Design of a higher harmonic cavity for the SSRF storage ring

MA Guang-Ming; ZHAO Zhen-Tang; LIU Jian-Fei

doi:10.1088/1674-1137/32/4/007

Chinese Physics C> 2008, Vol. 32> Issue(4) : 275-279 DOI: 10.1088/1674-1137/32/4/007

Design of a higher harmonic cavity for the SSRF storage ring

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Abstract：
Higher harmonic cavity used in the third generation synchrotron light source increases the Touschek lifetime. The higher harmonic cavity of Shanghai Synchrotron Radiation Facility (SSRF) is a 1.5GHz passive superconducting cavity. Its higher order modes (HOM) are extracted by a ferrite HOM damper out of the cryostat. Multi-cell cavity is chosen concerning the voltage. The harmonic cavity dynamics, beam dynamics with passive harmonic cavity and the design of single cell cavity are included in this paper.

References

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. Byrd J M, Georgsson M. Physical Review Special Topics-Accelerators and Beams, 2001, 4: 0307012. Penco G, Svandrlik M. Physical Review Special Topics-Accelerator and Beams, 2006, 9: 0444013. Hofmann A, Myers S. Beam Dynamics in a Double RF System. In: CERN, Proceedings of the 11th International Conference on High Energy Accelerator. Geneva: CERN,1980. 610-6144. Marchand P. Possible Upgrade of the SLS RF System for Improving the Beam Lifetime. In: Proceedings of the Particle Accelerator Conference. USA: New York, 1999. 989-9915. Pedrozzi M et al. First Operation Results of the 3rd Harmonic Super Conducting Cavities in SLS and ELETTRA.In: Proceedings of the Particle Accelerator Conference.USA: Portland, 2003. 878-8806. Penco G et al. First Year of Operation of SUPER-3HC at ELETTRA. In: Proceedings of the European Particle Accelerator Conference. Switzerland: Lucerne, 2004. 1009-10117. Craievich P et al. HOM Couplers Design for the SUPER-3HC Cavity. In: Proceedings of the Particle Accelerator Conference. USA: Chicago, 2001. 1134-11368. Umemori K. Higher-Order-Mode Damping of L-band Superconducting Cavity Using a Radial-Line HOM Damper.In: Proceedings of the Particle Accelerator Conference.USA: Knoxville, 2005. 3606-36089. Sekutowicz J et al. Cavities for JLAB's 12 GeV Upgrade.In: Proceedings of the Particle Accelerator Conference.USA: Portland, 2003. 1395-1397

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MA Guang-Ming, ZHAO Zhen-Tang and LIU Jian-Fei. Design of a higher harmonic cavity for the SSRF storage ring[J]. Chinese Physics C, 2008, 32(4): 275-279. doi: 10.1088/1674-1137/32/4/007

MA Guang-Ming, ZHAO Zhen-Tang and LIU Jian-Fei. Design of a higher harmonic cavity for the SSRF storage ring[J]. Chinese Physics C, 2008, 32(4): 275-279. doi: 10.1088/1674-1137/32/4/007 shu

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Received: 2007-06-06
Revised: 2007-07-04

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沈阳化工大学材料科学与工程学院沈阳 110142

Design of a higher harmonic cavity for the SSRF storage ring

Corresponding author: ZHAO Zhen-Tang,

Received Date: 2007-06-06
Accepted Date: 2007-07-04
Available Online: 2008-04-05

Abstract:

Higher harmonic cavity used in the third generation synchrotron light source increases the Touschek lifetime. The higher harmonic cavity of Shanghai Synchrotron Radiation Facility (SSRF) is a 1.5GHz passive superconducting cavity. Its higher order modes (HOM) are extracted by a ferrite HOM damper out of the cryostat. Multi-cell cavity is chosen concerning the voltage. The harmonic cavity dynamics, beam dynamics with passive harmonic cavity and the design of single cell cavity are included in this paper.