Observation of the radiation environment and solar energetic particle events in Mars orbit in May 2018- June 2022

Semkova, Jordanka; Koleva, R.; Benghin, Victor; Krastev, Krasimir; Matviichuk, Yuri; Tomov, B.; Maltchev, Stephan; Dachev, Tsvetan; Bankov, N.; Митрофанов, И. Г.; Malakhov, A. V.; Golovin, D. V.; Litvak, M. L.; Санин, А. Б.; Kozyrev, A.; Мокроусов, М. И.; Nikiforov, S.; Lisov, Denis; Anikin, A. A.; Shurshakov, Vyacheslav; Drobyshev, Sergey; Gopalswamy, Ν.

doi:10.1016/j.lssr.2023.03.006

Cited by 7 publications

(3 citation statements)

References 53 publications

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“…The data, used in this paper, are part of the "Unified web-based database with Liulin-type instruments" that are available online, free of charge at the following URL: http://esapro.space.bas.bg/database. The database contains data from nine Liulin type experiments around the Earth and Liulin-MO data in the path to Mars (2016Mars ( -2017 and in Mars orbit (Since 2017) [Semkova et al, 2023]. Each data point contains up to 256 parameters, which except the measured values listed the time and space parameters of the carrier.…”

Section: Data Availabilitymentioning

confidence: 99%

“…In this paper, we present the numerical simulation results of the Liulin-MO instrument on board the Trace Gas Orbiter (TGO) of the ExoMars-2016 mission to Mars [Semkova et al, 2018], focusing on the two solar proton events (SPE) of October 2021 and February 2022 [Semkova et al, 2023]. With the help of the simulation it is shown what is the energy of the protons of these events.…”

Section: Introductionmentioning

confidence: 99%

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Fifteenth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere

2023

Fifteenth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere

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The Fifteenth Workshop "Solar Influences on the Magnetosphere, Ionosphere and Atmosphere" was held from June 5 to 9, 2023 in Primorsko, Bulgaria. 60 scientists from 17 countries participated in the workshop with 48 oral and 19 poster presentations. 23 papers are included in these Proceedings.The Scientific Organizing Committee and the Editors of the Proceedings thank all the participants in the Workshop and the contributors to the Proceedings.

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Section: Data Availabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fifteenth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere

2023

Fifteenth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere

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“…Over the past five decades, multitudes of in-situ measurements of GCRs with kinetic energies ranging from multi-MeV nuc −1 to multi-TeV nuc −1 have been conducted through experiments utilizing stratospheric balloons, orbiting satellites, space probes, and space stations (see Table 1 in Bindi et al 2017;Picozza et al 2018;Tomassetti 2023, and the references therein for the details). Besides, the detectors measuring the radiation doses posed by energetic particles can quantify the radiation level of GCRs and its temporal and spatial dependence (see the instruments in, e.g., Benton & Benton 2001;Caffrey & Hamby 2011;Dachev et al 2015;Honig et al 2019;Guo et al 2021;Sadykov et al 2021;Semkova et al 2023). Last but not least, the groundbased neutron monitors, which measure the GCR-induced secondary neutrons produced in Earth's atmosphere, can also indicate the GCR intensity and its variations over long periods (e.g., Feynman & Gabriel 2000;Bütikofer 2018).…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Comparison of Various Galactic Cosmic-Ray Models to the State-of-the-art Particle and Radiation Measurements

Liu,

Guo,

Wang

et al. 2024

ApJS

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Galactic cosmic rays (GCRs) are the slowly varying background energetic particles that originate outside the solar system, are modulated by the heliospheric magnetic field, and pose ongoing radiation hazards to deep space exploration missions. To assess the potential radiation risk, various models have been developed to predict the GCR flux near Earth based on propagation theories and/or empirical functions. It is essential to benchmark these models by validating against the state-of-the-art measurements. In this work, a comprehensive model–observation comparison of the energy-dependent particle flux has been performed, by combining five typical GCR models and observational data from the Cosmic Ray Isotope Spectrometer on board the Advanced Composition Explorer spacecraft at relatively lower energies and data from the Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics and Alpha Magnetic Spectrometer at higher energies. The analysis shows that, out of the five models investigated in this study, the optimal model, characterized by minimal relative difference or reduced chi-square divergence from measurements, depends on the particle type, energy range, and epoch of interest. Furthermore, a silicon slab is applied to compute the absorbed dose rate using conversion factors applied to GCR model outputs, and the results are compared to measurements from the Cosmic Ray Telescope for the Effects of Radiation. The comparisons in this paper have implications for the strengths and limitations of individual GCR models, advance our comprehension of the underlying GCR transport mechanisms, and also have strong application aspects for mitigating space radiation risks.

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Electrospun hexagonal boron nitride/CNT reinforced nanocomposite fiber mats for cosmic radiation shielding

Ersoy,

Özcan,

Kaya

et al. 2024

Vinyl Additive Technology

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A novel methodology is introduced to asses the efficacy of cosmic radiation shielding through the fabrication of electrospun nanocomposite fiber mats reinforced with hexagonal boron nitride (h‐BN) and carbon nanotubes (CNTs). These mats were fabricated using various h‐BN particles synthesized with 1 M boric acid and four distinct 1 M nitrogen sources to produce polyethylene oxide (PEO) nanofibers via the electrospinning method at 15 kV, a 43.0 μL/min pumping rate, and a 20 cm distance with a maximum thickness of 10 μm. High neutron shielding capability nanocomposite fibers denoted BN‐F4 (spun with h‐BN [melamine]/CNT powders in a 5 wt% PEO solution) and BN‐F5 (spun with h‐BN [urea]/CNT powders in a 5 wt% PEO solution) were produced. By calculating the theoretical photon transmittance and evaluating the neutron shielding efficiency with an Am‐Be neutron source and a BF3 neutron detector, the cosmic radiation shielding capability of nanocomposite mats was discussed. BN‐F4 and BN‐F5 exhibited neutron shielding properties of 7.124% and 6.37% for 3.82 and 1.87 g/mL, respectively. This research establishes a new benchmark in the fabrication of flexible, ultrathin, and lightweight radiation shielding materials and enhances the practicality of nanocomposites reinforced with h‐BN and CNTs by incorporating synthesizing and characterizing steps.Highlights In the study, hexagonal boron nitride production was carried out with four different nitrogen sources and which one showed better structural and morphological properties was supported by analysis. Additionally, an optimization study of nanofibers by electrospinning by adding CNT and h‐BN particles with PEO polymer is included. It is thought that the production of h‐BN and nanofiber work as a radiation shielding feature for use in space studies will be innovative and contribute to the deficiency in the literature.

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Observation of the radiation environment and solar energetic particle events in Mars orbit in May 2018- June 2022

Cited by 7 publications

References 53 publications

Fifteenth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere

Fifteenth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere

A Comprehensive Comparison of Various Galactic Cosmic-Ray Models to the State-of-the-art Particle and Radiation Measurements

Electrospun hexagonal boron nitride/CNT reinforced nanocomposite fiber mats for cosmic radiation shielding

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