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26 April 2024

» arxiv » 1608.8293

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The measurement of the transfer function for the Spoke cavities of C-ADS project
Xue-Fang Huang ; Yi Sun ; Guang-Wei Wang ; Shao-Zhe Wang ; Xiang Zheng ; Qun-Yao Wang ; Rong Liu ; Hai-Ying Lin ; Mu-Yuan Wang ;
Date:	30 Aug 2016
Abstract:	The spoke cavities mounted in the China Accelerator Driven sub-critical System (C-ADS) have high quality factor(Q) and very small bandwidth, making them very sensitive to mechanical perturbations whether external or self-induced. The transfer function is used to characterize the response of the cavity eigen frequency to the perturbations. This paper describes a method to measure the transfer function of a spoke cavity. The measured Lorentz transfer function shows there are 206 Hz and 311 Hz mechanical eigenmodes in the cavities of C-ADS, and the measured piezo fast tuner transfer function shows there are 12 mechanical eigenmodes from 0 to 500 Hz. These results will play important roles when designing a corresponding cavity control system.
Source:	arXiv, 1608.8293
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