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Enhancements in relativistic electron fluxes in auroral regions according to the data of the DEPRON instrumentтезисы доклада
- Авторы: Zolotarev I.A., Benghin V.V., Yushkov B.Yu, Antonyuk G.I., Yashin I.V., Nechaev O.Yu
- Сборник: PHYSICS OF AURORAL PHENOMENA 46th Annual Seminar Abstracts
- Тезисы
- Год издания: 2023
- Место издания: Polar Geophysical Institute, Apatity
- Первая страница: 25
- Последняя страница: 25
- Аннотация: Enhancements in particle fluxes have been studied on polar satellites since the early 1970s and continue to attract the interest of researchers [1]. Studies show the presence of various types of enhancements in high-resolution POES data, which can be associated with different origins of these phenomena [2]. To study the phenomena of increasing particle fluxes and dose rates based on the results of the DEPRON dosimeter, a catalog of graphic materials was created. The catalog contains graphs of the dose and fluxes of charged particles at each orbit intersection of the outer radiation belt (EP) for half a year of operation of the device. We analyzed the catalog for January 1-9, 2017 and selected graphs containing enhancements. Of the 523 ORB crossings, 25% contain enhancements. After analyzing the catalog, an algorithm was created to automatically find dose enhancements with a duration of up to 20 s. The results of the algorithm were compared with the selection of an expert. The algorithm successfully determines the position of 77% of the enhancements. Using the algorithm, a search for enhancements over the entire period of operation of the DEPRON device was carried out. Enhancements in charged particle fluxes and doses are observed at 16% of orbit ORB crossings (25% in January 2017). The contribution of enhancements at the intersection of ORB was 15%, and in the dose of whole ORB for January 2017 - 2.5%. Most of the dose enhancements are at the outer edge of the ORB, L~6. The enhancements frequency increases as the solar wind speed increases. The enhancements do not pose a serious radiation hazard to the spacecraft crew; their contribution is about 1% to the daily dose for the entire time of instrument operation. In a quiet geomagnetic environment AE < 500, periods are observed when bursts are absent for several turns in a row. Intense enhancements > 7 μGy/s are observed at elevated AE index. The number of enhancements in the northern hemisphere and in the southern is almost the same, while on the night side the number of enhancements is an order of magnitude greater.
- Добавил в систему: Антонюк Георгий Игоревич