Physical Process for the Pick-Up of Minor Ions by Low-Frequency Alfvén Waves
WANG Chuan-Bing1** , WEI Jing-Dong1 , WANG Bin2 , WANG Shui1
1 CAS Key Lab of Geospace Environment, Department of Geophysics and Planetary Science, University of Science and Technology of China, Hefei 2300262 Beijing Institute of Tracing and Telecommunications Technology of China, Beijing 100094
Abstract ：We study the physical process for the pick-up of minor ions by obliquely propagating low-frequency Alfvén waves. It is demonstrated that minor ions can be picked up by the intrinsic low-frequency Alfvén waves observed in the solar wind. When the wave amplitude exceeds the threshold condition for stochasticity, a minor ion can gain a high magnetic moment through the stochastic heating process. Then, the ion with a large magnetic moment can be trapped in the magnetic mirror-like field structures formed by the large-amplitude low-frequency Alfvén waves in the wave frame. As a result, the ion is picked up by the Alfvén waves.
收稿日期: 2013-01-05
出版日期: 2013-05-31
:
52.35.-g
(Waves, oscillations, and instabilities in plasmas and intense beams)
96.50.-e
(Interplanetary physics)
96.50.Ci
(Solar wind plasma; sources of solar wind)
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2013, Vol. 30 
