利用逐束团测量系统在BEPC储存环中跟踪单个束团得到其多圈位置振荡信息,获得BEPC储存环的横向阻尼时间与束流流强、色品、八极子和束流能量的关系,并通过分析得到了BEPC储存环辐射阻尼时间为52 ms。实验结果表明:流强越高、色品越大,阻尼率也就越大;束流流强为4.7 mA时八极子强度的变化对阻尼率没有影响;束流流强为5 mA时,阻尼率随束流能量升高而减小。 Using the bunch-by-bunch measurement system to track a single bunch in the BEPC storage ring, the multi-loop position oscillation information is obtained, and the relationship between the lateral damping time of BEPC storage ring and the beam current, chromaticity, octopole and beam energy is obtained. The radiation damping time of the BEPC storage ring is obtained by analysis of 52 ms. The experimental results show that the higher the flow intensity is, the larger the chromaticity is and the larger the damping rate is. When the beam current is 4.7 mA, the change of the octopole intensity has no effect on the damping rate. When the beam intensity is 5 mA, The damping rate decreases as the beam energy increases.