Anomalous Convection Reversal due to Turbulence Transition in Tokamak Plasmas  

作　　者：孙恬恬 陈少永 王占辉 彭晓东 黄捷 牟茂淋 唐昌建 

机构地区：[1]College of Physical Science and Technology, Sichuan University, Chengdu 610064 [2]Southwestern Institute of Physics, Chengdu 610041

出　　处：《Chinese Physics Letters》2015年第3期70-73,共4页中国物理快报（英文版）

基　　金：Supported by the National Magnetic Confinement Fusion Science Program of China under Grant Nos 2013GB107002 and2014GB108002;the National Natural Science Foundation of China under Grant No 11205053

摘　　要：A critical physical model, based on the ion temperature gradient （ITG） mode and the trapped electron mode （TEM）, trying to explain the spatio-temporal dynamics of anomalous particle convection reversal （i.e., the particle convective flux reverses from inward to outward）, is developed numerically. The dependence of density peaking and profile shape on the particle convection is studied. Only the inward pinch could lead to the increase of the density peaking. The validation of the critical model is also analyzed. A comparison of the estimates calculated by the model and the experimental results from the Tore Supra tokamak shows that they are qualitatively both consistent.A critical physical model, based on the ion temperature gradient （ITG） mode and the trapped electron mode （TEM）, trying to explain the spatio-temporal dynamics of anomalous particle convection reversal （i.e., the particle convective flux reverses from inward to outward）, is developed numerically. The dependence of density peaking and profile shape on the particle convection is studied. Only the inward pinch could lead to the increase of the density peaking. The validation of the critical model is also analyzed. A comparison of the estimates calculated by the model and the experimental results from the Tore Supra tokamak shows that they are qualitatively both consistent.

关 键 词：TEM ITG 

分 类 号：TL631.24[核科学技术—核技术及应用] TK124[动力工程及工程热物理—工程热物理]