EAST 4.6 GHz多结波导阵天线电磁特性研究

EAST 4.6 GHz多结波导阵天线电磁特性研究

内容简介：多结波导阵天线是 EAST 超导托卡马克装置等离子体加热和电流驱动系统的关键部件，其结构性能直接关系到等离子体电流的加热效果和驱动效率。当等离子体电流破裂时，极短时间内的电流衰减将会在天线上引起感应电流，此电流与众多磁场作用产生电磁力和电磁扭矩，从而对天线结构造成损坏。该文研究了 EAST 装置等离子体电流破裂下4.6 GHz 天线的电磁问题，采用有限元方法分析计算了天线的电磁力及力矩，并给出了不同电磁载荷条件下天线的电磁应力及形变。数值模拟的结果为低杂波天线的设计提供了重要指导。

Abstract：The multijunction waveguide array antenna is one of the key components for plasma heating and current drive on EAST superconducting Tokamak device, and its structure performance determines the plasma current heating and drive efficiency. When the plasma current rupture, the eddy currents are induced in the antenna because of the plasma current decay in a short period. These induced currents interact with the strong static magnetic field to produce forces and torques in the antenna, which will damage the structure of the antenna. Electromagnetic analysis of 4.6 GHz Lower Hybrid Wave (LHW) antenna in EAST is investigated. The forces and torques of LHW antenna are performed using the finite element method. Then the electromagnetic stresses and displacements due to electromagnetic loads are also calculated. The simulation results offer guidance for the design and manufacture of the antenna.

作者：李军, 刘甫坤, 刘太君, 刘亮, 叶焱, 化锋, 夏银水,

关键词：低杂波天线, 等离子体电流, 有限元, 电磁力, 力矩,