北京师范大学学报（自然科学版）2026，Vol.62Issue(1)：16-20,5.DOI:10.12202/j.0476-0301.2025166
北京正负电子对撞机二期储存环色品对阻尼时间的影响与分析
Chromaticity effects and analysis on damping time in the Beijing electron-positron collider Ⅱ storage ring
摘要
Abstract
To conduct a quantitative analysis of impact of beam chromaticity on total damping time of Beijing electron-positron collider Ⅱ(BEPC Ⅱ),measurements of corrected chromaticity were taken in lattices with different chromaticities of BEPC Ⅱ at low beam current.Additionally,the damping times of positron and electron rings were measured as a function of beam current in different lattices.The effect of transverse feedback system on damping times of both electron-positron rings was measured.The head-tail damping time was found to be reduced from 46.4 ms to 16.2 ms and 43.8 ms to 12.7 ms,leading to a reduction of total damping time from 11.5 ms to 7.4 ms(reduced about 35.7％)and 12.9 ms to 7.6 ms(reduced about 41.1％),when chromaticity increased from 0.1 to 1.5 and 0.9 to 2.7 in the electron-positron rings,respectively.These experimental data provide a reference for machine optimization in collision mode operations.关键词
电子储存环/同步辐射阻尼/头尾阻尼/阻尼时间/校正色品/横向反馈Key words
electron storage ring/synchrotron radiation damping/head-tail damping/damping time/corrected chromaticity/transverse feedback分类
能源科技引用本文复制引用
耿会平,王娜,邢军,张耀锋..北京正负电子对撞机二期储存环色品对阻尼时间的影响与分析[J].北京师范大学学报（自然科学版）,2026,62(1):16-20,5.基金项目
国家自然科学基金资助项目(12175249) （12175249）
