Evolutions of limit cycle oscillation in L-I-H transitions on HL-2A
作者: J. ChengJ.Q. DongL.W. YanY. XuZ.H. HuangK.J. ZhaoX.Q. JiW.L. ZhongD.L. YuL. NieX.M. SongQ.W. YangX.T. Ding
作者单位: 1Southwestern Institute of Physics, P.O. Box 432, Chengdu, Sichuan 610041, China
2Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027, China
3WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333, Republic of Korea
4Department of Modern Physics, USTC, Hefei 230026, China
刊名: Journal of Nuclear Materials, 2015, Vol.463 , pp.455-458
来源数据库: Elsevier Journal
DOI: 10.1016/j.jnucmat.2014.12.068
英文摘要: Abstract(#br)Poloidal symmetric low frequency oscillations at the plasma edge were observed during the low-intermediate-high transitions on the HL-2A tokamak. The limit cycle oscillation (LCO) frequency gradually reduces from 3.0kHz to 1.5kHz approaching the H mode. Meanwhile a transition of phase shift between the turbulence and the radial electric field was identified. In the initial phase, the turbulence grows first, followed by the localized electric field. In the later phase, the electric field leads turbulence, and the magnitude of the Reynolds stress gradient is out of phase with the LCO flow. The increasing magnitudes of the magnetic fluctuation may be correlated with the I-H transition. In addition, the divertor heat flux is also...
全文获取路径: Elsevier  (合作)
影响因子:1.211 (2012)

  • oscillation 振荡
  • limit 界限
  • cycle 旋回