2019年10月11日 五室第118期研讨会

2019年10月11 五室第118期研讨会 

题 目:Numerical study of m/n=3/1 pressure driven mode in the presence of weak magnetic shear

报告人:马骏

主持人:于治

   间: 2019年10月11日(星期五)  15:00—16:00

   点: 6楼中间会议室

  要:

An m/n=3/1 unstable mode can be driven by pressure in the presence of a reversed shear in a cylinder, in which the magnetic shear is small near rational surfaces since qmin = 2.99. The linear mode can be considered as an ideal mode since the resistivity has very little effects upon the mode structure and growth rate for eta <= 10^-7. In nonlinear stage, after long time evolution the mode behaves as a tearing type mode, with final quasi-stationary m/n=3/1 islands. The pressure profile also reaches a new 0/0 state, which is flattened in the vicinity of weak shear region.

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