Studies on Higher Order Modes in BEPCⅡ Superconducting Cavity

PAN Wei-Min; SUN Yi; WANG Guang-Wei; Takaaki Furuya; ichi Kurokawa

近期发现有不法分子冒充我刊与作者联系，借此进行欺诈等不法行为，请广大作者加以鉴别，如遇诈骗行为，请第一时间与我刊编辑部联系确认（《中国物理C》（英文）编辑部电话：010-88235947,010-88236950），并作报警处理。

本刊再次郑重声明：

（1）本刊官方网址为cpc.ihep.ac.cn和https://iopscience.iop.org/journal/1674-1137

（2）本刊采编系统作者中心是投稿的唯一路径，该系统为ScholarOne远程稿件采编系统，仅在本刊投稿网网址（https://mc03.manuscriptcentral.com/cpc）设有登录入口。本刊不接受其他方式的投稿，如打印稿投稿、E-mail信箱投稿等，若以此种方式接收投稿均为假冒。

（3）所有投稿均需经过严格的同行评议、编辑加工后方可发表，本刊不存在所谓的“编辑部内部征稿”。如果有人以“编辑部内部人员”名义帮助作者发稿，并收取发表费用，均为假冒。

《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 2004, Vol. 28> Issue(3) : 317-320

Studies on Higher Order Modes in BEPCⅡ Superconducting Cavity

Institute of High Energy Physics,CAS,Beijing 100039,China2 High Energy Accelerator Research Organization KEK,1-1 Oho,Tsukuba-shi,Ibaraki-ken,305-0801,Japan

Abstract
HTML
Reference
Related

PDF

Abstract：
To investigate the higher order mode (HOM) damping in the BEPCⅡ superconducting cavity (SC) when using HOM absorbers, simulations have been done for changing the position and the length as well as the thickness of ferrite of HOM damper, and for different positions and angles of taper. The optimized values under which the HOM impedance of the BEPCⅡ SC cavity will be trapped in the impedance threshold of the BEPCⅡ collider have been found. For verifying the simulation result mentioned above, HOM measurements on the BEPCⅡ model cavity have been made, and the satisfied results for HOM damping are obtained. The distribution and magnitude of some potentially dangerous higher order modes have been found, which are basically consistent with the simulations.

References

[1]

. Takaaki Furuya. Superconducting Cavity, Physics and Engineering of High Performance Electron Storage Rings and Application of Supercon-duct ing Technology. Proceedings of the Asian Accelerat or School, 19992. Impedance and Collective Effects, BEPCⅡDesign report, IHEP..AC-Report/2002- 01, May 20023. CLANS Manual,Private Communication

