电磁脉冲对高频结构的热效应分析  

Analysis of the thermal effect of electromagnetic pulse on high frequency structure

作　　者：袁玉章 孟进[1] 朱丹妮 王海涛 崔言程 YUAN Yuzhang;MENG Jin;ZHU Danni;WANG Haitao;CUI Yancheng(National Key Laboratory of Science and Technology on Vessed Intepated Power System,Naval University of Engineering,Wuhan 43003,China)

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,湖北武汉430033

出　　处：《国防科技大学学报》2023年第1期144-149,共6页Journal of National University of Defense Technology

基　　金：国家自然科学基金青年基金资助项目(51907202)。

摘　　要：对于Cerenkov型器件,由高频结构温升引发的热脱附会造成的射频击穿,进而导致输出功率降低和脉冲缩短。基于此,研究了电磁脉冲对高频结构的加热温升效应,推导了高频结构的温升公式,指出了理论公式的适用范围,并给出了数值求解试件温升的方法。以二周期1 MV·cm^(-1)的高频结构为例,进行了温升的数值计算和仿真研究。结果表明,脉宽100 ns的单脉冲对不锈钢试件的温升效应明显高于其他材料。当系统工作在高重频时,电磁脉冲的温升作用可能使金属材料达到气体脱附的阈值从而引发气体脱附形成局部高压。该研究可为高功率微波源中的气体脱附以及射频击穿等研究提供参考。For Cerenkov-type devices,the thermal desorption caused by the temperature rise of the high-frequency structure can cause radio frequency breakdown,which in turn leads to a decrease in output power and a shortened pulse.Based on this,the heating temperature rise effect of electromagnetic pulses on the high-frequency structure was studied,the temperature rise formula of the high-frequency structure was deduced,the scope of application of the theoretical formula was pointed out,and a numerical method to solve the temperature rise of the specimen was given.Taking the two-period 1 MV·cm^(-1) high-frequency structure as an example,the numerical calculation and simulation study of temperature rise were carried out.Results show that the temperature rise effect of a single pulse with a pulse width of 100 ns on the stainless steel specimen is significantly higher than that of other materials.When the system is working at a high repetition frequency,the temperature rise of electromagnetic pulses may cause the metal material to reach the threshold of gas desorption and cause the gas to desorb to form a local high pressure.The research in the thesis can provide reference for the research of gas desorption and radio frequency breakdown in high power microwave sources.

关 键 词：高功率微波 高频结构 微波热损耗 气体脱附 

分 类 号：TN12[电子电信—物理电子学]