Stochastic Acceleration of Electrons by the Right-Hand Extraordinary Mode in the High Density Plasma Region
XIAO Fu-Liang1, ZHENG Hui-Nan2, WANG Shui2
1Department of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha 410076
2School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026
Stochastic Acceleration of Electrons by the Right-Hand Extraordinary Mode in the High Density Plasma Region
XIAO Fu-Liang1;ZHENG Hui-Nan2;WANG Shui2
1Department of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha 410076
2School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026
Abstract： The resonant acceleration of electrons by the superluminous R-X mode is evaluated in the high density plasma region of Earth, specifically around the geostationary orbit. The corresponding resonant frequency range together with the harmonic N required for producing a significant acceleration is studied in detail. It is found that the stochastic acceleration is basically controlled by the harmonic N and a dimensionless parameter α=|Ωe2|/ωpe2 (where |Ωe| and ωpe are the electron gyrofrequency and plasma frequency respectively). For α= 0.1 (around the geostationary orbit), there are not gyroresonances occurring between electrons and right-hand extraordinary-mode electromagnetic waves until higher harmonics N ≥ 4; while for α= 0.5, the gyroresonance begins at N=2. Substantial acceleration of electrons by the right-hand extraordinary mode is possible for those higher harmonic (N>1) resonances over a wide range of wave normal angles θ. This indicates that higher harmonic resonance can play an important role on the electron acceleration in the high density plasma region (α<1).
XIAO Fu-Liang;ZHENG Hui-Nan;WANG Shui. Stochastic Acceleration of Electrons by the Right-Hand Extraordinary Mode in the High Density Plasma Region[J]. 中国物理快报, 2005, 22(6): 1552-1555.
XIAO Fu-Liang, ZHENG Hui-Nan, WANG Shui. Stochastic Acceleration of Electrons by the Right-Hand Extraordinary Mode in the High Density Plasma Region. Chin. Phys. Lett., 2005, 22(6): 1552-1555.
2005, Vol. 22 
