GUO Jun(郭俊). The Effects of Relative Drift Velocities Between Proton and He2+ on the Magnetic Spectral Signatures in the Plasma Depletion Layer[J]. Plasma Science and Technology, 2011, 13(5): 557-560.
Citation:
GUO Jun(郭俊). The Effects of Relative Drift Velocities Between Proton and He2+ on the Magnetic Spectral Signatures in the Plasma Depletion Layer[J]. Plasma Science and Technology, 2011, 13(5): 557-560.
GUO Jun(郭俊). The Effects of Relative Drift Velocities Between Proton and He2+ on the Magnetic Spectral Signatures in the Plasma Depletion Layer[J]. Plasma Science and Technology, 2011, 13(5): 557-560.
Citation:
GUO Jun(郭俊). The Effects of Relative Drift Velocities Between Proton and He2+ on the Magnetic Spectral Signatures in the Plasma Depletion Layer[J]. Plasma Science and Technology, 2011, 13(5): 557-560.
1 College of Mathematics and Physics, Qingdao University of Science and Technology, Qingdao 266042, China 2 State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, China
Funds: Supported by the National Natural Science Foundation of China under Grant No. 40974097, the Specialized Research Fund for State Key Laboratories, China
Magnetic spectrum of the electromagnetic ion cyclotron waves in the terrestrial plasma depletion layer (PDL) are sometimes observed to have a BIF(bifurcated) signature, where a diminution around 0.5Ωp with Ωp the proton gyrofrequency, occurs between two activity peaks in the spectrum. By one-dimensional hybrid simulations, the effects of relative drift velocities between protons and He2+ on the magnetic spectral signatures in the PDL is studied. The results show that the relative drift velocity enhances the development of proton cyclotron waves and declines the development of helium cyclotron waves. The proton cyclotron waves are firstly excited, and followed by the excitation of helium cyclotron waves due to the increase in the relative drift velocity. Moreover, the boundary between two activity peaks gets obscure.
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