Cold RF test and associated mechanical features correlation of a TESLA-style 9-cell superconducting niobium cavity built in China

DAI Jing; LU Xiang-Yang; QUAN Sheng-Wen; ZHANG Bao-Cheng; LIN Lin; HAO Jian-Kui; ZHU Feng; XU Wen-Can; HE Fei-Si; JIN Song; WANG Fang; LIU Ke-Xin; ZHAO Kui

doi:10.1088/1674-1137/36/2/010

Chinese Physics C> 2012, Vol. 36> Issue(2) : 156-159 DOI: 10.1088/1674-1137/36/2/010

Cold RF test and associated mechanical features correlation of a TESLA-style 9-cell superconducting niobium cavity built in China

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The RF performance of a 1.3 GHz 9-cell superconducting niobium cavity was evaluated at cryogenic temperatures following surface processing by using the standard ILC-style recipe. The cavity is a TESLA-style 9-cell superconducting niobium cavity, with complete end group components including a higher order mode coupler, built in China for practical applications. An accelerating gradient of 28.6 MV/m was achieved at an unloaded quality factor of 4×10⁹. The morphological property of mechanical features on the RF surface of this cavity was characterized through optical inspection. Correlation between the observed mechanical features and the RF performance of the cavity is attempted.

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DAI Jing, LU Xiang-Yang, QUAN Sheng-Wen, ZHANG Bao-Cheng, LIN Lin, HAO Jian-Kui, ZHU Feng, XU Wen-Can, HE Fei-Si, JIN Song, WANG Fang, LIU Ke-Xin and ZHAO Kui. Cold RF test and associated mechanical features correlation of a TESLA-style 9-cell superconducting niobium cavity built in China[J]. Chinese Physics C, 2012, 36(2): 156-159. doi: 10.1088/1674-1137/36/2/010

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Received: 2011-05-27
Revised: 2011-05-24

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Cold RF test and associated mechanical features correlation of a TESLA-style 9-cell superconducting niobium cavity built in China

Corresponding author: ZHAO Kui,

Received Date: 2011-05-27

Accepted Date: 2011-05-24

Available Online: 2012-02-05

Abstract: The RF performance of a 1.3 GHz 9-cell superconducting niobium cavity was evaluated at cryogenic temperatures following surface processing by using the standard ILC-style recipe. The cavity is a TESLA-style 9-cell superconducting niobium cavity, with complete end group components including a higher order mode coupler, built in China for practical applications. An accelerating gradient of 28.6 MV/m was achieved at an unloaded quality factor of 4×10⁹. The morphological property of mechanical features on the RF surface of this cavity was characterized through optical inspection. Correlation between the observed mechanical features and the RF performance of the cavity is attempted.

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Cold RF test and associated mechanical features correlation of a TESLA-style 9-cell superconducting niobium cavity built in China

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