The simulation of L-H transition in tokamak plasma using MMM95 transport model

International Nuclear Science and Technology Conference 2014

Intharat, P.^1 ; Chatthong, B.^2 ; Onjun, T.^2 ; Poolyarat, N.^1 ; Picha, R.^3

Department of Physics, Faculty of Science and Technology, Thammasat University, Pathum Thani, Thailand^1

School of Manufacturing Systems and Mechanical Engineering, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani, Thailand^2

Thailand Institute of Nuclear Technology, Bangkok, Thailand^3

关键词: Anomalous transport;    Auxiliary heating;    Confinement modes;    Predictive modelling;    Radial electric field;    Transport analysis;    Transport modeling;    Turbulent transports;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/611/1/012005/pdf
DOI  :  10.1088/1742-6596/611/1/012005

来源: IOP

【 摘 要 】

BALDUR integrative predictive modelling code together with a Multimode (MMM95) anomalous transport model is used to simulate the evolution profiles, including plasma current, temperature, density and energy in a tokamak reactor. It is found that a self - transition from low confinement mode (L-mode) to high confinement mode (H-mode) regimes can be achieved once a sufficient auxiliary heating applied to the plasma is reached. The result agrees with experimental observations from various tokamaks. A strong reduction of turbulent transport near the edge of plasma is also observed, which is related to the formation of steep radial electric field near the edge regime. From transport analysis, it appears that the resistive ballooning mode is the dominant term near the plasma edge regime, which is significantly reduced during the transition.