HOMs simulation and measurement results of IHEP02 cavity

ZHENG Hong-Juan; ZHAI Ji-Yuan; ZHAO Tong-Xian; GAO Jie

doi:10.1088/1674-1137/39/11/117006

Chinese Physics C> 2015, Vol. 39> Issue(11) : 117006 DOI: 10.1088/1674-1137/39/11/117006

HOMs simulation and measurement results of IHEP02 cavity

1.
Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Abstract
HTML
Reference
Related

PDF

Abstract：
In accelerator RF cavities, there exists not only the fundamental mode which is used to accelerate the beam, but also higher order modes (HOMs). The higher order modes excited by the beam can seriously affect beam quality, especially for the higher R/Q modes. 1.3 GHz low-loss 9-cell superconducting cavity as a candidate for ILC high gradient cavity, the properties of higher order mode has not been studied carefully. IHEP based on existing low loss cavity, designed and developed a large grain size 1.3 GHz low-loss 9-cell superconducting cavity (IHEP02 cavity). The higher order mode coupler of IHEP02 used TESLA coupler's design. As a result of the limitation of the mechanical design, the distance between higher order mode coupler and end cell is larger than TESLA cavity. This paper reports on measured results of higher order modes in the IHEP02 1.3 GHz low-loss 9-cell superconducting cavity. Using different methods, Q_e of the dangerous modes passbands have been obtained. The results are compared with TESLA cavity results. R/Q of the first three passbands have also been obtained by simulation and compared with the results of the TESLA cavity.
- 1.3 GHz 9-cell superconducting cavity ,
- low-loss shape ,
- higher order modes ,
- Qe ,
- experimental measurements

References

[1]	ZHAI Ji-Yuan, ZHAO Tong-Xian, Li Zhong-Quan et al. IHEP 1.3 GHz Low Loss Large Grain 9- cell Cavity Fabrication, Processing and Test. Proceedings of the 16th Workshop on RF Superconductivity. France, 2013. 305
[2]	Edwards D A. TESLA Test Facility Linac Design Report, Version1.0, 1 March 1995. Dt. Elektronen-Synchrotron DESY, MHF-SL Group, 1995
[3]	Wangler T P. RF Linear Accelerators 2nd Completely Revised and Enlarged Edition. Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, 2008. 168-170; 361-397
[4]	Jacek Sekutowicz. Higher Order Mode Coupler for TESLA. Proceedings of the 6th Workshop on RF Superconductivity, USA, 1994. 426
[5]	Monopole W R. Dipole and Quadrupole Passbands of the TESLA 9- cell Cavity. DESY-TESLA 2001-33, 2011. 34
[6]	ZHAO Tong-Xian. Researches on Accelerator Unit for Linear Collider (Ph. D. Thesis). Beijing: Institute of High Energy Physics, CAS, 2010 (in Chinese)
[7]	ZHANG Zhao-Tang. Measurement of Microwave system. Beijing: National Defence Industry Press, 1982. 10-19; 123-127 (in Chinese)
[8]	Altman J L. Microwave Circuits. New York: D. Van Nostrand Company, Inc., 1964. 219
[9]	Watanabe K. Studies on the Higher Order Mode of a 9cell Superconducting Cavity (Ph. D. Thesis). Tsukuba: GUAS/AS, 2007 (in Japanese)
[10]	SUN An, WANG Hai-Peng. Measurement Formulae for a Superconducting RF Cavity without Beam Load. SNS-NOTE-AP-135 Report, 2004