[1]	SUN Yi , WANG Guang-Wei , PAN Wei-Min , LI Zhong-Quan , HUANG Hong , MA Qiang , LIN Hai-Ying , XU Bo , WANG Qun-Yao , LI Shao-Peng , HE Kun , LIU Ya-Ping . First Superconducting RF System Commissioning for BEPCⅡ in China. Chinese Physics C, 2008, 32(S1): 191-193.
[2]	PAN Wei-Min , WANG Guang-Wei , . Calculation of the External Quality Factor of the High Power Input Coupler for the BEPCII Superconducting Cavity. Chinese Physics C, 2008, 32(1): 72-74. doi: 10.1088/1674-1137/32/1/016
[3]	BIAN Lin , LI Shao-Peng , LIU Ya-Ping . Measurements of Static Heat Loss and Unloaded Q₀ on the BEPCⅡ SRF Cavities. Chinese Physics C, 2008, 32(S1): 166-168.
[4]	CHEN Fu-San , CHENG Jian . Logic of Quench Protection Assembly for BEPC-ⅡInteraction Region Superconducting Magnet. Chinese Physics C, 2006, 30(4): 349-353.
[5]	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.
[6]	ZHONG Juan , PAN Wei-Min . Study on the Performance of the Input Coupler for the BEPCⅡ Superconducting RF Cavity. Chinese Physics C, 2006, 30(10): 1014-1017.
[7]	HAO Jian-Kui , ZHAO Kui , ZHU Feng . Researches on Bake Effect on RF Superconducting Cavities. Chinese Physics C, 2005, 29(9): 918-922.
[8]	WANG Gui-Mei , WU Wen-Zong , Xiangyang LU , ZHANG Bao-Cheng , QUAN Sheng-Wen , ZHU Feng , LIN LIN , JIAO Fei , ZHAO Kui . Study on HOMs in 1+1/2 Cell Superconducting Cavity. Chinese Physics C, 2005, 29(11): 1077-1080.
[9]	YUAN Ren-Xian , YUE Jun-Hui , CAO Jian-She , MA Li . Simulation of BEPCⅡ′s BPM. Chinese Physics C, 2004, 28(6): 664-668.
[10]	PEI Shi-Lun , WANG Shu-Hong , GU Peng-Da , LIU Bo . Optimization Studies on BEPCⅡ Future Pre-injector with Two SHBs. Chinese Physics C, 2004, 28(5): 549-554.
[11]	XU Zhong-Xiong , WANG Fang-An , QI Xin . Experimental Studies on Sub-Harmonic Suppression of Magnet Power Supply. Chinese Physics C, 2003, 27(7): 637-640.
[12]	WANG Shu-Hong , GU Peng-Da , WANG Jiu-Qing , LIU Yu-Cheng , PEI Guo-Xi , PEI Shi-Lun , ZHOU Zu-Sheng , LIU Wei-Bin . Studies on Optimizing Beam Optics and Orbit Correction for BEPCⅡ-Linac. Chinese Physics C, 2003, 27(2): 173-177.
[13]	LI Zhong-Quan , ZHANG Chuang . Study of Heavily Damped SC RF Cavity. Chinese Physics C, 2003, 27(10): 919-925.
[14]	LIN Zhi-Gang , ZHOU Lin , CHEN Huai-Bi , ZHAO Zhen-Tang . Suppression of HOM's on a Prototype Superconducting Cavity by Absorbers. Chinese Physics C, 2003, 27(8): 735-738.
[15]	PAN Wei-Min . Higher Order Modes Impedance and Damping Study for the LHC Capture Cavity. Chinese Physics C, 2002, 26(10): 1087-1092.
[16]	DAI Jian-Ping , CHAI Xue-Dong , ZHAO Zhen-Tang . Shunt Impedance and Power of the BEPC DC Separator. Chinese Physics C, 2001, 25(7): 680-683.
[17]	Zhao Zhentang . HOMs Power Generated by Unequany Spaced and Populated Bunches in Storage Ring. Chinese Physics C, 1999, 23(9): 914-921.
[18]	Zhou Feng . Study of BEPC Impedance. Chinese Physics C, 1998, 22(8): 739-744.
[19]	Zu Donglin , Chen jiaer . Study on SRF Multicell Accelerating Cavity for Linear Collider and Trapped Modes. Chinese Physics C, 1997, 21(2): 180-186.
[20]	PEI Guo-Xi , XIE Jia-Lin , ZHOU Shu , SUN Song-Lan . OPTIMIZATION OF BEPC POSITRON SOURCE. Chinese Physics C, 1990, 14(2): 110-117.

Access

Get Citation

PAN Wei-Min, SUN Yi, WANG Guang-Wei, Takaaki Furuya and ichi Kurokawa. Studies on Higher Order Modes in BEPCⅡ Superconducting Cavity[J]. Chinese Physics C, 2004, 28(3): 317-320.

PAN Wei-Min, SUN Yi, WANG Guang-Wei, Takaaki Furuya and ichi Kurokawa. Studies on Higher Order Modes in BEPCⅡ Superconducting Cavity[J]. Chinese Physics C, 2004, 28(3): 317-320. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2003-08-11
Revised: 1900-01-01

Article Metric

Article Views(3975)
PDF Downloads(565)
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

Studies on Higher Order Modes in BEPCⅡ Superconducting Cavity

Corresponding author: PAN Wei-Min,

Institute of High Energy Physics,CAS,Beijing 100039,China2 High Energy Accelerator Research Organization KEK,1-1 Oho,Tsukuba-shi,Ibaraki-ken,305-0801,Japan

Received Date: 2003-08-11
Accepted Date: 1900-01-01
Available Online: 2004-03-05

Abstract: To investigate the higher order mode (HOM) damping in the BEPCⅡ superconducting cavity (SC) when using HOM absorbers, simulations have been done for changing the position and the length as well as the thickness of ferrite of HOM damper, and for different positions and angles of taper. The optimized values under which the HOM impedance of the BEPCⅡ SC cavity will be trapped in the impedance threshold of the BEPCⅡ collider have been found. For verifying the simulation result mentioned above, HOM measurements on the BEPCⅡ model cavity have been made, and the satisfied results for HOM damping are obtained. The distribution and magnitude of some potentially dangerous higher order modes have been found, which are basically consistent with the simulations.