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核聚变与等离子体物理 ›› 2010, Vol. 30 ›› Issue (1): 60-66.

• 核聚变工程技术 • 上一篇    下一篇

低杂波多结波导阵天线耦合特性的数值分析

贾 华,秦永亮,刘甫坤,匡光力   

  1. (中国科学院等离子体物理研究所,合肥 230031)
  • 收稿日期:2008-12-15 修回日期:2009-08-04 出版日期:2010-03-15 发布日期:2010-05-11
  • 作者简介:贾华(1982-),男,河南省新乡市人,博士研究生,研究方向:微波工程与等离子体物理。

Numerical analysis on coupling properties of the LHCD multijunction launcher

JIA Hua, QIN Yong-liang, LIU Fu-kun, KUANG Guang-li   

  1. (Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031)
  • Received:2008-12-15 Revised:2009-08-04 Online:2010-03-15 Published:2010-05-11

摘要: 通过数值模拟研究了低杂波多结波导阵天线的耦合特性。采用线型耦合理论,用艾黎函数计算了等离子体阻抗,推导出常规波导阵对等离子体的散射矩阵,并利用它和天线自身的散射矩阵研究了HT-7装置低杂波多结波导阵天线的耦合特性;计算了其平均功率反射系数、方向性系数和功率谱与等离子体边缘密度和主波导相位差等参数的关系。结果表明,与常规波导阵相比,由于多结波导阵天线存在自匹配特性,其天线功率反射系数小,且对相位不敏感。但由于存在多余副瓣,驱动效率较低。

关键词: 低杂波电流驱动, 多结波导天线, 耦合, 功率谱, 散射矩阵

Abstract: The coupling properties of the Lower Hybrid Current Drive (LHCD) multijunction (MJ) launcher are investigated numerically. The Airy function is used to calculate the plasma impedance and the grill-plasma scattering matrix is deduced, then the coupling properties of the HT-7 LHCD MJ launcher are studied with the antenna scattering matrix and the grill-plasma scattering matrix based on the liner coupling theory. The average power reflection coefficient, directivity, power spectrum are obtained for different edge plasma densities and for different phasings between main waveguides. The results show that the power reflection coefficient of the MJ launcher is much lower and less sensitive to the phase difference than that of the conventional grill because of its self-matching characteristic. However, due to the excrescent side lobe, the current drive efficiency is lower.

Key words: Lower hybrid current drive, Multijunction launcher, Coupling, Power spectrum, Scattering matrix

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