The magnetron “threshold voltage” revisited
The magnetron “threshold voltage” revisited
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重新审视磁控管“阈值电压”
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
Xiao Chen
中科院分区：
文献类型：
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作者：
P. Lindsay;M. Esterson;Xiao Chen
鉴于人们对高功率磁控管重新产生了兴趣，用一种新的简化方法重新推导了相对论和非相对论情况下的一个重要磁控管参数——阈值电压。本文的主要目的是研究阈值电压的物理意义，并表明，与长期确立的观点相反，不需要对振荡幅度进行限制。事实上，这个名字本身就是一个用词不当，因为在实践中，阈值电压是一个近似的直流阳极电压，在这个电压下，管在提供全功率时运行。在我们看来，正是这个特性使得阈值电压在实践中如此重要和有用。一组数值计算证实了我们的分析，也揭示了洛伦兹“蝴蝶效应”的一种形式，这种形式与振动的感知开始有关。
In view of the revival of interest in high-power magnetrons, an important magnetron parameter called the threshold voltage has been rederived for both relativistic and nonrelativistic cases using a novel and simplified approach. The main purpose of the paper is to investigate the physical significance of the threshold voltage and to show that, contrary to a long established opinion, no restriction on the amplitude of oscillations is required. In fact, the name itself is a misnomer, since in practice the threshold voltage is an approximate dc anode voltage at which the tube operates when delivering full power. It is this feature which, in our opinion, makes the threshold voltage so important and useful in practice. A set of numerical computations confirms our analysis and also reveals a form of Lorenz’s “butterfly effect” associated with the perceived start of oscillations.