Nonlinear characteristics of a coaxial-waveguide cyclotron autoresonance maser (CARM) amplifier
Nonlinear characteristics of a coaxial-waveguide cyclotron autoresonance maser (CARM) amplifier
复制标题
DOI：
10.1088/0022-3727/39/2/027
复制
发表时间：
2005-01
期刊：
影响因子：
--
通讯作者：
C. Qiu;Shi-Chang Zhang;Hui-Bo Zhang;Y. Lai
中科院分区：
文献类型：
--
作者：
C. Qiu;Shi-Chang Zhang;Hui-Bo Zhang;Y. Lai
建立了同轴波导回旋自谐振脉塞放大器的非线性自洽模拟模型，分析了器件的非线性特性。分析了圆柱波导和同轴波导中的模式谱。研究了电子束速度分布和电子束与波导轴之间的不对准对器件性能的影响，发现电子束速度分布和电子束与波导轴的不对准对器件的功率和效率是不利的。具体模拟结果表明，当轴向速度分布为1%时，输出功率和效率分别从493.4 kW和10.97%下降到382.33 kW和8.5%，而在0.1 cm失调时，效率下降到3.33%。然而，采用斜率ε=−为0.001 cm−1、起始位置z=25 cm的锥形引导磁场，可将功率和效率分别提高到1.84 mW和40.82%。
A detailed model of nonlinear self-consistent simulation for a coaxial-waveguide cyclotron autoresonance maser amplifier is presented to analyse the nonlinear characteristics of the device. Mode spectrums in cylindrical-waveguide and coaxial-waveguide are analysed. The effects of the electron-beam velocity spread and the misalignment between the electron-beam axis and the waveguide axis on the characteristics of the device are investigated and found to be detrimental to the power and efficiency. Specific simulations show that the output power and the efficiency drop from 493.4 kW and 10.97% to 382.33 kW and 8.5% when the axial velocity spread is 1% and decrease to 3.33% efficiency at 0.1 cm misalignment. However, the use of a tapering guide magnetic field with a slope ε = −0.001 cm−1 and the starting position z = 25 cm may enhance the power and efficiency to 1.84 MW and 40.82%, respectively.