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

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

doi:10.1007/s41365-023-01279-z

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

ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS | Updated：2023-09-19

- Fault locating for traveling-wave accelerators based on transmission line theory
- Nuclear Science and Techniques Vol. 34, Issue 8, Article number: 116(2023)
- Affiliations：
  
  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
- Author bio：
  
  † TongningHu@hust.edu.cn
- Funds：
- DOI：10.1007/s41365-023-01279-z
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Tong-Ning Hu, Hai-Meng Wang, Yi-Feng Zeng, et al. Fault locating for traveling-wave accelerators based on transmission line theory. [J]. Nuclear Science and Techniques 34(8):116(2023)
DOI：

Tong-Ning Hu, Hai-Meng Wang, Yi-Feng Zeng, et al. Fault locating for traveling-wave accelerators based on transmission line theory. [J]. Nuclear Science and Techniques 34(8):116(2023) DOI： 10.1007/s41365-023-01279-z.

摘要

Abstract

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 fundamental 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 supplement to existing methods, facilitating solution to construction problems at an affordable cost.

关键词

Keywords

Traveling-wave structureRF breakdownFault locatingTransmission line

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