摘要
开展托卡马克等离子体中杂质输运与杂质控制研究对于提升等离子体约束性能与保障装置安全有重要意义。为了在EAST(Experimental Advanced Superconducting Tokamak)托卡马克装置上开展杂质输运研究,需要发展一套用于注入示踪杂质粒子的激光吹气(Laser Blow-off,LBO)微量杂质注入系统。本文描述了一种用于EAST托卡马克装置上LBO系统的控制系统设计过程与测试结果。该系统采用了全新的自动控制流程,使得系统可以重复、定量地向EAST等离子体注入不同元素的示踪杂质粒子。该设计通过STM32单片机系统实现对聚焦透镜位移、激光器被触发时刻的准确控制,且激光光斑直径可调,以改变杂质注入量。测试结果显示,系统能快速检测到外触发信号并实现精确定时,激光光斑聚焦位置误差小于0.40 mm,达到激光吹气杂质注入实验要求。本研究对在EAST装置上开展等离子体杂质输运研究具有重要意义。
[Background]Studying the transport behavior of impurities in plasma and developing effective impurity control methods are important for achieving high-performance plasma discharge and ensuring the safe operation of the device.[Purpose]This study aims to design a control system for the experimental advanced superconducting Tokamak(EAST)laser blow-off(LBO)impurity system.[Methods]A new automatic control process was adopted to enable to inject tracer particles of different elements into the EAST plasma repeatedly,quantitatively,and controllably.An accurate control of the focusing lens displacement and laser triggering time were achieved through the STM32 microcontroller system and its output PWM waves for stepper motor driving,hence the diameter of the laser spot was adjustable to change the amount of impurities injected.Finally,the designed control system for LBO was tested in staging environment to verify its practicability and accuracy.[Results]The test results show that the system can rapidly detect the external trigger signal and achieve precise timing,with less than 0.4 mm position error for laser spot focusing.[Conclusions]The design of control system meets the requirements of the laser blowing impurity injection experiment.This study is of considerable significance for research on EAST plasma impurity transport.
作者
范玉
赵宇红
张洪明
吕波
林子超
沈永才
尹相辉
王福地
符佳
计华健
曾超
毛立宇
孙波
FAN Yu;ZHAO Yuhong;ZHANG Hongming;LYU Bo;LIN Zichao;SHEN Yongcai;YIN Xianghui;WANG Fudi;FU Jia;JI Huajian;ZENG Chao;MAO Liyu;SUN Bo(School of Electrical Engineering,University of South China,Hengyang 421001,China;Institute of Plasma Physics,Hefei Institutes of Phyzical Science,Chinese Academy of Sciences,Hefei 230031,China;Science Island Branch Graduate School,University of Science and Technology of China,Hefei 230031,China;School of Physics and Materials Engineering,Hefei Normal University,Hefei 230601,China)
出处
《核技术》
CAS
CSCD
北大核心
2023年第12期55-64,共10页
Nuclear Techniques
基金
安徽省重点研究与开发计划项目(No.202104a06020021)
国家重点研发计划磁约束聚变能源研究专项(No.2019YFE03030002)
国家自然科学基金(No.12175278)
安徽省自然科学基金(No.1908085J01)
安徽高校协同创新项目(No.GXXT-2021-029)资助。
