Home About Us Research People Visitors International Cooperation News Education & Training Join Us Papers Resources Links Societies & Publications
Pic News
Int’l Cooperation News
Forums & Lectute
Location: Home > News > Events
Nonlinear decay and plasma heating by toroidal Alfven eigenmode
Date: 2018-04-18
Time: 09:00
Venue: 中国科学院物理研究所M楼253会议室
Speaker: 仇志勇博士

IFTS,Zhejiang University

Nonlinear decay of toroidal Alfven eigenmode (TAE) into a geodesic acoustic mode (GAM) and a lower kinetic TAE (LKTAE) with the same toroidal/popoidal mode number is investigated due to its crucial implications on TAE nonlinear saturation, improved confinement, as well as energetic particle (EP) power channeling, including fusion-alpha power density to bulk thermal plasma heating. The parametric dispersion relation is derived and analyzed, and the parameter range for this process to occur and dominate over other mechanisms is discussed. The nonlinearly generated LKTAE and GAM can be dissipated via electron and ion Landau damping, respectively, leading to anomalous EP slowing down and channeling of EP power to thermal ion heating. The thermal plasma heating rates are also estimated. Furthermore, the nonlinearly generated GAM, as the finite frequency zonal flow, could contribute to regulating drift wave turbulence and consequently, improved confinement.


The Institute of Physics, Chinese Academy of Sciences P.O.Box 603,Beijing 100190,China
Tel:86-10-82649361 Fax:86-10-82649531 email: zhoumb@aphy.iphy.ac.cn
© Copyright The Institute of Physics