Analysis of an Ion Induced Coupled Bunch Instability in BEPC

LUO Yun; GUO Zhi-Yuan; ZHANG Chuang

Chinese Physics C> 2001, Vol. 25> Issue(3) : 258-263

Analysis of an Ion Induced Coupled Bunch Instability in BEPC

Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 100039, China

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Abstract：
An ion induced coupled-bunch instability observed in the Beijing Electron-Positron Collider (BEPC) is analyzed in the paper, with the given side-band of the instability. A linear two-beam theory of ion trapping is applied to calculate the threshold current and growth time of the instability. A simulation program based on the strong weak model is developed to track the interaction process between the beam and the ion cloud. The simulation results successfully reproduce the side-band and give a reasonable growth time of the instability.

References

[1]

. GUO Z Y et al. Recent Studies of Bean Photoelectron Instability in BEPC , PAC’99, NewYork, 1999 2. CHAO A W. Physics of Collective Beam Instabilities in High Energy Accelerator. New York :Wiley Interscience Publication. 1993. 203— 211 3. Bocchetta C. Life time and Beam Quality. In: Turner S ed. CERN 98—04. 1999. 272—2784. Ohmi K. Phys. Rev.,1997, E55:7750

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LUO Yun, GUO Zhi-Yuan and ZHANG Chuang. Analysis of an Ion Induced Coupled Bunch Instability in BEPC[J]. Chinese Physics C, 2001, 25(3): 258-263.

LUO Yun, GUO Zhi-Yuan and ZHANG Chuang. Analysis of an Ion Induced Coupled Bunch Instability in BEPC[J]. Chinese Physics C, 2001, 25(3): 258-263. shu

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Received: 2000-01-30
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Analysis of an Ion Induced Coupled Bunch Instability in BEPC

Corresponding author: LUO Yun,

Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 100039, China

Received Date: 2000-01-30
Accepted Date: 1900-01-01
Available Online: 2001-03-05

Abstract: An ion induced coupled-bunch instability observed in the Beijing Electron-Positron Collider (BEPC) is analyzed in the paper, with the given side-band of the instability. A linear two-beam theory of ion trapping is applied to calculate the threshold current and growth time of the instability. A simulation program based on the strong weak model is developed to track the interaction process between the beam and the ion cloud. The simulation results successfully reproduce the side-band and give a reasonable growth time of the instability.