Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 71169 10.12737/stp-101202403 Results of current research Results of current research Results of current research Transfer of auroral kilometric radiation through low-density channels at the boundary of plasmasphere Transfer of auroral kilometric radiation through low-density channels at the boundary of plasmasphere Колпак Валерия Игоревна Kolpak Valeria Igorevna lera.kolpak@yandex.ru Могилевский Михаил Менделевич Mogilevsky Michael Mendelevich mogilevsky2012@gmail.com

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 https://orcid.org/0000-0002-5809-0921 Чугунин Дмитрий Владимирович Chugunin Dmitriy Vladimirovich dimokch@mail.ru Чернышов Александр Александрович Chernyshov Aleksandr Aleksandrovich achernyshov@iki.rssi.ru Моисеенко Ирина Леонидовна Moiseenko Irina Leonidovna moiseenko.irine@gmail.com Институт космических исследований РАН Москва Россия Space Research Institute of RAS Moscow Russian Federation Национальный исследовательский университет «Высшая школа экономики» Москва Россия National Research University “Higher School of Economics” Moscow Russian Federation Институт космических исследований РАН Москва Россия Space Research Institute of RAS Moscow Russian Federation Институт космических исследований РАН Москва Россия Space Research Institute of RAS Moscow Russian Federation Институт космических исследований РАН Москва Россия Space Research Institute of RAS Moscow Russian Federation Институт космических исследований РАН Москва Россия Space Research Institute of RAS Moscow Russian Federation 26 03 2024 26 03 2024 10 1 19 28 11 10 2023 28 12 2023 https://zh-szf.ru/en/nauka/article/71169/view

We present the results of Auroral Kilometric Radiation (AKR) measurements near the plasmapause on the ERG (Arase) satellite. The apogee of the satellite's orbit is located near the ecliptic plane, at latitudes ±30°. According to the generally accepted point of view, AKR observation is impossible in this region since it is shielded by the plasmasphere. Simultaneous measurements of AKR and local plasma density made it possible to determine that AKR in near-equatorial regions occur in plasma channels — density inhomogeneities elongated along magnetic field lines. AKR from sources located in the auroral magnetosphere is transferred by these channels to the equatorial region. This work analyzes the conditions for the capture and propagation of AKR in low plasma density channels. In the geometrical optics approximation, we have simulated the conditions for the radiation capture and propagation. The calculation results show that the proposed scheme for AKR capture into plasma channels can explain the measurement results — the radiation transfer from the auroral region to the near-equatorial region.

We present the results of Auroral Kilometric Radiation (AKR) measurements near the plasmapause on the ERG (Arase) satellite. The apogee of the satellite's orbit is located near the ecliptic plane, at latitudes ±30°. According to the generally accepted point of view, AKR observation is impossible in this region since it is shielded by the plasmasphere. Simultaneous measurements of AKR and local plasma density made it possible to determine that AKR in near-equatorial regions occur in plasma channels — density inhomogeneities elongated along magnetic field lines. AKR from sources located in the auroral magnetosphere is transferred by these channels to the equatorial region. This work analyzes the conditions for the capture and propagation of AKR in low plasma density channels. In the geometrical optics approximation, we have simulated the conditions for the radiation capture and propagation. The calculation results show that the proposed scheme for AKR capture into plasma channels can explain the measurement results — the radiation transfer from the auroral region to the near-equatorial region.

 auroral kilometric radiation radiation capture into the channel plasma inhomogeneities artificial Earth satellite space experiment upper hybrid resonance frequency auroral kilometric radiation radiation capture into the channel plasma inhomogeneities artificial Earth satellite space experiment upper hybrid resonance frequency The work of V.I. Kolpak and A.A. Chernyshov was financially supported by the Foundation for the Development of Theoretical Physics and Mathematics “BASIS” The work of V.I. Kolpak and A.A. Chernyshov was financially supported by the Foundation for the Development of Theoretical Physics and Mathematics “BASIS”

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