Measurement of the transfer function for a spoke cavity of C-ADS Injector I

Xue-Fang Huang; Yi Sun; Guang-Wei Wang; Shao-Zhe Wang; Xiang Zheng; Qun-Yao Wang; Rong Liu; Hai-Ying Lin; Mu-Yuan Wang

doi:10.1088/1674-1137/41/4/047001

Chinese Physics C> 2017, Vol. 41> Issue(4) : 047001 DOI: 10.1088/1674-1137/41/4/047001

Measurement of the transfer function for a spoke cavity of C-ADS Injector I

1.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
4.

Abstract
HTML
Reference
Related

PDF

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 eigenfrequency 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 excited by Lorentz force in the cavity of C-ADS, and the measured piezo fast tuner transfer function shows there are 12 mechanical eigenmodes from 0 to 500 Hz. According to these results, some effective measures have been taken to weaken the influence of helium pressure fluctuation, avoid mechanical resonances and improve the reliability of the RF system.
- Spoke012 ,
- Lorentz transfer function ,
- piezo fast tuner transfer function ,
- mechanical eigenmodes

References

[1]	J. Y. Tang, P. Cheng, H. P. Geng et al, Conceptual Physics Design for the China-ADS Linac, in Proceedings of PAC, 2013, Pasadena, CA, USA, 2013
[2]	H. Li, P. Sha, H. Huang et al, Chin. Phys. C, 36(8):761-764 (2012)
[3]	H. Li, J. P. Dai, P. Sha et al, Chin. Phys. C, 38(7):130-134 (2014)
[4]	N. Liu, Y. Sun, G. W. Wang et al, Chin. Phys. C, to be published
[5]	Z. A. Conway and M. U. Liepe, Fast piezoelectric actuator control of microphonics in the CW Cornell ERL injector cryomodule, in Proceedings of PAC09, Vancouver, BC, Canada
[6]	R. Rybaniec, L. J. Opalski, I. Wut et al, Microphonic disturbances prediction and compensation in pulsed superconducting accelerators, in Proceedings of IPAC2015, Richmond, VA, USA
[7]	Zachary A. Conway, Electro-mechanical interacttions in superconducting spoke-loaded cavities, Ph.D. Thesis (Urbana:University of Illinois at Urbana-Champaign, 2007)

