回旋速调管注-波互作用非线性理论研究
Nonlinear theory of beam-wave interaction for gyroklystron
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摘要: 利用自洽非线性理论对回旋速调管放大器中的电子注-波互作用进行了时域瞬态分析，建立了多腔回旋速调管非线性理论，给出了相应的电子运动方程和复数形式的互作用瞬态场方程。给出并分析了一支工作在TE01模Ka波段四腔回旋速调管注-波互作用的数值计算结果，当电子注电压为72.8 kV，电流为11.8 A，速度零散为5%时，可以得到335 kW的最大饱和功率输出，39.6%的电子效率及320 MHz的饱和带宽，与实验值相比较，二者较为吻合。Abstract: A transient analysis in time domain of beam-wave interaction for gyroklystron is made with self-consistent field theory. A nonlinear theory for gyroklystron with multiple cavities is then established, and corresponding electron motion equations and transient electromagnetic field equations with a complex form are given. For a Ka-band gyroklystron with four cavities, some numerical results of beam-wave interaction are given and analyzed. A saturated output power of 335 kW, corresponding to efficiency of 39.6% and saturated bandwidth of 320 MHz is achieved with a 72.8 kV, 11.8 A electron beam in TE01 mode when the speed spread is 5%. The numerical results agree well with the experimental data.
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Key words:
- gyroklystron /
- beam-wave interaction /
- nonlinear theory /
- millimeter wave amplifier
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