BEPC中束束效应的计算模拟

独立开发并行的正负电子储存环的束束效应模拟程序SBBE?.通过求解自由空间内的Poisson方程计算束束作用力;单圈的传输映射中引入了辐射阻尼效应和随机效应.使用它对BEPC中的束束效应进行了计算模拟,并与实测数据进行比较.结果表明,SBBE可以较好地再现BEPC中由束束效应所引发的现象,具备一定的预言能力.本工作为BEPCⅡ的束束效应模拟研究.

Simulation of Beam-Beam Effects in BEPC

A parallel self-consistent code SBBE to simulate the beam-beam effects in e +e - storage ring has been developed. It calculates the transverse kick in a collision by directly solving the Possion equation with an open boundary. Radiation damping effect and excitation random effect are included in arc transport. By using this code,the simulation of beam beam interaction on BEPC was made,and the simulated result was compared to the experiment result. The simulated luminosity agrees to the measured one qualitatively. The beam-beam limit was calculated in simulation and agreed well with the measured one.