Investigation and suppression of pulse shortening problem caused by non-working mode self-excitation in an S-band long pulse relativistic klystron amplifier
研究了相对论速调管放大器中的脉冲缩短问题.分析表明杂模振荡是引起脉冲缩短的重要原因.利用粒子模拟对振荡的模式进行了分析,研究了振荡的机理,在粒子模拟中利用吸收介质对杂模实现了有效的抑制.最后,在实验中解决了相对论速调管放大器中的脉冲缩短问题,在输出微波峰值功率约为920 MW时将脉宽由77 ns提高到137 ns.
【英文摘要】
We have investigated the pulse shortening problem of relativistic klystron amplifier. It is shown that non-working mode self-excitation is an important cause of pulse shortening. Theoretical and numerical analyses show the mechanism of non-working mode self-excitation caused by the coupling between cavities. By the use of radio frequency absorbers,the problem of non-working mode self-excitation can be solved. In the experiment, the RF output power is 920 MW,the output power pulse width of the device can be ...
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