Fault locating for traveling-wave accelerators based on transmission line theory  

作　　者：Tong-Ning Hu Hai-Meng Wang Yi-Feng Zeng Hong-Jie Xu Li Chen Guang-Yao Feng Yuan-Ji Pei 

机构地区：[1]State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China [2]State Grid Fujian Economic Research Institute,Fuzhou 350012,China [3]National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,China

出　　处：《Nuclear Science and Techniques》2023年第8期24-34,共11页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(No.11905074).

摘　　要：Radio-frequency(RF)breakdown analysis and location are critical for successful development of high-gradient traveling-wave(TW)accelerators,especially those expected to generate high-intensity,high-power beams.Compared with commonly used schemes involving dedicated devices or complicated techniques,a convenient approach for breakdown locating based on transmission line(TL)theory offers advantages in the typical constant-gradient TW-accelerating structure.To deliver such an approach,an equivalent TL model has been constructed to equate the TW-accelerating structure based on the fun-damental theory of the TL transient response in the time domain.An equivalence relationship between the TW-accelerating structure and the TL model has been established via analytical derivations associated with grid charts and verified by TL circuit simulations.Furthermore,to validate the proposed fault-locating method in practical applications,an elaborate analysis via such a method has been conducted for the recoverable RF-breakdown phenomena observed at an existing prototype of a TW-accelerating-structure-based beam injector constructed at the Huazhong University of Science and Technology.In addition,further considerations and discussion for extending the applications of the proposed method have been given.This breakdown-locating approach involving the transient response in the framework of TL theory can be a conceivable supple-ment to existing methods,facilitating solution to construction problems at an affordable cost.

关 键 词：Traveling-wave structure RF breakdown Fault locating Transmission line 

分 类 号：TL50[核科学技术—核技术及应用]