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回旋行波管放大器是一种具有高功率、高频率、宽带宽的毫米波放大器,TE02模二次谐波回旋行波管放大器在保持基波回旋行波管放大器的基础上极大地减小了工作磁场,从而具有广阔的应用前景.利用两段分布式损耗的互作用结构,有效抑制了绝对不稳定性和回旋返波振荡,避免了模式互作用电路引起的模式畸变,提高了输出功率,在一定程度上克服了谐波互作用较弱的缺点,满足了扩展功率容量和放大器长时间稳定工作的要求.非线性模拟结果和粒子模型(particleincell)模拟结果均表明,在工作电压为100kV,工作电流为20A的情况下,获得了15%的效率和5%的带宽,输出峰值功率达到300kW.
The gyrotron TWT is a millimeter-wave amplifier with high power, high frequency and wide bandwidth. The TE02 mode second harmonic gyrotron TWT has been greatly reduced on the basis of the fundamental-wave TWT amplifier Working magnetic field, which has broad application prospects.Using the two-stage distributed loss interaction structure, the absolute instability and the gyro-backwave oscillation are effectively suppressed, the mode distortion caused by the mode interaction circuit is avoided, the output power is improved, To a certain extent, overcome the shortcomings of weak harmonic interaction and meet the requirements of extended power capacity and long-term stable operation of the amplifier.Nonlinear simulation results and particle model simulation results show that at the operating voltage of 100kV, With a working current of 20A, 15% efficiency and 5% bandwidth are achieved and the output peak power reaches 300kW.