瓦里安CLINAC-Ⅸ型直线加速器联锁UDRS原理及不常见故障处理

UDRS联锁是瓦里安高能直线加速器的常见剂量联锁，由于系统的复杂性，该故障的出现几乎一直困扰很多工程师，需要找出解决的方法。本文详细分析了瓦里安CLinac-Ⅸ型直线加速器电路构成和UDRS联锁发生的原理，总结出UDRS联锁故障的检修方法。通过对少见故障处理方法的分享，为解决类似机型出现UDRS故障时提供方法参考。

Principle and troubleshooting for the irregular case of UDRS interlock for Varian CLINAC-IX linear accelerator

The UDRS interlocking fault is a common dose interlocking of Varian high-energy linear accelerator. Due to the complexity of the system, this fault has brought challenges to the engineers for a long time. Hence, an effective solution is urgently required. In this article, the circuit and principle for UFRS interlocking fault for Varian CLINAC-IX linear accelerator were explicitly analyzed and the maintenance methods were summarized. The management methods of such rare fault were shared, aiming to provide reference for subsequent management of similar interlocking faults.