Calculation of Neutral Beam Injected Torque and Its Effective Tangency Major Radius for EAST  

作　　者：伍兴权 万宝年 吕波 吴斌 王进芳 胡纯栋 

机构地区：[1]Institute of Plasma Physics,Chinese Academy of Sciences

出　　处：《Plasma Science and Technology》2015年第7期545-551,共7页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.11247302,11175211,11175208);the National Magnetic Confinement Fusion Science Program of China(Nos.2013GB101001 and 2013GB112004);International Science and Technology Cooperation Program of China(No.2014DFG61950)

摘　　要：Toroidal rotation has been recognized to have significant effects on the transport and magnetohydrodynarnic（MHD） stability of tokamak plasmas.Neutral beam injection（NBI） is the most effective rotation generation method on current,tokamak devices.To estimate the effective injected torque of the first neutral beam injection system on EAST,a simplified analytic method was derived.Calculated beam torque values were validated by those obtained from the NUBEAM code simulation.According to the results,for the collisional torque,the effective tangential radius for torque deposition is close to the beam tangency major radius.However,due to the dielectric property of tokamak plasma,the equivalent tangency major radius of the J×B torque is equal to the average major radius of the magnetic flux surface.The results will be useful for the research of toroidal momentum confinement and the experimental analysis of momentum transport related with NBI on EAST.Toroidal rotation has been recognized to have significant effects on the transport and magnetohydrodynarnic（MHD） stability of tokamak plasmas.Neutral beam injection（NBI） is the most effective rotation generation method on current,tokamak devices.To estimate the effective injected torque of the first neutral beam injection system on EAST,a simplified analytic method was derived.Calculated beam torque values were validated by those obtained from the NUBEAM code simulation.According to the results,for the collisional torque,the effective tangential radius for torque deposition is close to the beam tangency major radius.However,due to the dielectric property of tokamak plasma,the equivalent tangency major radius of the J×B torque is equal to the average major radius of the magnetic flux surface.The results will be useful for the research of toroidal momentum confinement and the experimental analysis of momentum transport related with NBI on EAST.

关 键 词：neutral beam injection TORQUE tangency major radius NUBEAM 

分 类 号：TL631.24[核科学技术—核技术及应用]