高效率超辐射相对论返波管
Superradiance relativistic backward wave oscillator with high power conversion efficiency
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摘要: 对新型同轴单程超辐射相对论返波管振荡器进行了进一步的研究。该振荡器的互作用区为同轴结构，外导体为一波纹波导，内导体为一光滑圆波导；辐射场从左端耦合到圆波导后输出，不需要截止颈。通过增加波纹周期数并调整互作用区末端波纹深度，器件的功率转换效率得到进一步的提高。当电子束电压为360 kV，电流为9.15 kA，外加磁场强度为2.7 T时，通过参数优化，模拟获得了瞬时峰值功率超过18 GW、脉冲宽度约400 ps，中心频率为8.1 GHz的微波输出，平均功率转换效率达到了275%。Abstract: Superradiance relativistic backward wave oscillator(SR-RBWO) with high power conversion efficiency is studied by simulation. Coaxial structure is used in the beam-wave interaction region. The outer conductor is a corrugated waveguide and the inner conductor is a smooth circular waveguide. Microwaves will be coupled to the circular waveguide and output from there. By increasing the period number and adjusting the corrugation depth near the collection end, the power conversion efficiency is improved furtherly. For an electron beam of 360 kV and 9.15 kA, with an applied magnetic field of 2.7 T, SR microwave pulse with 18 GW instantaneous power and 400 ps duration is obtained at a center frequency of 8.1 GHz by simulation, the power conversion efficiency reaches 275%.
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