衍射输出相对论磁控管的高重频短脉冲运行实验研究

Experimental Investigation of a Relativistic Magnetron with Diffraction Output under Repetitive Short Voltage Pulses Condition

本文报道了近期衍射输出相对论磁控管在低电压、短脉冲、高重复频率条件下的初步实验研究结果。当外加电压约180k V,磁场约0.12T时,输出微波功率最高可达120MW,微波频率2.3GHz,功率效率22%。在半高宽约7ns,平顶约2.5ns的电脉冲条件下,输出微波底宽3ns,半高宽1.5ns。当器件以50Hz和100Hz高重复频率运行时,输出微波幅值稳定性受电脉冲波动和通电螺线管内的电流波动影响较大,微波功率波动范围90MW至120MW。以脉冲串的形式、长时间高重频运行20000炮次后,器件内部无明显的烧蚀出现。

This paper reports the experimental investigation of a relativistic Magnetron with Diffraction Output(MDO) under repetitive short voltage pulses condition. When applied voltage is ~180k V and axial magnetic field strength is ~0.12 T, the MDO radiates 120 MW of microwave power, 22% of power conversion efficiency, 2.3GHz of central frequency. When voltage pulse width is 7ns and plateau is 2.5ns, output microwave duration is 3ns with pulse width of 1.5ns. At repetitive rates of 50 Hz and 100 Hz, stability of radiated microwaves is related to ripples and jitters of applied voltage and solenoid current. Output microwave powers range from 90 MW to 120 MW. After 2×104 shots with high repetitive pulse string, there are no obvious damage and burns in the MDO.