X波段长脉冲高功率微波产生的实验研究  

Experimental investigation of X-band long pulse high-power microwave generation

作　　者：张军[1] 钟辉煌[1] 舒挺[1] 刘振祥[1] 黄科[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《强激光与粒子束》2008年第3期443-446,共4页High Power Laser and Particle Beams

基　　金：国家高技术发展计划项目

摘　　要：获得长脉冲高功率微波(HPM)输出是HPM源技术追求的重要目标之一。从物理机理上分析了影响慢波结构HPM器件实现长脉冲HPM输出的因素,并利用长脉冲脉冲功率源和过模慢波结构HPM器件,开展了X波段长脉冲HPM产生实验。实验中,采用介质-铜阴极,并在慢波结构表面镀Cr,在导引磁场约0.7 T、二极管电压约400 kV、电流约10 kA、束流脉宽200 ns的条件下,获得了功率500 MW、脉宽约100 ns、主模为TM01的X波段长脉冲HPM输出。对实验结果的分析表明,脉冲功率源与HPM器件的阻抗不匹配,是导致HPM器件输出微波脉宽比电子束脉宽短、以及HPM器件输出微波功率效率较低的主要原因。Obtaining long-pulse high power microwave（HPM） is one of the most important aims for HPM sources technology. In the paper, difficulties in generating long pulse HPM for sources using slow-wave structures are discussed from the view point of physical mechanism, and some suggestions are given. By using of a long pulse pulsed power driver and an overmoded slow-wave structure HPM source, X-band long pulse HPM generating experiments were carried out. In the experiments, a kind of dielectric-copper cathode was adopted and the slow-wave structures of the HPM device were coated with Cr film. Under the condition of guiding magnetic field of 0.7 T, diode voltage of 400 kV,beam current of 10 kA with duration of 200 ns, an X-band long pulse HPM was obtained with power of 500 MW, duration of 100 ns and dominant mode of TM01. Analysis on the experimental results suggests that the reason for the pulse duration of HPM being shorter than that of beam current could be attributed to the impedance mismatching between the pulsed-power driver and the HPM device, which also leads to the low efficiency of the HPM device.

关 键 词：长脉冲高功率微波 X波段 过模慢波结构 脉冲功率源 

分 类 号：TN24[电子电信—物理电子学]