论文部分内容阅读
对在北京正负电子对撞机 (BEPC)上观测到的由离子引起的电子束二极耦合束团不稳定性的实验数据作了分析处理 ,给出了这种二极耦合束团不稳定性的边带 .首先用离子俘获的线性两束流理论定量计算了离子引起的二极耦合束团不稳定性发生的阈值束流流强和不稳定性的增长时间 ,然后用基于束流 -离子强弱作用模型的模拟程序跟踪了在实验情况下束流与离子的相互作用过程 ,跟踪结果成功地再现了离子引起的二极耦合束团不稳定性边带 ,并给出了比较合理的不稳定性增长时间
The experimental data on the instability of the electron-beam-coupled bunch caused by ions observed at Beijing Electron-Positron Collider (BEPC) have been analyzed and treated. The instability of the two-pole coupling bunch In the first step, the linear two-beam ion trap theory is used to quantitatively calculate the threshold flow strength and the instability growth time of the ion-induced instability of the two coupled beams. Then, The simulation program of the ion strength and weakness model traces the interaction between the ion beam and the ion beam under the experimental conditions. The tracking results successfully reproduce the ion-induced unstable sidebands of the diode-coupled bunch and give a more reasonable Instability increases time