基于可回收能力的空间行波管高效率研究

效率是行波管设计的重要指标之一。对于空间行波管，效率的提高可以立即转化为经济效益。本文通过对注波互作用电路参数的优化设计，得到便于收集的“作用完了”的电子注。通常具有高电子效率的电子注，能量分散较大，不利于收集。通过设定电子效率大于25%这个限制条件，来保证了具有高可回收能力的电子注，同时具有较高的输出功率。在遗传算法中调用3 维MTSS，用来计算注波互作用后的输出能量和电子能谱图。并对一支Ku 波段的螺旋线行波管进行优化设计，从数值计算结果来看，可回收效率提高到了89%，且具有26.9%的电子效率。

Efficiency Enhancement of Space TWT based on Collectability

High efficiency is one of the essential requirements for modern space Traveling Wave Tube (TWT) development, and a single percentage point increase of overall efficiency is very significant to translate into potential revenue increases. The enhancement of overall efficiency was realized by optimizing the helix pitch profile of a TWT to maximize the collector efficiency. The maximum collector efficiency of a TWT normally conflicts with the basic beam-wave interaction efficiency. Such a conflict has been mitigated via setting the electronic efficiency higher than 25% as a constraint of the algorithm to ensure a high output power. The 3-D large signal Beam-Wave Interaction Simulator (BWIS) of MTSS, which was employed to calculate the output power and the energy distribution of the spent beam, was integrated with the Genetic algorithm. The detailed design of a Ku-band helix traveling wave was described and maximum collector efficiency of 89% with electronic efficiency of 26.9% was achieved from the simulation results.