EAST装置电子回旋辐射二维成像系统的屏蔽优化  

Eletromagnetic shielding optimization of ECE imaging diagnostic on EAST tokamak

作　　者：仝丽[1] 赵朕领 陈东旭[1] 朱逸伦[1] 韩东起[1] 谢锦林[1] 

机构地区：[1]中国科学技术大学近代物理系,合肥230026

出　　处：《核聚变与等离子体物理》2016年第3期224-230,共7页Nuclear Fusion and Plasma Physics

基　　金：国家磁约束核聚变能发展研究专项(2013GB106002;2014GB109002);国家自然科学基金(11275200)

摘　　要：介绍了EAST装置上的384道(极向24道径向16道)的外差混频式电子回旋辐射成像诊断系统及其在EAST及其复杂的电磁环境中的运行情况。在低杂波电流驱动期间,高灵敏度的电子回旋辐射成像系统受到严重干扰以至于无法提供正确的实验数据。通过优化系统各模块的接地、外加多层铜网屏蔽等措施,使得ECEI系统屏蔽效能与改善之前相比提高了40d B,基本保障了EAST装置上电子回旋辐射成像诊断的正常工作。Electron cyclotron emission imaging （ECEI） diagnostic system with 384 channels was installed on EAST tokamak. Since EAST was equipped with 4MW ICRF system, 4MW LHCD system and NBI system, the ECEI diagnostic system on EAST was heavily interfered, especially by the lower hybrid wave. The optimization of the electromagnetic shielding is presented, which help to reduce the interference to 40dB. Appropriate copper mesh shield and the correct ground connection are the key solutions. The comparisons of the ECEI raw signals before and after the optimization clearly show that the shielding performance is greatly improved.

关 键 词：电子回旋辐射成像 低杂电流驱动 电磁屏蔽 

分 类 号：O536[理学—等离子体物理]