@article{YUAN2023, 
author = {Yuzhang YUAN and Jin MENG and Danni ZHU and Haitao WANG and Yancheng CUI},
title = {Analysis of the thermal effect of electromagnetic pulse on high frequency structure},
year = {2023},
journal = {Journal of National University of Defense Technology},
volume = {45},
number = {1},
pages = {144-149},
keywords = {high power microwave, high frequency structure, microwave thermal loss, gas desorption},
url = {https://www.sciopen.com/article/10.11887/j.cn.202301016},
doi = {10.11887/j.cn.202301016},
abstract = {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.}
}