束流负载与束团相位补偿

Potential Well Distortion Effects and Bunch Shift Compensation

分析研究了电子储存环上的势阱扰动，分析解给出了各束团同步相移、频移随高次模参数变化的规律．该研究结果可帮助我们优化高频腔的工作模式（通过调节调谐杆的位置来改变高次模的频率）和环上束团的分布，以减小束流负载效应，还可帮助我们利用谐波腔来补偿束团相位的变化．

An analytic treatment of multi-bunch potential well distortion for general bunch distribution case along one storage ring is presented. Resulting simple analytic formulas describe the mode loss and the synchrotron tune shift experienced by a given bunch within the beam, as a function of the resonance frequency. We can know how to modify the existing configuration of parasitic cavity resonance (via frequency tuning) so that the resulting potential well distortion effects are minimized. We can also know how to compensate the bunch shift by using sub-RF cavity.