi.org/10.1007/s11214-018-0522-5.
[2] Semkova J., Koleva R., Benghin V. et al. Charged particles radiation measurements with Liulin-MO dosimeter of FREND instrument aboard ExoMars Trace Gas Orbiter during the transit and in high elliptic Mars orbit // Icarus. 2018. V. 303. P. 53–66. https://doi.org/10.1016/j.icarus.2017.12.034.
[3] Semkova J., Benghin V., Guo J. et al. Comparison of the flux measured by Liulin-MO dosimeter in ExoMars TGO science orbit with the calculations // Life
Sciences in Space Research. 2022. https://doi.org/10.1016/j.lssr.2022.08.007
[4] Weihao L., Guo J., Zhang J., Semkova J. et al. Modeling the Radiation Environment of Energetic Particles at Mars Orbit and a First Validation against TGO Measurements // The Astrophysical J. 2023. V. 949. No. 2. P. 949–77. DOI: 10.3847/1538-4357/acce3c.
Библиографическая ссылка:
Semkova J.
, Koleva R.
, Benghin V.
, Krastev K.
, Matviichuk Y.
, Tomov B.
, Bankov N.
, Maltchev S.
, Dachev T.
, Mitrofanov I.
, Golovin D.
, Mokrousov M.
, Litvak M.
, Kozyrev A.
, Shurshakov V.
, Drobyshev S.
, Guo J.
, Zhang J.
, Liu W.
NEW RESULTS FROM THE RADIATION INVESTIGATIONS ABOARD EXOMARS TGO IN 2018–2023
14th Moscow Solar System Symposium 09-13 Oct 2023
NEW RESULTS FROM THE RADIATION INVESTIGATIONS ABOARD EXOMARS TGO IN 2018–2023
14th Moscow Solar System Symposium 09-13 Oct 2023