Chin. Phys. Lett.  2006, Vol. 23 Issue (5): 1351-1354    DOI:
Original Articles |
Analysis of the Interaction between Low-Frequency Waves and Ions in the High-Altitude Cusp Region Observed by Satellite Cluster
DUAN Su-Ping1;LIU Zhen-Xing1;CAO Jin-Bin1;SHI Jian-Kui1;LU Li1;LI Zhong-Yuan2;Q. G. Zong3;H. Reme4;N. Cornilleau-Wehrlin5;A. Balogh6;M. Andre7
1Key Laboratory of Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100080 2School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026 3Center for Space Physics, Boston University, Boston, MA 02215, USA 4CESR/CNRS, 9 Avenue du Colonel Roche, B.P.4346,F-31028 Toulouse Cedex 4, France 5CETP, 10/12 Avenue de L’Europe, F-78140 Velizy, France 6Space and Atmospheric physics group, The Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2BZ, UK 7Swedish Institute of Space physics, Uppsala Division, Box 537, SE-751 21 Uppsala, Sweden
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DUAN Su-Ping, LIU Zhen-Xing, CAO Jin-Bin et al  2006 Chin. Phys. Lett. 23 1351-1354
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Abstract The energy transfer between ions (protons) and low frequency waves (LFWs) in the frequency range f1 from 0.3 to 10Hz is observed by Cluster crossing the high-altitude polar cusp. The energy transfer between low frequency waves and ions has two means. One is that the energy is transferred from low frequency waves to ions and ions energy increases. The other is that the energy is transferred from ions to low frequency waves and the ion energy decreases. Ion gyratory motion plays an important role in the energy transfer processes. The electromagnetic field of f1 LFWs can accelerate or decelerate protons along the direction of ambient magnetic field and warm or refrigerate protons in the parallel and perpendicular directions of ambient magnetic field. The peak values of proton number densities have the corresponding peak values of electromagnetic energy of low-frequency waves. This implies that the kinetic Alfven waves and solitary kinetic Alfven waves possibly exist in the high-altitude cusp region.
Keywords: 94.20.Rr      94.30.-d      94.30.Tz     
Published: 01 May 2006
PACS:  94.20.Rr  
  94.30.-d (Physics of the magnetosphere)  
  94.30.Tz (Electromagnetic wave propagation)  
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DUAN Su-Ping
LIU Zhen-Xing
CAO Jin-Bin
SHI Jian-Kui
LU Li
LI Zhong-Yuan
Q. G. Zong
H. Reme
N. Cornilleau-Wehrlin
A. Balogh
M. Andre
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