Multipactor suppression in amplitude modulated radio frequency fields
Multipactor suppression in amplitude modulated radio frequency fields
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DOI：
10.1063/1.1410980
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发表时间：
2001-10
影响因子：
2.2
通讯作者：
V. Semenov;A. Kryazhev;D. Anderson;M. Lisak
中科院分区：
文献类型：
--
作者：
V. Semenov;A. Kryazhev;D. Anderson;M. Lisak
本文用解析和数值方法研究了在一个简单的一维金属间隙中，由两个频率相近但分离的载波组成的均匀射频场中的二次电子倍增效应。结果表明，与单色情况（即，单载波操作），如果选择载波幅度和频率分离的适当组合，则由两个载波的拍频产生的时变包络导致对二次电子倍增器击穿的抑制。此外，这种组合既不取决于间隙宽度，也不取决于频率范围。基于这些结果，可以得出初步的结论，即从避免击穿的角度来看，多载波操作的制度是非常有前途的。这在复杂几何结构的系统中尤其如此，其中单载波操作可能导致对于任何高水平的rf功率的二次电子倍增器击穿。
An analytical and numerical investigation is made of the multipactor phenomenon in a simple one-dimensional metallic gap exposed to a homogeneous rf field consisting of two carrier waves with close but separated frequencies. It is shown that in contrast to the monochromatic case (i.e., single carrier operation), the time varying envelope resulting from the beating of the two carrier waves leads to a suppression of multipactor breakdown, if appropriate combinations of carrier amplitudes and frequency separation are chosen. Furthermore, this combination depends neither on gap width nor on frequency range. Based on these results it is possible to draw the tentative conclusion that the regime of multicarrier operation is very promising from the point of view of avoiding breakdown. This is particularly so in systems of complicated geometry where single carrier operation may lead to multipactor breakdown for any high level of rf power.