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Detailed here are the characteristics of the designs of a 500-kV, 45-A electron gun and two 10-GHz gyroklystron circuits. The electron gun produces a rotating beam by passing an annular, linearly streaming beam through a nonadiabatic magnetic transition followed by an adiabatic-compression region. It is demonstrated that the same gun can produce either a small-orbit beam suitable for interaction with a TEo01 cavity mode or a large-orbit beam suitable for interaction with a TEo31 cavity mode. A detailed comparison of the relevant circuit characteristics, including peak gain and efficiency, performance degradation with increasing velocity spread, and AM and PM sensitivities to voltage and current fluctuations, is made.
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Lawson et al. (1987) studied this question.
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