[1]	Zhi-Wei Zuo , Jun-Chen Pei , Xue-Yu Xiong , Yi Zhu . Global analysis of Skyrme forces with higher-order density dependencies. Chinese Physics C, 2018, 42(6): 064106. doi: 10.1088/1674-1137/42/6/064106
[2]	null . Electron bunch train excited higher-order modes in a superconducting RF cavity. Chinese Physics C, 2017, 41(4): 047002. doi: 10.1088/1674-1137/41/4/047002
[3]	Yun-Guo Jiang , Jia-Zhen Liu , Song He . Near integrability of kink lattice with higher order interactions. Chinese Physics C, 2017, 41(11): 113107. doi: 10.1088/1674-1137/41/11/113107
[4]	M. Mohsenzadeh , E. Yusofi . Higher order corrections to asymptotic-de Sitter inflation. Chinese Physics C, 2017, 41(8): 085101. doi: 10.1088/1674-1137/41/8/085101
[5]	Hong-Juan Zheng , Jie Gao , Zhen-Chao Liu . Cavity and HOM coupler design for CEPC. Chinese Physics C, 2016, 40(5): 057001. doi: 10.1088/1674-1137/40/5/057001
[6]	FANG Kai-Hong , ZOU Jian-Xin , LIU Dong-Dong , ZHAO Jiang-Tao . Experimental evidence for temperature effect on energy loss of low-energy D⁺ in liquid lithium. Chinese Physics C, 2015, 39(8): 084001. doi: 10.1088/1674-1137/39/8/084001
[7]	WEI Tao , YANG Guo-Jun , LI Yi-Ding , LONG Ji-Dong , HE Xiao-Zhong , ZHANG Xiao-Ding , JIANG Xiao-Guo , MA Chao-Fan , ZHAO Liang-Chao , YANG Xing-Lin , ZHANG Zhuo , WANG Yuan , PANG Jian , LI Hong , LI Wei-Feng , ZHOU Fu-Xin , SHI Jin-Shui , ZHANG Kai-Zhi , LI Jin , ZHANG Lin-Wen , DENG Jian-Jun . First experimental research in low energy proton radiography. Chinese Physics C, 2014, 38(8): 087003. doi: 10.1088/1674-1137/38/8/087003
[8]	ZHAO Yu-Ning , LI Wei-Min , WU Cong-Feng , WANG Lin . Analytic modeling of instabilities driven by higher-order modes in the HLS Ⅱ RF system with a higher-harmonic cavity. Chinese Physics C, 2013, 37(8): 087005. doi: 10.1088/1674-1137/37/8/087005
[9]	DAI Jing , LU Xiang-Yang , QUAN Sheng-Wen , ZHANG Bao-Cheng , LIN Lin , HAO Jian-Kui , ZHU Feng , XU Wen-Can , HE Fei-Si , JIN Song , WANG Fang , LIU Ke-Xin , ZHAO Kui . Cold RF test and associated mechanical features correlation of a TESLA-style 9-cell superconducting niobium cavity built in China. Chinese Physics C, 2012, 36(2): 156-159. doi: 10.1088/1674-1137/36/2/010
[10]	LI Xu-Dong , GU Qiang , ZHANG Meng , ZHAO Ming-Hua . The QE numerical simulation of PEAsemiconductor photocathode. Chinese Physics C, 2012, 36(6): 531-537 . doi: 10.1088/1674-1137/36/6/009
[11]	QIU Feng , GAO Jie , LIN Hai-Ying , LIU Rong , MA Xin-Peng , SHA Peng , SUN Yi , WANG Guang-Wei , WANG Qun-Yao , XU Bo . A digital low-level radio-frequency system R&D for a 1.3 GHz nine-cell cavity. Chinese Physics C, 2012, 36(3): 261-266. doi: 10.1088/1674-1137/36/3/013
[12]	YANG Liu , HE Fei-Si , XU Wen-Can , ZHU Feng , LU Xiang-Yang , ZHAO Kui . Tuning for the first 9-cell TESLA cavity of PKU. Chinese Physics C, 2010, 34(4): 496-498. doi: 10.1088/1674-1137/34/4/015
[13]	ZONG Zhan-Guo , GAO Jie , GU Jun , SUN Hong , ZHAO Fa-Cheng , GE Ming-Qi , XU Qing-Jin , ZHAI Ji-Yuan , YUAN Hong , CHEN Jin-Zhe , XIE Wei-Ping , LIU Li-Qiang , ZHANG Liang . Study on the 1.3 GHz low loss shape superconducting cavities at IHEP. Chinese Physics C, 2009, 33(6): 444-449. doi: 10.1088/1674-1137/33/6/008
[14]	MA Qiao-Sheng , WU Yong , FAN Zhi-Kai , GAN Yan-Qing , JIN Xiao , ZHOU Chuan-Ming . Experimental investigation of backward wave oscillator with low magnetic field. Chinese Physics C, 2008, 32(3): 222-226. doi: 10.1088/1674-1137/32/3/013
[15]	XU Wen-Can , QUAN Sheng-Wen , HAO Jian-Kui , JIANG Tao , ZHANG Bao-Cheng , ZHAO Kui . Measurement and Adjustment of Dumb-Bells for 9-cell TESLA Cavity. Chinese Physics C, 2008, 32(S1): 154-156.
[16]	GE Ming-Qi , ZHAO Sheng-Chu , SUN Hong , GAO Jie . Design study on 1.3GHz Mono-cell High Gradient Low Loss Superconducting Cavity. Chinese Physics C, 2006, 30(4): 354-358.
[17]	PAN Wei-Min , SUN Yi , WANG Guang-Wei , Takaaki Furuya , ichi Kurokawa . Studies on Higher Order Modes in BEPCⅡ Superconducting Cavity. Chinese Physics C, 2004, 28(3): 317-320.
[18]	PAN Wei-Min . Higher Order Modes Impedance and Damping Study for the LHC Capture Cavity. Chinese Physics C, 2002, 26(10): 1087-1092.
[19]	Zu Donglin . Concept Design of a New Structure of 1.3GHz Single-Cell Superconducting Cavities. Chinese Physics C, 1997, 21(S1): 491-503.
[20]	Zu Donglin . Concept Design of a New Structure of 1.3GHz Single-Cell Superconducting Cavity. Chinese Physics C, 1996, 20(11): 1041-1052.

