Planetary Distribution of the Space Radiation Dose Rate Based on Results of the DEPRON Experiment Onboard the Lomonosov Satellite

• Published in: Cosmic research 2022, Vol.60 (2), p.73-78
• Main Authors: Zolotarev, I. A., Benghin, V. V., Yushkov, B. Yu, Nechaev, O. Yu, Petrov, V. L., Yashin, I. V.
• Format: Article
• Language: English
• Subjects: Altitude; Aluminum; Astronomy; Astrophysics and Astroparticles; Astrophysics and Cosmology; Circular orbits; Extraterrestrial radiation; Latitude; Outer radiation belt; Physics; Physics and Astronomy; Polar caps; Radiation; Radiation belts; Radiation dosage; Radiation shielding; Space Exploration and Astronautics; Space Sciences (including Extraterrestrial Physics
• ISSN: 0010-9525; 1608-3075
• DOI: 10.1134/S0010952522020071

In 2016–2017, dosimetric studies were carried out on the Lomonosov satellite of the radiation environment in a circular orbit with an altitude of about 500 km and an inclination of 98°. The studies were carried out using a DEPRON device, in which two semiconductor detectors were located behind shielding of 0.54 and 0.81 g/cm 2 of aluminum. The planetary distribution of the radiation absorbed dose rate at the altitude of the Lomonosov was obtained, which was separated into four characteristic regions: the zone of low and middle latitudes, the zone of the South Atlantic anomaly, the zone of the outer radiation belt of the Earth, and the high-latitude zone of the polar caps. The average daily values of the dose rates measured during the day in each of these areas have been determined. The strongest variations (up to an order of magnitude) are experienced by the daily dose in the outer zone. The existence of the relationship between dose-rate variations in the outer belt and the level of geomagnetic disturbance was confirmed.