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

作　　者：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 R.L.Geng ZHAO Kui 戴劲;鲁向阳;全胜文;张宝澄;林林;郝建奎;朱凤;徐文灿;贺斐思;靳松;王芳;刘克新;R.L.Geng;赵夔(Institute of Heavy Ion Physics,Peking University,Beijing 100871,China;Thomas Jefferson National Accelerator Facility,Newport News,VA 2606,USA)

机构地区：[1]Institute of Heavy Ion Physics,Peking University,Beijing 100871,China [2]Thomas Jefferson National Accelerator Facility,Newport News,VA 2606,USA

出　　处：《Chinese Physics C》2012年第2期156-159,共4页中国物理C（英文版）

基　　金：Supported by Major State Basic Research Development Program of China (973 Program)

摘　　要：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 the RF performance of the cavity is attempted. Correlation between the observed mechanical features andThe 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 the RF performance of the cavity is attempted. Correlation between the observed mechanical features and

关 键 词：superconducting cavity unloaded quality factor field emission 

分 类 号：TL503.2[核科学技术—核技术及应用]