| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Anomalous Convection Reversal due to Turbulence Transition in Tokamak Plasmas |
| SUN Tian-Tian1, CHEN Shao-Yong1,2**, WANG Zhan-Hui2, PENG Xiao-Dong2, HUANG Jie1, MOU Mao-Lin1, TANG Chang-Jian1 |
1College of Physical Science and Technology, Sichuan University, Chengdu 610064
2Southwestern Institute of Physics, Chengdu 610041
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| Cite this article: |
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SUN Tian-Tian, CHEN Shao-Yong, WANG Zhan-Hui et al 2015 Chin. Phys. Lett. 32 035201 |
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Abstract 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.
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Published: 26 February 2015
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