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首页> 外文期刊>Physics of plasmas >Ping-pong modes and higher-periodicity multipactor
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Ping-pong modes and higher-periodicity multipactor

机译：乒乓模式和高周期多跳

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Multipactor is a vacuum discharge driven by secondary electron emission. Multiple period multipactors have long been known to exist but have been studied less extensively. In a period-n multipactor, electrons undergo multiple impacts in one rf period, with the synchronous phase alternating periodically between multiple values. A novel resonant form is proposed that combines one- and two-surface impacts within a single period, provided the total transit time is an odd number of rf half-periods and the product of secondary yields exceeds unity. For low fD products, the simplest such mode is shown to significantly increase the upper electric field boundary of the multipacting region and lead to overlap of higher-order bands. The results agree nicely with 3-D particle-in-cell code simulations. An alternative, map-based method is introduced for analyzing higher-periodicity multipactor. Practical implications of the findings are discussed, including consequences for multipactor suppression strategies using a dc magnetic field.
机译：Multipactor是由二次电子发射驱动的真空放电。早就知道存在多个周期的多变量，但是研究较少。在周期为n的多周期中，电子在一个rf周期中受到多次冲击，同步相位在多个值之间周期性地交替。提出了一种新颖的共振形式，该形式在单个周期内组合了一个表面和两个表面的冲击，条件是总的传递时间是rf半周期的奇数，并且次级屈服的乘积超过1。对于低fD的产品，最简单的这种模式显示为显着增加了多步区域的上部电场边界，并导致高阶带重叠。结果与3-D单元格内粒子模拟非常吻合。引入了另一种基于地图的方法来分析较高周期的多因子。讨论了发现的实际含义，包括使用直流磁场对多步抑制策略的影响。

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