Electron Cloud Instability Simulation Studies for BEPCⅡ

LIU Yu-Dong; GUO Zhi-Yuan; QIN Qing; WANG Jiu-Qing

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(11) : 1222-1226

Electron Cloud Instability Simulation Studies for BEPCⅡ

Institute of High Energy Physics,CAS,Beijing 100049,China

Abstract
HTML
Reference
Related

PDF

Abstract：
Electron cloud instability (ECI) may take place in a storage ring when the machine is operated with multi-bunch positively charged beam. According to the actual shape of vacuum chamber in BEPCⅡ, a computer simulation program has been developed. With the code, the electron density in the chamber with the different widths of antechamber and the different secondary electron yields, respectively, can be obtained. The possibility to put clearing electrodes in the normal chamber or ante-chamber to reduce the electron density in the central region of the chamber is also investigated. In the simulation, the coherent oscillation of bunches and the formation of electron cloud (EC) are tracked simultaneously. The sideband distribution and growth rate can be obtained through tracking and dealing the bunch oscillation amplitude with FFT. Based on the head-tail model, the single bunch instability induced by EC is also studied. By the simulation, for BEPCⅡ the threshold density for the single bunch instability is estimated to be～10 12 m -3 and the restraining measures that might be adopted in BEPCⅡ can control the EC density under the threshold. According to the simulation results, a relatively big positive chromaticity should be used to suppress the bunch blow up.

References

[1]

. Izawa M et al. Phys. Rev. Lett., 1995, 74, 50442. Fukuma H et al. EPAC2000, 2000, Vienna3. Guo Z Y et al. APAC2004, 2004, Gyeongju4. Ohmi K. Phys. Rev. Lett. 1995, 75: 15265. Furman M A et al. 1997, LBNL-411236. LIU Y D et al. HEP NP, 2004, 28(3): 222(in Chinese)(刘瑜冬等. 高能物理与核物理, 2004, 28(3): 222)7. Bassetti M, Erskine. Report No CERN ISR Th/ 80-06, 19808. Chao A. Physics of Collective Instability in High Energy Accelerators. New York: J. Wiley, 1993

