Simulation of ion cyclotron wave heating in the EXL-50U spherical tokamak based on dispersion relations  

作　　者：马好杰 谢华生 李博 Haojie MA;Huasheng XIE;Bo LI(School of Physics,Beihang University,Beijing 100191,People's Republic of China;Hebei Key Laboratory of Compact Fusion,Langfang 065001,People's Republic of China;ENN Science and Technology Development Co.Ltd.,Langfang 065001,People's Republic of China)

机构地区：[1]School of Physics,Beihang University,Beijing 100191,People's Republic of China [2]Hebei Key Laboratory of Compact Fusion,Langfang 065001,People's Republic of China [3]ENN Science and Technology Development Co.Ltd.,Langfang 065001,People's Republic of China

出　　处：《Plasma Science and Technology》2024年第2期54-61,共8页等离子体科学和技术（英文版）

基　　金：supported by the National Magnetic Confinement Fusion Energy Program of China (No.2018 YFE0311300);the High-End Talents Program of Hebei Province, Innovative Approaches Towards Development of Carbon-Free Clean Fusion Energy (No.2021HBQZYCSB 006);the Compact Fusion Project of the ENN Group。

摘　　要：This study investigates the single-pass absorption(SPA) of ion cyclotron range of frequency(ICRF) heating in hydrogen plasma of the EXL-50U spherical tokamak,which is an upgraded EXL-50 device with a central solenoid and a stronger magnetic field.The reliability of the kinetic dispersion equation is confirmed by the one-dimensional full-wave code,and the applicability of Porkolab's simplified theoretical SPA model is discussed based on the kinetic dispersion equation.Simulations are conducted to investigate the heating effects of the fundamental and second harmonic frequencies.The results indicate that with the design parameters of the EXL-50U device,the SPA for second harmonic heating is 63%,while the SPA for fundamental heating is 13%.Additionally,the optimal injection frequencies are 23 MHz at 0.9 T and 31 MHz at 1.2 T.The wave vector of the antenna parallel to the magnetic field,with a value of k_‖=7.5 m^(-1),falls within the optimal heating region.Simulations reveal that the ICRF heating system can play an important role in the ion heating of the EXL-50U.

关 键 词：ion cyclotron range of frequency single-pass absorption spherical tokamak 

分 类 号：TL631.24[核科学技术—核技术及应用]