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Radiation environment on TGO Mars orbit during solar particle events in January–October 2024. Corresponding solar eruptions and GOES proton fluxes data
Gopalswamy, Nat; Semkova, Jordanka; Koleva, Rositza +16 more
The dosimeter Liulin-MO for measuring the radiation environment on board the ExoMars Trace Gas Orbiter (TGO) is a module in the Fine Resolution Epithermal Neutron Detector (FREND). A number of solar energetic particle (SEP) events were observed in Mars orbit from July 2021 to 2024 during the increasing phase and close to the maximum of the 25th so…
Observation of the radiation environment and solar energetic particle events in Mars orbit in May 2018- June 2022
Gopalswamy, Nat; Semkova, Jordanka; Koleva, Rositza +19 more
The dosimeter 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). Here we present results from measurements of the charged particle fluxes, dose rates and estimation of dose equivalent rates at ExoMars TGO Mars science orbit, provided …
Comparison of the particle flux measured by Liulin-MO dosimeter in ExoMars TGO science orbit with those calculated by models
Guo, Jingnan; Semkova, Jordanka; Benghin, Victor +10 more
The knowledge of the space radiation environment in spacecraft transition and in Mars vicinity is of importance for the preparation of the human exploration of Mars. ExoMars Trace Gas Orbiter (TGO) was launched on March 14, 2016 and was inserted into circular Mars science orbit (MSO) with a 400 km altitude in March 2018. The Liulin-MO dosimeter is…
Solar modulation of the GCR flux and dose rate, observed in space between 1991 and 2019
Dachev, Tsvetan P.; Tomov, Borislav T.; Matviichuk, Yuri N. +7 more
The paper presents the solar modulation of the long-term galactic cosmic rays (GCR) flux and dose rates variations, observed during 14 space experiments by 10 Bulgarian build Liulin-type spectrometers (LTS) (Dachev et al., 2015a). They worked in near Earth space and in the interplanetary radiation environment between January 1991 and January 2019.…