磁绝缘传输线振荡器中的次级电子倍增现象

Moltipactor discharge in a magnetically insulated transmission line oscillator

根据磁绝缘传输线振荡器(MILO)的结构特点,建立了一个单边次级电子倍增(multipactor)模型,通过对敏感曲线、相位聚焦的计算,分析了MILO中发生multipactor的物理图象.结果表明从聚焦区域大小看,单边发生multipactor比双边要严重.在MILO中发生的multipactor都属于单边模式,并且有出现电子掠入射金属表面的大量机会,因此它发生multipactor比O型器件严重.

According to the structure characteristic of the magnetically insulated transmission line oscillator （ MILO）, a one-sided mul- tipactor discharge model is present. Through the calculations of the susceptibility curves and phase focusing effect, the physical conditions of the muhipactor discharge occurring in the MILO are analyzed. The results show that one-sided muhipactor modes have a wider phase focusing range than two-sided modes, and there is many chances for electronic grazing incidence on the metal surface for MILO. So the muhipactor discharge is more serious for MILO than O-type devices.