High power klystron design and analysis

The effects of cavity voltage, phase, and drift length are studied numerically in the high power, multicavity klystron with the aid of a one-dimensional, relativistically correct large-signal computer code. Using the concept of Mihran´s merit figure, optimum configurations are presented for the three and four cavity klystron. These designs exhibit a high degree of electron bunching and a small velocity spread at the location of the output gap. The results are applicable to klystrons with more than four cavities since the power extraction sections considered here may be preceded by several small-signal cavities.