Factory Acceptance Test Completed for TM020 RF Cavity of Super Tau-Charm Facility
The 500MHz TM020 normal-conducting RF cavity, a key component of the STCF accelerator constructed by Lanzhou Taiji, passed its factory acceptance test on July 28, 2026. This marks a significant milestone in the key technology research project for the Super Tau-Charm Facility (STCF), a new-generation electron-positron collider led by the University of Science and Technology of China. The review meeting brought together experts from the Institute of High Energy Physics of the Chinese Academy of Sciences, Shanghai Advanced Research Institute of the Chinese Academy of Sciences, Chongqing University, Tsinghua University, the University of Science and Technology of China, and Dongsheng Fusion (Shanghai) Technology Co., Ltd. The expert panel conducted a comprehensive and rigorous review of the RF cavity (a 1200mm large-diameter cavity), including its structural design, secondary vacuum brazing, precision machining methods, vacuum performance, and cold test results, and unanimously agreed that all indicators met the design requirements. The measured unloaded quality factor (Q₀) reached 56900 (design value 61500), placing its performance at a leading level among similar high-performance normal-conducting RF cavities in China.
2026-07-31
