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李罗权院士报告
2017-04-03
聚变理论与模拟中心英文网
Title about: Generation of helium and oxygen EMIC waves by the bunch distribution of oxygen ions associated with fast magnetosonic shocks in the magnetosphere Speaker: 李罗权院士,Institute of Earth Science, Academia Sinica, Nankang, Taiwan Time: Thursday, April 6th, 3:30pmVenue: Rm. 413, Bld. 11#, Yuquan CampusAbstract: Electromagnetic ion cyclotron (EMIC) waves are often observed in the magnetosphere with frequency usually in the proton and helium cyclotron bands and sometimes in the oxygen band. The temperature anisotropy, caused by injection of energetic ions or by compression of magnetosphere, can efficiently generate proton EMIC waves, but not as efficient for helium or oxygen EMIC waves. Here we propose a new generation mechanism for helium and oxygen EMIC waves associated with fast magnetosonic shocks, which are observed in the magnetosphere. These shocks can be associated with either dynamic pressure enhancement or shocks in the solar wind and can lead to the formation of a “bunch” distribution in the perpendicular velocity plane of oxygen ions. The oxygen bunch distribution can excite strong helium EMIC waves and weak oxygen and proton waves. The dominant helium EMIC waves are strong in quasi-perpendicular propagation and show harmonics in frequency spectrum of Fourier analysis. The proposed mechanism can explain the generation and some observed properties of helium and oxygen EMIC waves in the magnetosphere.
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Six Lectures on Gyrokinetic Theory by Prof. Alain Brizard
2017-04-03
聚变理论与模拟中心英文网
Title: Six Lectures on Gyrokinetic TheorySpeaker: Prof. Alain J. Brizard, Saint Michael’s College (USA)Time: April 10, April 12, April 14, April 17, April 19, April 21, 2017, 9:00-11:00 AMVenue: Rm. 413-1, Bld. 11#, Yuquan CampusYou are warmly welcomed to take part in it.
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Physics of Alfvén waves and energetic particles in fusion plasmas--Linear physics and stability in tokamaks by Prof. Fulvio Zonca
2017-04-03
聚变理论与模拟中心英文网
Title: Physics of Alfvén waves and energetic particles in fusion plasmas--Linear physics and stability in tokamaksSpeaker: Prof. Fulvio ZoncaTime and Location: Lectures (9am-11am) and Q&A Sessions (3pm-5pm) will be held at IFTS on April 27-29 and May 4-6-8-10Venue: Rm. 413-1, Bld. 11#, Yuquan CampusYou are warmly welcomed to take part in it.
