典型文献
Observation and Simulation of n=1 Reversed Shear Alfvén Eigenmode on the HL-2 A Tokamak
文献摘要：
A branch of high-frequency Alfvénic modes is observed on the HL-2A tokamak.The electromagnetic mode can be driven unstably in the plasma with an off-axis neutral beam heating.Its mode frequency keeps almost unchanged or presents a slow-sweeping behavior,depending on the detail current evolution.The poloidal and toroidal mode numbers are m/n=1/1.The mode has a quite short duration(≤20ms)and usually appears 5-10 ms after the neutral beam being injected into the plasma.Hybrid simulations based on M3D-K have also been carried out.The result suggests that co-passing energetic particles are responsible for the mode excitation.The simulated mode structures are localized nearby location of minimum safety factor(qmin)and agree with the structures obtained through tomography of soft x-ray arrays.Further,the modes are localized in the continuum gap and their frequencies increase with variation of qmin in a wide range.Last but not least,the characteristic of unchanged frequency on experiment is also reproduced by the nonlinear simulation with a fixed safety factor.All those evidences indicate that the n=1 high-frequency mode may belong to a reversed shear Alfvén eigenmode.
文献关键词：
中图分类号：
作者姓名：
P.W.Shi;Y.R.Yang;W.Chen;Z.B.Shi;Z.C.Yang;L.M.Yu;T.B.Wang;X.X.He;X.Q.Ji;W.L.Zhong;M.Xu;X.R.Duan
作者机构：
Southwestern Institute of Physics,Chengdu 610041,China;State Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Northwest Institute of Nuclear Technology,Xi'an 710024,China
文献出处：
引用格式：
[1]P.W.Shi;Y.R.Yang;W.Chen;Z.B.Shi;Z.C.Yang;L.M.Yu;T.B.Wang;X.X.He;X.Q.Ji;W.L.Zhong;M.Xu;X.R.Duan-.Observation and Simulation of n=1 Reversed Shear Alfvén Eigenmode on the HL-2 A Tokamak)[J].中国物理快报（英文版）,2022(10):26-33
A类：
Eigenmode,unstably,qmin
B类：
Observation,Simulation,Reversed,Shear,Alfv,HL,Tokamak,branch,high,frequency,nic,modes,observed,2A,tokamak,electromagnetic,can,driven,plasma,off,axis,neutral,beam,heating,Its,keeps,almost,unchanged,presents,slow,sweeping,behavior,depending,detail,current,evolution,poloidal,toroidal,numbers,are,has,quite,short,duration,20ms,usually,appears,after,being,injected,into,Hybrid,simulations,M3D,have,also,been,carried,out,result,suggests,that,passing,energetic,particles,responsible,excitation,simulated,structures,localized,nearby,location,minimum,safety,agree,obtained,through,tomography,soft,arrays,Further,continuum,gap,their,frequencies,increase,variation,wide,range,Last,but,not,least,characteristic,experiment,reproduced,nonlinear,fixed,All,those,evidences,indicate,may,belong,reversed,shear,eigenmode
AB值：
0.642503
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