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Plasma perturbations HF‐induced in the topside ionosphere
Author(s) -
Zhang Xuemin,
Frolov Vladimir,
Zhou Chen,
Zhao Shufan,
Ruzhin Yury,
Shen Xuhui,
Zhima Zeren,
Liu Jing
Publication year - 2016
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
eISSN - 2169-9402
pISSN - 2169-9380
DOI - 10.1002/2016ja022484
Subject(s) - ionosphere , langmuir probe , electron density , electron temperature , plasma , ion , electric field , electron , instability , satellite , atomic physics , joule heating , f region , thermal , geophysics , atmospheric sciences , materials science , physics , computational physics , plasma diagnostics , meteorology , mechanics , quantum mechanics , astronomy , composite material
Abstract Three plasma perturbations induced by SURA HF (high‐frequency) heating have been selected and analyzed in detail with the DEMETER satellite observing data by instruments of Langmuir probe and ion analyzer. Some common features are revealed, such as (1) electron density and electron temperature both increased during the heating period; (2) both O + density and ion temperature also increased generally, while H + varied negatively with O + density; (3) the ions were accelerated in upward and northward directions, resulting from the thermal pressure gradient, which also caused the variations in ULF (ultralow‐frequency) electric field due to V ⇀ × B ⇀ effects; and (4) the simulation results verify the electron density and temperature enhancement at the topside ionosphere due to the ohmic heating process and thermal self‐focusing instability over the heating region, which is consistent with the observing phenomena by the DEMETER satellite.