[1]	DAI Zhi-Yong , ZHANG Kai-Zhi , ZHANG Wen-Wei , XIE Yu-Tong . BBU Instability of ``Dragon-I'' LIA. Chinese Physics C, 2008, 32(S1): 289-291.
[2]	WANG Shu-Hong , PEI Guo-Xi , LIU Wei-Bin , CHEN Yan-Wei , YE Qiang , GENG Zhe-Qiao . Studies on the Beam Orbit and Energy Instabilities at the BEPCⅡ Linac. Chinese Physics C, 2007, 31(11): 1067-1070.
[3]	YANG Yu-Feng , ZHU Xiong-Wei . Microbunch Instability in Wigglers. Chinese Physics C, 2007, 31(8): 778-782.
[4]	YANG Yu-Feng , ZHU Xiong-Wei , LI Ming . Microbunch Instability in the Beijing XFEL Test Facility Bunch Compressor. Chinese Physics C, 2007, 31(2): 194-198.
[5]	Alexander W.Chao . Gravitational Instability of a Nonrotating Galaxy. Chinese Physics C, 2006, 30(S1): 6-10.
[6]	LIU Yu-Dong , GUO Zhi-Yuan , Qin Qing , WANG Jiu-Qing , ZHAO Zheng . Transverse Blowup along Bunch Train Caused by Electron Cloud in BEPC. Chinese Physics C, 2006, 30(3): 260-263.
[7]	GUO Zhi-Yuan , LIU Yu-Dong , Qin Qing , WANG Jiu-Qing , XING Jun . The Studies of Electron Cloud Instability in the BEPC. Chinese Physics C, 2006, 30(S1): 102-104.
[8]	YUAN Ren-Xian , YUE Jun-Hui , CAO Jian-She , MA Li . Simulation of BEPCⅡ′s BPM. Chinese Physics C, 2004, 28(6): 664-668.
[9]	ZHAO Zhen-Tang , JIANG Bo-Cheng . Longitudinal Coupled Bunch Instability in Fractionally Filled Storage Rings. Chinese Physics C, 2004, 28(11): 1209-1213.
[10]	LIU Yu-Dong , GUO Zhi-Yuan , WANG Jiu-Qing . Simulation of the Electron Cloud Density in BEPCⅡ. Chinese Physics C, 2004, 28(3): 222-226.
[11]	XIONG Chun , HOU De-Fu . Medium Effects and Thermal Instability in φ₆³ Theory. Chinese Physics C, 2002, 26(8): 753-758.
[12]	LIU Bo , LV Cai-Dian , GUO Hua , HE Ze-Jun . Mechanical and Chemical Instabilities in Nuclear Matter. Chinese Physics C, 2002, 26(10): 1056-1064.
[13]	WANG Shao-Shun , WU Chong . Erraticity of (Pseudo-)Rapidity Gaps. Chinese Physics C, 2001, 25(3): 183-187.
[14]	LUO Yun , ZHANG Chuang , GUO Zhi-Yuan . Study of Ion Induced Instability in BTCF. Chinese Physics C, 2001, 25(5): 437-442.
[15]	LUO Yun , GUO Zhi-Yuan , ZHANG Chuang . Analysis of an Ion Induced Coupled Bunch Instability in BEPC. Chinese Physics C, 2001, 25(3): 258-263.
[16]	GUO Zhi-Yuan , QIN Qing , ZHANG Chuang , MA Li . Study on Beam Photoelectron Instability in BEPC. Chinese Physics C, 2001, 25(3): 251-257.
[17]	WANG ShaoShun , WU Chong . Erraticity Analysis of Multiparticle Production in pp Collisions at 400GeV/c. Chinese Physics C, 2000, 24(4): 285-289.
[18]	WANG LanFa , ZHANG Chuang , WANG ShuHong , GUO ZhiYuan . Study on Longitudinal Coupled Bunch Instability with Unequal Spaced Distribution. Chinese Physics C, 2000, 24(8): 761-766.
[19]	LI YongJun , JIN YuMing , LI WeiMin , SUN BaoGen , YIN LiXin , LIU ZuPing , DIAO CaoZheng , LIU GongFa , ZHOU AnQi , LI JingYi , YU XiangKun , HE XiaoYe . Simulation of Ion-trapping Instability and Beam Shaking in an Electron Storage Ring. Chinese Physics C, 2000, 24(9): 864-869.
[20]	Wang Lanfa , Zhang Chuang , Wang Shuhong , Guo Zhiyuan , Lin Yuzheng , Tong Dechun . Simulation of Coupled Bunch Instability. Chinese Physics C, 1998, 22(12): 1174-1181.

Access

Get Citation

LIU Yu-Dong, GUO Zhi-Yuan, QIN Qing and WANG Jiu-Qing. Electron Cloud Instability Simulation Studies for BEPCⅡ[J]. Chinese Physics C, 2004, 28(11): 1222-1226.

LIU Yu-Dong, GUO Zhi-Yuan, QIN Qing and WANG Jiu-Qing. Electron Cloud Instability Simulation Studies for BEPCⅡ[J]. Chinese Physics C, 2004, 28(11): 1222-1226. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2004-04-26
Revised: 1900-01-01

Article Metric

Article Views(2915)
PDF Downloads(539)
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

Electron Cloud Instability Simulation Studies for BEPCⅡ

Corresponding author: LIU Yu-Dong,

Institute of High Energy Physics,CAS,Beijing 100049,China

Received Date: 2004-04-26
Accepted Date: 1900-01-01
Available Online: 2004-11-05

Abstract: Electron cloud instability (ECI) may take place in a storage ring when the machine is operated with multi-bunch positively charged beam. According to the actual shape of vacuum chamber in BEPCⅡ, a computer simulation program has been developed. With the code, the electron density in the chamber with the different widths of antechamber and the different secondary electron yields, respectively, can be obtained. The possibility to put clearing electrodes in the normal chamber or ante-chamber to reduce the electron density in the central region of the chamber is also investigated. In the simulation, the coherent oscillation of bunches and the formation of electron cloud (EC) are tracked simultaneously. The sideband distribution and growth rate can be obtained through tracking and dealing the bunch oscillation amplitude with FFT. Based on the head-tail model, the single bunch instability induced by EC is also studied. By the simulation, for BEPCⅡ the threshold density for the single bunch instability is estimated to be～10 12 m -3 and the restraining measures that might be adopted in BEPCⅡ can control the EC density under the threshold. According to the simulation results, a relatively big positive chromaticity should be used to suppress the bunch blow up.