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理论分析了影响相对论速调管放大器(RKA)输出微波相位的相关因素,同时采用粒子模拟程序分析了RKA输出微波相位随电压、束流、电子束尺寸、电子束前沿和延迟时间等电子束参数以及腔体和漂移管长度等几何参数的变化,另外还开展了RKA相位特性的初步实验研究.研究结果表明,电压、束流和电子束尺寸的改变,会造成RKA相移的改变,引导磁场、电子束前沿和延迟时间以及注入微波功率在适当范围内改变不会造成明显的RKA相移改变.RKA的相位灵敏度为2.6°,相位抖动小于20°.
The related factors affecting the output microwave phase of the RKA amplifier are analyzed theoretically. At the same time, a particle simulation program is used to analyze the effects of the RKA output microwave phase parameters such as voltage, beam current, electron beam size, electron beam front and delay time As well as the geometrical parameters such as the length of the cavity and the drift tube. In addition, a preliminary experimental study on the phase characteristics of RKA has been carried out. The results show that the change of the voltage, beam current and electron beam size will cause the phase shift of RKA, , The beam front and delay times, and the injected microwave power, change within the proper range will not result in significant RKA phase shift with phase sensitivity of 2.6 ° and phase jitter of less than 20 °.