医科达直线加速器真空部件常见故障及快速解决方案

电子的运输离不开真空环境。医科达直线加速器真空系统的维持依赖于枪端和靶端的两个溅射式离子泵。由于其行波加速特性,以及可拆卸电子枪灯丝设计,导致真空稳定性相对稍弱。整个系统仅通过两个真空值来体现其运行状态,存在出现某些故障但并不触发联锁情况。鉴于真空系统的复杂性,特对真空系统中各部件故障时引起真空问题进行分析,为同行提供一些快速解决真空故障、迅速重建真空的方案和建议。

Common Troubles of Vacuum Components in Elekta Linear Accelerator and Fast Solutions

The transportation of electron is inseparable from vacuum environment.The maintenance of the vacuum system of Elekta linear accelerator depends on two sputtering ionic pumps at the gun end and the target end.The traveling wave acceleration were used in Elekta linear accelerators.And the design of the electron gun filament is detachable.Because of these two reasons,the vacuum stability is relatively weak.Only two vacuum values are used to reflect the operation state of the whole vacuum system,which causes a few failures but will not trigger a the machine interlock.Considering the complexity of whole vacuum system,the problem of vacuum caused by the failure of various components in vacuum system is analyzed in this paper.It is hoped that some useful repairing experience and suggestions for the maintenance engineers of linear accelerator to solve the vacuum fault and rebuild the vacuum can be provided quickly.