Preliminary study of residual orbit oscillation in BEPCⅡ

MA Hui-Zhou; XU Gang; LEI Ge; CAO Jian-She; MA Li; ZHANG Lei; YUE Jun-Hui; SUI Yan-Feng

doi:10.1088/1674-1137/32/10/017

Chinese Physics C> 2008, Vol. 32> Issue(10) : 849-851 DOI: 10.1088/1674-1137/32/10/017

Preliminary study of residual orbit oscillation in BEPCⅡ

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Abstract：
BEPCII has two rings each with an injection system. The injection system of each ring consists of two kicker magnets and a septum magnet. The injection layout of two rings is the same. Both two kickers would kick the beam in horizontal plane. The betatron phase advance in the horizontal plane between two kickers is designed exactly 180° in order to reduce the perturbation to the circulating beams during injection. In fact, the residual orbit oscillation will originate because of the existence of a variety of errors. The Librea Electron BPM processor is used to acquire the beam position data in turn-by-turn mode and to analyze the residual orbit oscillation. According to the measurement results, minimization of the residual orbit oscillation can be done by adjusting the peak field strength and trigger timing delay of two kickers. With very small residual orbit oscillation the two beams can keep collision condition during the injection.

References

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. ZHAO Ji-Jiu, YIN Zhao-Sheng et al. Particle AcceleratorTechnology, Beijing: Higher Education Press, 2006. 286-293. (in Chinese)2. Kosicek A. Libera Electron Beam Position Processor.Proceedings of 2005 Particle Accelerator Conference.Knoxville, Tennessee. 2005, 5, 4284-42863. ZHAO Ji-Jiu et al. BEPCп Control System. HEP NP,2006, 30(11): 1100-1106 (in Chinese)4. ZHANG Lei et al. The Design of BEPCII Bunch Current Monitor System. Chin. Phys. C (HEP NP), 2008, 32(3):218-221

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MA Hui-Zhou, XU Gang, LEI Ge, CAO Jian-She, MA Li, ZHANG Lei, YUE Jun-Hui and SUI Yan-Feng. Preliminary study of residual orbit oscillation in BEPCⅡ[J]. Chinese Physics C, 2008, 32(10): 849-851. doi: 10.1088/1674-1137/32/10/017

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Received: 2008-01-04
Revised: 2008-02-17

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Preliminary study of residual orbit oscillation in BEPCⅡ

Corresponding author: MA Hui-Zhou,

Received Date: 2008-01-04

Accepted Date: 2008-02-17

Available Online: 2008-10-05

Abstract:

BEPCII has two rings each with an injection system. The injection system of each ring consists of two kicker magnets and a septum magnet. The injection layout of two rings is the same. Both two kickers would kick the beam in horizontal plane. The betatron phase advance in the horizontal plane between two kickers is designed exactly 180° in order to reduce the perturbation to the circulating beams during injection. In fact, the residual orbit oscillation will originate because of the existence of a variety of errors. The Librea Electron BPM processor is used to acquire the beam position data in turn-by-turn mode and to analyze the residual orbit oscillation. According to the measurement results, minimization of the residual orbit oscillation can be done by adjusting the peak field strength and trigger timing delay of two kickers. With very small residual orbit oscillation the two beams can keep collision condition during the injection.

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Preliminary study of residual orbit oscillation in BEPCⅡ

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通讯作者: 陈斌, bchen63@163.com

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