低杂波PAM阵列天线的耦合分析与实验研究

项目名称： 低杂波PAM阵列天线的耦合分析与实验研究

项目编号： No.11205195

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学II

项目作者： 贾华

作者单位： 中国科学院合肥物质科学研究院

项目金额： 30万元

中文摘要： 低杂波是托卡马克等离子体实验中非常有效的非感应电流驱动手段之一。随着EAST辅助加热功率的提高和稳态运行，常用的有源多结波导天线需要与高温等离子体保持较远距离，以避免天线端口被烧坏，但此时会导致天线口密度较低而耦合变差，降低电流驱动效率。PAM类型的低杂波天线在密度较低时也能达到较好的耦合，是EAST装置未来的理想选择。本项目拟通过建立天线与等离子体的三维耦合模型，研究PAM波导阵列天线在不同等离子体密度模型下的耦合，探索提高PAM天线电流驱动效率的方法；考虑等离子体负载，研究PAM天线的综合优化设计方法；结合EAST装置物理实验，分析并预测PAM与等离子体的耦合和电流驱动性能。最终目标是掌握PAM天线的耦合分析和优化设计方法，指导物理实验研究。研究成果可应用于将来EAST装置的高性能4.6GHz低杂波天线的设计，满足未来EAST装置的高参数和稳态运行要求。

中文关键词： 低杂波电流驱动；PAM；耦合；功率谱；

英文摘要： Lower Hybrid Current Drive (LHCD) is one of the most efficient means to drive plasma current non-inductively in tokamak. With the power improvement of the EAST auxiliary heating system and the steady state operation, the general used fully active multijunction antenna should be put far away from the high temperature plasma, so as to avoid being damaged by the heat radiation. However, the electron density at the mouth of the antenna will be much lower, and this will lead to bad wave coupling with the plasma, and decrease the current drive efficiency. The Passive-Active Multijunction (PAM) antenna may be the best candidate for EAST in the future because of its good coupling in low edge densities even near the cutoff density. Through establishing the three-dimensional coupling model of the antenna and plasma, this proposal will study the coupling characteristics of the PAM waveguide array antenna in different plasma density models, and explore the method to improve the current drive efficiency of the PAM. Then, we will study the integrated optimization design method of the PAM, considering the plasma load. Finally, combining the physics experiments on EAST, We will analyze and predict the wave coupling with plasma and the performance of current drive of the PAM antenna. The main objective of this research is to mas

英文关键词： LHCD；PAM；Coupling；Power Spectrum；