Numerical linear analysis of the effects of diamagnetic and shear flow on ballooning modes  

作　　者：黄艳清 夏天阳 桂彬 

机构地区：[1]Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China [2]University of Science and Technology of China, Hefei 230031, People's Republic of China

出　　处：《Plasma Science and Technology》2018年第4期93-106,共14页等离子体科学和技术（英文版）

基　　金：supported by program of Fusion Reactor Physics and Digital Tokamak with the CAS ‘OneThree-Five’ Strategic Planning;the JSPS-NRF-NSFC A3 Foresight Program in the field of Plasma Physics (NSFC: No. 11261140328 and NRF: No. z012K2A2A6000443);supported by National Natural Science Foundation of China under Contract Nos. 11405215, 11505236 and 11675217;the National Magnetic Confinement Fusion Science Program of China under Contract Nos. 2015GB101003, 2014GB106001 and 2013GB111002

摘　　要：The linear analysis of the influence of diamagnetic effect and toroidal rotation at the edge of tokamak plasmas with BOUT++ is discussed in this paper. This analysis is done by solving the dispersion relation, which is calculated through the numerical integration of the terms with different physics. This method is able to reveal the contributions of the different terms to the total growth rate. The diamagnetic effect stabilizes the ideal ballooning modes through inhibiting the contribution of curvature. The toroidal rotation effect is also able to suppress the curvaturedriving term, and the stronger shearing rate leads to a stronger stabilization effect. In addition,through linear analysis using the energy form, the curvature-driving term provides the free energy absorbed by the line-bending term, diamagnetic term and convective term.The linear analysis of the influence of diamagnetic effect and toroidal rotation at the edge of tokamak plasmas with BOUT++ is discussed in this paper. This analysis is done by solving the dispersion relation, which is calculated through the numerical integration of the terms with different physics. This method is able to reveal the contributions of the different terms to the total growth rate. The diamagnetic effect stabilizes the ideal ballooning modes through inhibiting the contribution of curvature. The toroidal rotation effect is also able to suppress the curvaturedriving term, and the stronger shearing rate leads to a stronger stabilization effect. In addition,through linear analysis using the energy form, the curvature-driving term provides the free energy absorbed by the line-bending term, diamagnetic term and convective term.

关 键 词：ideal ballooning modes numerical simulations ion diamagnetic effect shear flow 

分 类 号：TL631.24[核科学技术—核技术及应用]