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

YUAN Yao-Shuo; WANG Na; XU Shou-Yan; YUAN Yue; WANG Sheng

doi:10.1088/1674-1137/39/12/127002

Chinese Physics C> 2015, Vol. 39> Issue(12) : 127002 DOI: 10.1088/1674-1137/39/12/127002

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

1.
Dongguan Branch, Institute of High Energy Physics, Chinese Academy of Sciences, Dongguan 523803, China

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Abstract：
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.
- dual harmonic rf system ,
- longitudinal beam simulation ,
- rf voltage waveform ,
- bunching factor

References

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YUAN Yao-Shuo, WANG Na, XU Shou-Yan, YUAN Yue and WANG Sheng. Theoretical study of a dual harmonic system and its application to the CSNS/RCS[J]. Chinese Physics C, 2015, 39(12): 127002. doi: 10.1088/1674-1137/39/12/127002

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Received: 2015-03-31
Revised: 2015-05-21

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Supported by National Natural Science Foundation of China (11175193)

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: WANG Sheng,

1. Dongguan Branch, Institute of High Energy Physics, Chinese Academy of Sciences, Dongguan 523803, China

Received Date: 2015-03-31
Accepted Date: 2015-05-21
Available Online: 2015-12-20

Fund Project: Supported by National Natural Science Foundation of China (11175193)

Abstract: 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.