Access

Get Citation

ZHENG Hong-Juan, ZHAI Ji-Yuan, ZHAO Tong-Xian and GAO Jie. HOMs simulation and measurement results of IHEP02 cavity[J]. Chinese Physics C, 2015, 39(11): 117006. doi: 10.1088/1674-1137/39/11/117006

ZHENG Hong-Juan, ZHAI Ji-Yuan, ZHAO Tong-Xian and GAO Jie. HOMs simulation and measurement results of IHEP02 cavity[J]. Chinese Physics C, 2015, 39(11): 117006. doi: 10.1088/1674-1137/39/11/117006 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2015-02-04
Revised: 2015-07-07

Fund

Supported by Knowledge Innovation Project of The Chinese Academy of Sciences

Article Metric

Article Views(1610)
PDF Downloads(74)
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

HOMs simulation and measurement results of IHEP02 cavity

Corresponding author: ZHENG Hong-Juan,

1. Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2015-02-04

Accepted Date: 2015-07-07

Available Online: 2015-11-20

Fund Project: Supported by Knowledge Innovation Project of The Chinese Academy of Sciences

Abstract: In accelerator RF cavities, there exists not only the fundamental mode which is used to accelerate the beam, but also higher order modes (HOMs). The higher order modes excited by the beam can seriously affect beam quality, especially for the higher R/Q modes. 1.3 GHz low-loss 9-cell superconducting cavity as a candidate for ILC high gradient cavity, the properties of higher order mode has not been studied carefully. IHEP based on existing low loss cavity, designed and developed a large grain size 1.3 GHz low-loss 9-cell superconducting cavity (IHEP02 cavity). The higher order mode coupler of IHEP02 used TESLA coupler's design. As a result of the limitation of the mechanical design, the distance between higher order mode coupler and end cell is larger than TESLA cavity. This paper reports on measured results of higher order modes in the IHEP02 1.3 GHz low-loss 9-cell superconducting cavity. Using different methods, Q_e of the dangerous modes passbands have been obtained. The results are compared with TESLA cavity results. R/Q of the first three passbands have also been obtained by simulation and compared with the results of the TESLA cavity.

HTML

Reference (10)

HOMs simulation and measurement results of IHEP02 cavity

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article