分段式电子回旋波驱动电流对早期新经典撕裂模的抑制  

Suppression neoclassical tearing mode instability at the initial stage by segmented electron cyclotron current drive

作　　者：杨振 吴斌[1] 陈玉庆 YANG Zhen;WU Bin;CHEN Yu-qing(Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031;University of Science and Technology of China,Hefei 230031)

机构地区：[1]中国科学院等离子体物理研究所,合肥230031 [2]中国科学技术大学,合肥230031

出　　处：《核聚变与等离子体物理》2023年第2期238-242,共5页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金(11875290,11705229,11805231,11905142);中国科学院合肥大科学中心协同创新培育基金(2019HSC-CIP015,2020HSCCIP016)。

摘　　要：新经典撕裂模的产生会严重影响托卡马克装置的约束性能,而且在高参数运行状态下的所有装置中该不稳定性不可避免。新经典撕裂模的抑制工作对于聚变装置至关重要,电子回旋波驱动电流(ECCD)是目前抑制新经典撕裂模的主要手段之一。用数值模拟的方法研究了在新经典撕裂模发展的早期加入ECCD后,对新经典撕裂模发展的影响。通过数值模拟发现较小份额的连续ECCD可以减小新经典撕裂模早期的增长速度,同时可以提高再次加入电子回旋波驱动电流抑制处于增长期的新经典撕裂模的效率。Neoclassical tearing mode(NTM) instability will seriously affect the confinement performance of tokamak,which is an unavoidable MHD instability in all major tokamak devices.How to suppress the NTM instability has become one of the key issues of fusion research.It has been found that electron cyclotron wave current drive(ECCD) is one of the main methods to suppress NTM instability.Using the numerical simulation,the influence of the continuous ECCD on the development of neoclassical tear mode was studied by adding ECCD in the early stage of neoclassical tearing mode.The numerical results represent that a small ratio of continuous ECCD can reduce the growth rate of neoclassical tearing mode at early stage and improve the efficiency of later ECCD to suppress neoclassical tearing mode in the growth stage.

关 键 词：新经典撕裂模 电子回旋波驱动电流 早期抑制 

分 类 号：TL612[核科学技术—核技术及应用] O534.2[理学—等离子体物理]