Determination of particle sources for a geotail distribution function observed on may 23, 1995 : научное издание

Ashour-Abdalla M.; El-Alaoui M.; Peroomian V.; Raeder J.; Richard R.L.; Walker R.J.; Zelenyi L.M.; Frank L.A.; Paterson W.R.; Bosqued J.M.; Lepping R.P.; Ogilvie K.; Kokubun S.; Yamamoto T.

Дополнительные ссылки: РИНЦ

База данных: Каталог библиотеки СФУ

Библиографическое описание: Determination of particle sources for a geotail distribution function observed on may 23, 1995 : научное издание / M. Ashour-Abdalla [et al.]. - Текст : непосредственный // Geophysical Monograph Series. - 1998. - Т. 104, № . - P. 297-312. - ISSN 0065-8448, DOI 10.1029/GM104p0297.

Аннотация: On May 23, 1995, the Comprehensive Plasma Instrumentation (CPI) onboard the Geotail spacecraft observed a complex and structured ion distribution function near the magnetotail midplane atX ~ -10 RE. On the same day, the Wind spacecraft observed a very high density (~ 40 cm-3) solar wind and an interplanetary magnetic field (IMF) that was predominantly northward but had several southward turnings. We have inferred the sources of the ions in this distribution function by following approximately 90,000 ion trajectories backward in time using time-dependent electric and magnetic fields obtained from a global MHD simulation. Wind data were used as input for the MHD model. We found that three sources contributed to this distribution: the ionosphere, the plasma mantle which had near-Earth and distant tail components, and the low latitude boundary layer (LLBL). Moreover, distinct structures in the low energy part of the distribution function were found to be associated with individual sources. Structures near 0° pitch angle were made up of either ionospheric or plasma mantle ions, while structures near 90° pitch angle were dominated by ions from the LLBL source. Particles that underwent nonadiabatic acceleration were numerous in the higher energy part of the ion distribution function, whereas ionospheric and LLBL ions were mosdy adiabatic. A large proportion of the near-Earth mantle ions underwent adiabatic acceleration, while most of the distant mantle ions experienced nonadiabatic acceleration.

Год издания: 1998

Авторы: Ashour-Abdalla M. , El-Alaoui M. , Peroomian V. , Raeder J. , Richard R.L. , Walker R.J. , Zelenyi L.M. , Frank L.A. , Paterson W.R. , Bosqued J.M. , Lepping R.P. , Ogilvie K. , Kokubun S. , Yamamoto T.

Источник: Geophysical Monograph Series

Выпуск: Т. 104

Номера страниц: 297-312

Держатель оригинала документа: Centre d’Eitude Spatiale des Rayonnements,CNRS, Department of Physics and Astronomy,The University of Iowa, Institute of Geophysics and Planetary Physics,University of California, ISAS, NASA,Goddard Space Flight Center, Space Research Institute,Russian Academy of Sciences, STELAB,Nagoya University

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