AI 中文总结
本文以合肥先进光源（HALF）为对象，通过理论分析与宏粒子模拟，探究差共振附近Betatron耦合对高阶模驱动的横向耦合束团不稳定性的影响，证实合适的耦合可有效抑制该不稳定性，为存储环横向稳定性控制提供新方法。
AI 中文摘要
差共振附近的 Betatron 耦合已在多个第四代存储环中得到探索与应用，但其对高阶模（HOM）驱动的横向耦合束团不稳定性的影响尚未得到系统确立。本文以合肥先进光源（HALF）为例，通过理论分析与宏粒子跟踪模拟研究该效应。理论预测在弱、强不稳定性区均与宏粒子跟踪模拟结果吻合良好，验证了所考虑参数范围内的描述有效性。针对 HALF 参数下的垂直高阶模，合适的 Betatron 耦合可有效抑制不稳定性，为横向稳定性控制提供潜在益处。
英文摘要
Betatron coupling near the difference resonance has been explored and adopted in several fourth-generation storage rings, yet its influence on high-order-mode-driven transverse coupled-bunch instabilities has not been systematically established. Using the Hefei Advanced Light Facility (HALF) as an example, we investigate this effect through theoretical analysis and macroparticle tracking simulations. The theoretical predictions agree well with macroparticle tracking simulations in both the weak- and strong-instability regimes, validating the description over the parameter ranges considered. For the vertical HOMs studied with HALF parameters, suitable betatron coupling effectively suppresses the instability, offering potential benefits for transverse stability control.
