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

作　　者：董烨[1] 董志伟[1] 杨温渊[1] 周海京[1] 姜幼明[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100088

出　　处：《强激光与粒子束》2008年第7期1167-1172,共6页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(10705006);中国工程物理研究院基金资助课题(2005Z0403)

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。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.

关 键 词：高功率微波 超辐射 相对论返波管 束波互作用 数值计算 粒子模拟 

分 类 号：TN125[电子电信—物理电子学]