Influence Of Local Heat Source On Thermal Transport Of Magnetic Island And Its Effect On The Instability Of The Tearing Mode

The study of the thermal transport in Tokamak plasma is one of the important contents of the anomalous heat transport,and the ratio w/w_c of the critical magnetic island width and the magnetic island width is an important parameter in the study of thermal transport.As the parallel heat transport in the magnetic island to produce additional transport effect will enhance the radial heat transport,the maximum value is reached at the rational surface.when w/w_c<1,x_r/x_⊥ is proportional to (w/w_c)~4 ,then w/w_c>3,x_r/x_⊥ is also proportional to (w/w_c)~2 ,there is a transition between the two region,this change is slowed down.As the electron cyclotron resonance heating(ECRH)has a good local.In this paper,the numerical methods is used to simulate ECRH heating with the local Gaussian heat source in the magnetic island.While there is a background heat source with the local Gaussian heat source,it is found that adding a local Gaussian heat source in a single magnetic island can effectively increase the temperature difference between the magnetic island point and the magnetic island point,and reduce the adverse effect of a single magnetic island on the plasma energy constraint.The stochastic field is generated by the overlap of two magnetic islands.Contrast with the two care in random magnetic field with or without local Gaussian heat source.It is found that adding local Gaussian heat source in the random magnetic field can greatly increase the temperature disturbance between the magnetic island point and the magnetic island point and suppress the unfavorable influence of the random magnetic field on the energy constraint of the plasma.