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

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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
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 shu
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Received: 2011-05-27
Revised: 2011-05-24
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Cold RF test and associated mechanical features correlation of a TESLA-style 9-cell superconducting niobium cavity built in China

    Corresponding author: ZHAO Kui,

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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