Stop band characteristics of a TESLA cavity coaxial-type HOM coupler

WANG Er-Dong; WANG Fang; ZHANG Bao-Cheng; ZHAO Kui

doi:10.1088/1674-1137/33/5/017

Chinese Physics C> 2009, Vol. 33> Issue(5) : 401-405 DOI: 10.1088/1674-1137/33/5/017

Stop band characteristics of a TESLA cavity coaxial-type HOM coupler

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Abstract：
A TTF-type coaxial higher order modes (HOM) coupler has been used in a TESLA 9 cell cavity. It is impossible to measure the stop band characteristics of the HOM coupler with the cavity. A measurement device for the coaxial transmission line type for the HOM coupler has been designed at Peking University. Experimentally it was shown that the average voltage standing wave ratio of the coaxial transmission line is smaller than 1.08. The experimental results of the stop band characteristics of the TTF-type HOM coupler have been fitted for the simulation. This paper describes the design of the measurement device and discusses the experimental and simulation results of stop band characteristics of the HOM coupler.

References

[1]

. Panofsky W K H, Bander M. Rev. Sci. Instrum., 1968, 39:2062. Padamsee H, Knobloch J, Hags T. RF Superconductivity for Accelerators. New York: John Wiley Sons, Inc., 1998.355-3803. Sekutowics J. Higher Order Mode Coupler for TESLA. Pro-ceedings of 6th Workshop on SRF. Virginia, USA, 19934. Aune B. Superconducting TESLA Cavities PR ST, 2000,3: 0920015. Kai Chang. Encyclopedia of RF and Microwave Engineer-ing Wiley-Interscience. New York: John Wiley Sons, Inc.,2005, 660-6636. WANG Gui-Mei, WU Wen-Zhong, LU Xiang-Yang et al.HEP NP, 2006, 30(3): 242-245 (in Chinese)

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WANG Er-Dong, WANG Fang, ZHANG Bao-Cheng, ZHAO Kui, Stop band characteristics of a TESLA cavity coaxial-type HOM coupler[J]. Chinese Physics C, 2009, 33(5): 401-405. doi: 10.1088/1674-1137/33/5/017

WANG Er-Dong, WANG Fang, ZHANG Bao-Cheng, ZHAO Kui, Stop band characteristics of a TESLA cavity coaxial-type HOM coupler[J]. Chinese Physics C, 2009, 33(5): 401-405. doi: 10.1088/1674-1137/33/5/017 shu

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Received: 2008-06-19
Revised: 2008-10-06

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通讯作者: 陈斌, [email protected]

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沈阳化工大学材料科学与工程学院沈阳 110142

Stop band characteristics of a TESLA cavity coaxial-type HOM coupler

Corresponding author: WANG Fang,

Received Date: 2008-06-19

Accepted Date: 2008-10-06

Available Online: 2009-05-05

Abstract:

A TTF-type coaxial higher order modes (HOM) coupler has been used in a TESLA 9 cell cavity. It is impossible to measure the stop band characteristics of the HOM coupler with the cavity. A measurement device for the coaxial transmission line type for the HOM coupler has been designed at Peking University. Experimentally it was shown that the average voltage standing wave ratio of the coaxial transmission line is smaller than 1.08. The experimental results of the stop band characteristics of the TTF-type HOM coupler have been fitted for the simulation. This paper describes the design of the measurement device and discusses the experimental and simulation results of stop band characteristics of the HOM coupler.

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Stop band characteristics of a TESLA cavity coaxial-type HOM coupler

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通讯作者: 陈斌, [email protected]

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