[1]	Xiangrui Gao , Yu Jia , Liuji Li , Xiaonu Xiong . Relativistic correction to gluon fragmentation function into pseudoscalar quarkonium. Chinese Physics C, 2017, 41(2): 023103. doi: 10.1088/1674-1137/41/2/023103
[2]	Na Liu , Yi Sun , Guang-Wei Wang , Zheng-Hui Mi , Hai-Ying Lin , Qun-Yao Wang , Rong Liu , Xin-Peng Ma . Tuner control system of Spoke012 SRF cavity for C-ADS injector I. Chinese Physics C, 2016, 40(9): 097001. doi: 10.1088/1674-1137/40/9/097001
[3]	A. Mirjalili , K. Keshavarzian . Meson polarized distribution function and mass dependence ofthe nucleon parton densities. Chinese Physics C, 2014, 38(8): 083101. doi: 10.1088/1674-1137/38/8/083101
[4]	WANG Yu-Sa , YANG Yan-Ji , CHEN Yong , LIU Xiao-Yan , CUI Wei-Wei , XU Yu-Peng , LI Cheng-Kui , LI Mao-Shun , HAN Da-Wei , CHEN Tian-Xiang , HUO Jia , WANG Juan , LI Wei , HU Wei , ZHANG Yi , LU Bo , YIN Guo-He , ZHU Yue , ZHANG Zi-Liang . Measurements of charge transfer efficiency in a proton-irradiated swept charge device. Chinese Physics C, 2014, 38(6): 066001. doi: 10.1088/1674-1137/38/6/066001
[5]	GENG Chao , LIU Jie , ZHANG Zhan-Gang , XI Kai , GU Song , HOU Ming-Dong , SUN You-Mei , DUAN Jing-Lai , YAO Hui-Jun , MO Dan , LUO Jie . Modeling the applicability of linear energy transfer on single event upset occurrence. Chinese Physics C, 2013, 37(6): 066001. doi: 10.1088/1674-1137/37/6/066001
[6]	MA Kai , WANG Jian-Hua , YUAN Yi . Wigner function for the Dirac oscillator in spinor space. Chinese Physics C, 2011, 35(1): 11-15. doi: 10.1088/1674-1137/35/1/003
[7]	LI A-Hong , YIN Xue-Jun , FU Shi-Nian , SUN Zhi-Rui . Application of the transfer matrix for tuning the CSNS-DTL. Chinese Physics C, 2011, 35(10): 959-963. doi: 10.1088/1674-1137/35/10/014
[8]	PENG Yue-Mei , XU Gang . Analytical transfer matrix of a quadrupole fringe. Chinese Physics C, 2011, 35(11): 1047-1052. doi: 10.1088/1674-1137/35/11/013
[9]	Atashbar Tehrani . Nucleon/nuclei polarized structure function, using Jacobi polynomials expansion. Chinese Physics C, 2010, 34(9): 1534-1537. doi: 10.1088/1674-1137/34/9/093
[10]	WANG Zhi , CHEN Jia-Er , LU Yuan-Rong , GUO Zhi-Yu , YAN Xue-Qing , ZHU Kun , KANG Ming-Lei , FANG Jia-Xun . Study of separated function radio frequency quadrupoles accelerator. Chinese Physics C, 2010, 34(4): 502-505. doi: 10.1088/1674-1137/34/4/017
[11]	HUANG Yu-Fei , LI Guang-Liang . Transfer matrix for the open chain from giant gravitons. Chinese Physics C, 2010, 34(7): 949-952. doi: 10.1088/1674-1137/34/7/004
[12]	YAO Zhong-Yuan , LU Xiang-Yang , ZHANG Bao-Cheng , QUAN Sheng-Wen , HE Fei-Si , ZHAO Kui . Analysis of the impacts of mechanical errors on the RF performance of a single spoke cavity. Chinese Physics C, 2010, 34(5): 576-579. doi: 10.1088/1674-1137/34/5/012
[13]	CHEN Guang-Ling , TIAN Shun-Qiang , JIANG Bo-Cheng , LIU Gui-Min . A GUI tool for beta function measurement using MATLAB. Chinese Physics C, 2009, 33(4): 297-300. doi: 10.1088/1674-1137/33/4/012
[14]	CHEN Jia-Er , ZHU Kun , GUO Zhi-Yu , LU Yuan-Rong , YAN Xue-Qing , GAO Shu-Li , WANG Zhi , KANG Ming-Lei , FANG Jia-Xun , YU Mao-Lin , LI Wei-Guo , GUO Ju-Fang . Power test of the separated function RFQ accelerator. Chinese Physics C, 2009, 33(S2): 56-59. doi: 10.1088/1674-1137/33/S2/015
[15]	WANG Xiao-Xiong , LI Hong-Nian , WANG Peng , NI Jing-Fu , WANG Jia-Ou , QIAN Hai-Jie , KURASH Ibrahim , . Charge transfer of 1 ML C₆₀/Ag(100). Chinese Physics C, 2009, 33(11): 996-1000. doi: 10.1088/1674-1137/33/11/013
[16]	XIAO Yong-Chuan , FU Shi-Nian . Study on the Lorentz detuning and tuning of β=0.3, 352 MHz spoke cavity. Chinese Physics C, 2009, 33(9): 815-818. doi: 10.1088/1674-1137/33/9/021
[17]	Yu Qingchang . Contour Function Theory for Transport of Charged Particle Beams. Chinese Physics C, 1995, 19(S3): 319-323.
[18]	Liu Guanhua , Zhan Wenlong , Zhu Yongtai , Guo Zhongyan , Hu Xiaoqing , Xi Hongfei , Zhou Jianqun , Yin Shuzhi , Feng Enpu , Zhao Youxiong , Wei Zhiyong , Fan Enjie . Competition Between Fragmentation and Transfer in 46.7 MeV/u ¹²C Induced Reactions. Chinese Physics C, 1993, 17(S1): 73-80.
[19]	Wang Shan , Liu Yiming , Jiang Yuzhen , Chen Xiaofan , D. Keane , S. Y. Fung , S. Y. Chu . Azimuthal Correlation Function and the Nuclear Equation of State. Chinese Physics C, 1990, 14(S4): 361-366.
[20]	WANG Tai-Feng , XIA Lin-Hua , MIAO Yuan-Jun , ZHOU Quan-Hua , JIN Qing-Hua , GAO Cheng-Qun , CAI Chong-Hai . EXCITATION FUNCTION FOR α TRANSFER REACTION. Chinese Physics C, 1988, 12(6): 829-832.

Access

Get Citation

Xue-Fang Huang, Yi Sun, Guang-Wei Wang, Shao-Zhe Wang, Xiang Zheng, Qun-Yao Wang, Rong Liu, Hai-Ying Lin and Mu-Yuan Wang. Measurement of the transfer function for a spoke cavity of C-ADS Injector I[J]. Chinese Physics C, 2017, 41(4): 047001. doi: 10.1088/1674-1137/41/4/047001

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2016-09-01

Fund

null

Article Metric

Article Views(1537)
PDF Downloads(39)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Measurement of the transfer function for a spoke cavity of C-ADS Injector I

Corresponding author: Xue-Fang Huang,

1. University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2016-09-01

Available Online: 2017-04-05

Fund Project: null

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 eigenfrequency 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 excited by Lorentz force in the cavity of C-ADS, and the measured piezo fast tuner transfer function shows there are 12 mechanical eigenmodes from 0 to 500 Hz. According to these results, some effective measures have been taken to weaken the influence of helium pressure fluctuation, avoid mechanical resonances and improve the reliability of the RF system.

HTML

Reference (7)

Measurement of the transfer function for a spoke cavity of C-ADS Injector I

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article