Cavity and HOM coupler design for CEPC

Hong-Juan Zheng; Jie Gao; Zhen-Chao Liu

doi:10.1088/1674-1137/40/5/057001

Chinese Physics C> 2016, Vol. 40> Issue(5) : 057001 DOI: 10.1088/1674-1137/40/5/057001

Cavity and HOM coupler design for CEPC

1.
Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

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Abstract：
In this paper we will show a cavity and higher order mode(HOM) coupler designing scheme for the Circular Electron-Positron Collider(CEPC) main ring. The cavity radio frequency(RF) design parameters are shown in this paper. The HOM power is calculated based on the beam parameters in the Preliminary Conceptual Design Report(Pre-CDR). The damping results of the higher order modes(HOMs) and same order modes(SOMs) show that they reach the damping requirements for beam stability.
- CEPC ,
- 650 MHz 5-cell superconducting cavity ,
- HOM coupler ,
- higher order modes ,
- Qe ,
- damping requirements

References

[1]	D. Wang, J. Gao, M Xiao et al. Chin. Phys C, 37(9):097003-097003(2013)
[2]	The CEPC-SPPC Study Group. CEPC-SPPC Preliminary Conceptual Design Report, Volume Ⅱ. IHEP-CEPC-DR-2015-01, IHEP-AC-2015-01, March 2015
[3]	A. Sun, Y. D Joo, H. S. Kang. Journal of the Korean Physical Society, 56(efeq6):2024-2028(2010)
[4]	H Padamsee, J. Konobloch, T. Hays RF Superconductivity for Accelerators Second edition(Strauss GmbH, Mrlenbach Germany:WILEY-VCH Verlag GmbH Co. KGaA, 2008), p.10-19, p.335-339
[5]	F. Marhause JLAB High Current Cryomodule Development, ERL Workshop 2009
[6]	N. Wang, H. J. Zheng, Y. W. Wang et al. Impedance and collective effects of CEPC, 55^th ICFA Advanced Beam Dynamics Workshop on High Luminosity (Beijing:HF2014, 2014)
[7]	T. Galek et al. Traveling Poles Elimination Scheme and Calculations of External Quality Factors of HOMs in SC Cavities, in Proceedings of ICAP2012 edited by Dirk Hecht, Michaela Marx and Volker RW Schaa(Germany:2012) p.152

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Hong-Juan Zheng, Jie Gao and Zhen-Chao Liu. Cavity and HOM coupler design for CEPC[J]. Chinese Physics C, 2016, 40(5): 057001. doi: 10.1088/1674-1137/40/5/057001

Hong-Juan Zheng, Jie Gao and Zhen-Chao Liu. Cavity and HOM coupler design for CEPC[J]. Chinese Physics C, 2016, 40(5): 057001. doi: 10.1088/1674-1137/40/5/057001 shu

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Received: 2015-10-05
Revised: 2015-11-16

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Supported by National Natural Science Foundation of China(11175192)

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沈阳化工大学材料科学与工程学院沈阳 110142