Studies on high order mode of bell-shaped prototype cavities

MA Guang-Ming; ZHAO Zhen-Tang

doi:10.1088/1674-1137/32/12/014

Chinese Physics C> 2008, Vol. 32> Issue(12) : 1012-1015 DOI: 10.1088/1674-1137/32/12/014

Studies on high order mode of bell-shaped prototype cavities

MA Guang-Ming ,
ZHAO Zhen-Tang ^,

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Abstract：
Aluminium and copper prototype cavities were designed to study higher order modes (HOM). An automatic field mapping system was developed with LabVIEW to measure the radiofrequency (RF) characteristics, such as resonant frequency, Q-value, shunt impedance and electromagnetic field distribution of the higher-order modes in a model RF cavity. Two kinds of the bell-shaped cavities were measured using the field mapping system, their frequencies are 1.5GHz and 800~MHz respectively. The fields' distributions of the monopole modes and dipole modes, as well the R/Q values, were measured.

References

[1]

. MA G, ZHAO Z, LIU J. Chinese Physics C, 2008, 32(4):2752. TAO X K, CHEN H B, TONG D C. Study of HOM Couplers on an 800 MHz Prototype Cavity. In: Proceedings of the Asian Particle Accelerator Conference. Beijing, China,2001, 746-7483. LIANG Y Z. Research on HOM Coupler for Higher Harmonic Cavity. Master thesis, at Engineering Physics Department, Beijing: Tsinghua University, 20034. Maier L C, Jr., Slater J C. Journal of Applied Physics,1952, 23: 685. XIAO L, LIANG Y Z, TONG D et al. NIM A, 2001, 463:86-936. Padamsee, Barnes P et al. Particle Accelerators, 1992, 40:17

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MA Guang-Ming and ZHAO Zhen-Tang. Studies on high order mode of bell-shaped prototype cavities[J]. Chinese Physics C, 2008, 32(12): 1012-1015. doi: 10.1088/1674-1137/32/12/014

MA Guang-Ming and ZHAO Zhen-Tang. Studies on high order mode of bell-shaped prototype cavities[J]. Chinese Physics C, 2008, 32(12): 1012-1015. doi: 10.1088/1674-1137/32/12/014 shu

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Received: 2008-03-10
Revised: 2008-04-10

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