提高相对论返波管超辐射峰值功率的新途径
Feasible ways of inceasing peak superradiant-power of relativistic-backward-wave-oscillator
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摘要: 基于相对论返波管束波互作用的非线性自洽方程组，针对超辐射机制相对论返波管计算模型，编制程序数值研究了二极管电压、电流、耦合阻抗等参数对输出超辐射的影响，提出了提高相对论返波管超辐射峰值功率的新途径。通过全电磁粒子模拟程序验证了所得结论：超辐射机制下，通过电子束脉冲内线性调制二极管电压和电流，以及采用非均匀耦合阻抗的混合优化方式，可以增加束波共振范围和改善束波换能效率，达到进一步提高相对论返波管超辐射峰值功率的目的。Abstract: The nonlinear consistent equations were put forward which could describe the beam-wave interaction in relativistic-backward-wave-oscillator(RBWO). The effects of different parameters on the peak superradiant-power of RBWO, such as accelerating voltage, beam current and coupling impedance, were studied and analyzed by solving the beam-wave interaction nonlinear consistent equations numerically. The PIC simulation results indicate that in superradiant regime, the peak superradiant-power increases markedly by linear-modulating diode voltage and current and adopting non-uniform slow-wave structure, because of correspondingly extended resonating-voltage range and improved energy-exchange efficiency of beam and wave.
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