Exciting and propagating characteristics of two coexisting kinetic geodesic acoustic modes in the edge of plasma
作者: D.F. KongA.D. LiuT. LanC.X. YuJ. ChengZ.Y. QiuH.L. ZhaoH.G. ShenL.W. YanJ.Q. DongM. XuK.J. ZhaoX.R. DuanY. LiuR. ChenS.B. ZhangX. SunJ.L. XieH. LiW.D. Liu
作者单位: 1Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
2Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China
3Southwestern Institute of Physics, PO Box 432, Chengdu, Sichuan 610041, People’s Republic of China
4Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027, People’s Republic of China
刊名: Nuclear Fusion, 2017, Vol.57 (4)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1741-4326/aa5c62
原始语种摘要: Coexisting dual kinetic geodesic acoustic modes (KGAMs) with similar characteristics have been observed with Langmuir probe arrays in the edge plasma of HL-2A tokamak with low density Ohmic discharge. The dual KGAMs are named a low-frequency GAM (LFGAM) and a high-frequency GAM (HFGAM), respectively. By changing the line averaged density from to , the study of n e and T e profiles indicate that collision damping rate plays a crucial role on exciting of dual KGAMs, especially for the higher frequency branch (HFGAM). With the application of modulating techniques, we provide direct proof that nonlinear interactions between GAMs and ambient turbulence (AT) show great difference at different radial positions. At the exciting position of GAM, the amplitude modulation of AT...
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  • geodesic 测地的
  • propagating 传递
  • acoustic 声的
  • modes 模式
  • kinetic 动的
  • modulation 
  • tokamak 托卡马克
  • shearing 剪断
  • exciting 激动人心的
  • proof 证明