Флуктуации электрического и магнитного полей в плазменном слое хвоста магнитосферы земли по данным MMS

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Проведен статистический анализ спектров флуктуаций электрического и магнитного поля в плазменном слое хвоста магнитосферы Земли по данным спутников миссии Multiscale Magnetosphere Mission (MMS) за 2017–2022 гг. при небольших скоростях движения плазмы. Рассмотрены результаты измерений комплекса аппаратуры FIELDS. Выделены трехчасовые интервалы, во время которых спутники находились внутри плазменного слоя и плазменный параметр β был больше единицы. Проведен анализ более ста тысяч спектров флуктуаций электрического поля прибором EDP/DCE и магнитного поля прибором FGM. Из рассмотрения были исключены интервалы со скоростями плазмы свыше 100 км/с. Для каждого интервала определены показатели наклонов спектров в частотном диапазоне 0.014–16 Гц. Выявлено, что величины показателей спектров существенно отличаются для электрического и магнитного поля. Получены зависимости показателей спектров от усредненных по интервалу уровней флуктуаций электрического и магнитного полей.

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作者简介

И. Овчинников

Научно-исследовательский институт ядерной физики им. Д. В. Скобельцына Московского государственного университета имени М. В. Ломоносова

编辑信件的主要联系方式.
Email: ilya@psn.ru
俄罗斯联邦, Москва

Д. Найко

Научно-исследовательский институт ядерной физики им. Д. В. Скобельцына Московского государственного университета имени М. В. Ломоносова; Московский государственный университет имени М. В. Ломоносова

Email: ilya@psn.ru
俄罗斯联邦, Москва; Москва

Е. Антонова

Научно-исследовательский институт ядерной физики им. Д. В. Скобельцына Московского государственного университета имени М. В. Ломоносова; Институт космических исследований РАН

Email: ilya@psn.ru
俄罗斯联邦, Москва; Москва

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2. Fig. 1a. Parameters of the MMP and solar wind, geomagnetic activity for the interval 14.VI.2017 at 01:00-04:00 UT from OMNI one-minute data. The background indicates the analyzed time interval.

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3. Fig. 1b. Magnetic (Bx, By, Bz) and electric (Ex, Ey, Ez) field fluctuations in the interval 14.VI.2017 at 01:00-04:00 UT based on data from MMS-1.

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4. Fig. 2. Examples of fluctuation spectra of electric and magnetic field components at low fluctuation level (event 14.VI.2017 at 01:00-04:00 UT). On the horizontal axis - frequency, on the vertical axis - power spectral density.

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5. Fig. 3a. Parameters of MMP and solar wind and geomagnetic activity for the interval 15.VII.2018 at 11:00-14:00 based on OMNI one-minute data. The background indicates the analyzed time interval.

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6. Fig. 3b. Magnetic (Bx, By, Bz) and electric (Ex, Ey, Ez) field fluctuations in the interval 15.VII.2018 at 11:00-14:00 based on data from MMS-1.

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7. Fig. 4. Examples of the fluctuation spectra of electric and magnetic field components at the increased fluctuation level under quiet geomagnetic conditions (event 15.VII.2018 at 11:00-14:00).

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8. Fig. 5. Two-dimensional histograms of dependence of spectral indices of the x-component of the electric field on the level of electric field component fluctuations. The number of cases is shown in color.

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9. Fig. 6. Two-dimensional histograms of dependence of spectral indices of the x-component of the magnetic field on the level of fluctuations of the magnetic field components. The number of cases is shown in color.

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10. Fig. 1, P1. Two-dimensional histograms of dependence of spectral indices of the x-component of the electric field on the level of electric field component fluctuations. The number of cases is shown in color.

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11. Fig. 2, P1. Two-dimensional histograms of dependence of spectral indices of the y-component of the electric field on the level of electric field component fluctuations. The number of cases is shown in color.

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12. Fig. 3, P1. Two-dimensional histograms of dependence of spectral indices of the z-component of the electric field on the level of electric field component fluctuations. The number of cases is shown in color.

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13. Fig. 4, P1. Two-dimensional histograms of dependence of the spectral indices of the x-component of the electric field on the level of fluctuations of the magnetic field components. The number of cases is shown in color.

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14. Fig. 5, P1. Two-dimensional histograms of dependence of the spectral indices of the y-component of the electric field on the level of fluctuations of the magnetic field components. The number of cases is shown in color.

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15. Fig. 6, P1. Two-dimensional histograms of the dependence of the spectral indices of the z-component of the electric field on the level of fluctuations of the magnetic field components. The number of cases is shown in color.

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16. Fig. 7, P1. Two-dimensional histograms of dependence of the spectral indices of the x-component of the magnetic field on the level of fluctuations of the electric field components. The number of cases is shown in color.

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17. Fig. 8, P1. Two-dimensional histograms of dependence of the spectral indices of the y-component of the magnetic field on the level of fluctuations of the electric field components. The number of cases is shown in color.

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18. Fig. 9, P1. Two-dimensional histograms of dependence of the spectral indices of the z-component of the magnetic field on the level of fluctuations of the electric field components. The number of cases is shown in color.

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19. Fig. 10, P1. Two-dimensional histograms of dependence of the spectral indices of the x-component of the magnetic field on the level of fluctuations of the magnetic field components. The number of cases is shown in color.

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20. Fig. 11, P1. Two-dimensional histograms of dependence of the spectral indices of the y-component of the magnetic field on the level of fluctuations of the magnetic field components. The number of cases is shown in color.

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21. Fig. 12, P1. Two-dimensional histograms of the dependence of the spectral indices of the z-component of the magnetic field on the level of fluctuations of the magnetic field components. The number of cases is shown in color.

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