含有部分填充等离子体柱的螺旋线混合模的理论分析  

STUDY OF THE HYBRID MODE IN THE HELIX WITH A PARTIALLY FILLED PLASMA COLUMN

作　　者：龚中麟[1] 陈光[1] 张晋林[2] 何润亚[1] 

机构地区：[1]北京大学电子学系,北京100871 [2]信息产业部电子12所,北京100016

出　　处：《电子与信息学报》2003年第10期1418-1424,共7页Journal of Electronics & Information Technology

基　　金：高功率真空电子学国家实验室基金

摘　　要：导出了含有部分填充等离子体柱的螺旋线中混合模的色散方程,计算出混合模的色散曲线并由此探讨了混合模的形成条件。研究了约束磁场对轴向电场的径向分布的影响。在低约束磁场下轴向电场的径向分布显示场与电子束的耦合显著增强,无聚焦磁场时存在着沿等离子体柱面传播的 TG模。The dispersion equation of the axial symmetric hybrid mode inside the helix with a partially filled plasma column is derived, its dispersion curves are calculated, and the conditions to form that mode are illustrated. The effect of confining magnetic field on the radial profile of axial electric field is studied. In the situation that the strength of confining magnetic field has been entrusted a practical low value, the calculated radial profile shows much stronger coupling of the filed to the electron beam. In the situation without confining magnetic field, a Trivelpiece-Gould mode propagating along the surface of the plasma column presents.

关 键 词：等离子体柱 螺旋线混合模 色散方程 径向分布 行波管 

分 类 号：TN124[电子电信—物理电子学]