X波段大功率耦合腔行波管3维粒子模拟
3D PIC simulation of X-band high power coupled cavity traveling wave tube
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摘要: 为提高行波管的增益和输出波形的稳定性，开展了带高频切断X波段大功率耦合腔行波管的研究工作。以点频7.2 GHz为例，对X波段耦合腔行波管的大信号注波互作用过程进行了3维粒子模拟，该行波管包含一处高频切断及两处微波集中衰减器。数值模拟结果表明：行波管腔数为40、电子束电压为17 kV、电流为0.8 A时，可获得2.0 kW的微波输出功率，增益达23 dB，电子效率达14.7%。Abstract: To improve the gain and stability of output microwave，an X-band high power coupled cavity traveling wave tube(CCTWT) with one RF sever and two RF lumped attenuators is studied. As an example of dot frequency microwave input，the large signal beam-wave interaction at 7.2 GHz of this X-band CCTWT is simulated using 3D PIC code. The simulated results show that this tube can produce an output power of 2.0 kW，an electron efficiency of 14.7% and a gain of 23 dB with a cavity number of 40，a beam voltage of 17 kV and a beam current of 0.8 A.
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