Theoretical study of a dual harmonic system and its application to the CSNS/RCS

Dual harmonic systems have been widely used in high intensity proton synchrotrons to suppress the space charge effect, as well as reduce the beam loss. To investigate the longitudinal beam dynamics in a dual rf system, the potential well, the sub-buckets in the bunch and the multi-solutions of the p...

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Published inChinese physics C Vol. 39; no. 12; pp. 67 - 71
Main Author 苑尧硕 王娜 许守彦 袁月 王生
Format Journal Article
LanguageEnglish
Published 01.12.2015
Subjects
Beams (radiation)
Dynamical systems
Dynamics
Harmonics
Mathematical analysis
Optimization
Space charge
Synchrotrons
射频系统
应用
散裂中子源
束流动力学
束流损失
空间电荷效应
调和
质子同步加速器
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ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/39/12/127002

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Summary:Dual harmonic systems have been widely used in high intensity proton synchrotrons to suppress the space charge effect, as well as reduce the beam loss. To investigate the longitudinal beam dynamics in a dual rf system, the potential well, the sub-buckets in the bunch and the multi-solutions of the phase equation are studied theoretically in this paper. Based on these theoretical studies, optimization of bunching factor and rf voltage waveform are made for the dual harmonic rf system in the upgrade phase of the China Spallation Neutron Source Rapid Cycling Synchrotron （CSNS/RCS）. In the optimization process, the simulation with space charge effect is done using a newly developed code. C-SCSIM.
Bibliography:dual harmonic rf system, longitudinal beam simulation, rf voltage waveform, bunching factor
YUAN Yao-Shuo, WANG Na, XU Shou-Yan, YUAN Yue, WANG Sheng（ Dongguan Branch, Institute of High Energy Physics, Chinese Academy of Sciences, Donggnan 523803, China）
11-5641/O4
Dual harmonic systems have been widely used in high intensity proton synchrotrons to suppress the space charge effect, as well as reduce the beam loss. To investigate the longitudinal beam dynamics in a dual rf system, the potential well, the sub-buckets in the bunch and the multi-solutions of the phase equation are studied theoretically in this paper. Based on these theoretical studies, optimization of bunching factor and rf voltage waveform are made for the dual harmonic rf system in the upgrade phase of the China Spallation Neutron Source Rapid Cycling Synchrotron （CSNS/RCS）. In the optimization process, the simulation with space charge effect is done using a newly developed code. C-SCSIM.
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ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/39/12/127002