HL-2A托卡马克比压阿尔芬本征模的实验观测与模拟研究  

Experimental observation and simulation study of beta-induced Alfvén eigenmodes in the HL-2A tokamak

作　　者：尹刚 包健 陈伟 YIN Gang;BAO Jian;CHEN Wei(Southwestern Institute of Physics,Chengdu 610041;Institute of Physics,Chinese Academy of Sciences,Beijing 100190)

机构地区：[1]核工业西南物理研究院,成都610041 [2]中国科学院北京物理所,北京100190

出　　处：《核聚变与等离子体物理》2024年第2期214-221,共8页Nuclear Fusion and Plasma Physics

基　　金：国家重点研发计划“面向聚变堆高性能等离子体中快粒子物理实验研究”(2019YFE03020000);自然科学基金“磁约束等离子体中高能量粒子物理”(12125502)。

摘　　要：基于HL-2A装置上比压诱导的阿尔芬本征模(BAE)的实验观测结果,应用本征值程序GAM-solver,对BAE进行了模拟研究。模拟结果表明,BAE的频率大约在50~70kHz范围,且频率随环向模数的增加而增加,这些模拟结果和实验观测一致。同时,应用GAM-solver对环向模数n=3的BAE的模频率进行了预测,研究了主要等离子体参数,比如离子比压(βi)、电子温度(T_(e))以及离子温度(T_(i))对BAE模频率的影响。结果表明,BAE模频率同βi的平方根成正比;T_(e)和T_(i)的增大都会使BAE连续谱的积累点频率增大,连续谱的结构和BAE模的结构几乎不随T_(e)和T_(i)发生变化,而模频率随T_(e)和T_(i)的升高而升高,且与BAE的积累点频率一致,T_(i)的变化对BAE频率影响更大。Based on the experimental observations of beta-induced Alfvén eigenmodes(BAE)in the HL-2A tokamak,the simulation study of BAE has been conducted using the eigenvalue program GAM-solver.The simulated results find that the frequency of BAE is in the range of about 50~70kHz,which increases with the increase of toroidal mode numbers(n).These simulation results are consistent with the experimental observations.Moreover,the mode frequency of BAE with n=3 has been predicted using GAM-solver,and the effects of the main parameters,such as ion-beta(βi),electron temperature(T_(e)),and ion temperature(T_(i)),on the mode frequency of BAE have been studied.The results show that the frequency of the BAE mode is proportional to the square root ofβi;the increase of T_(e)and T_(i)will increase the frequency of the accumulation point of the BAE continuum spectrum.The structures of the continuum spectrum and the BAE mode are insensitive to T_(e)and T_(i).The mode frequency increases with the increase of T_(e)and T_(i),which is consistent with the accumulation point frequency of BAE,and the frequency of BAE is more sensitive to T_(i).

关 键 词：比压阿尔芬本征模 GAM-solver程序 BAE积累点频率 连续谱 

分 类 号：TL612.4[核科学技术—核技术及应用]