一种直线加速器电离室保护装置的研制

摘要

目的:为了减少因电离室工作温度、湿度变化引起的直线加速器故障,延长直线加速器电离室使用寿命,设计一种电离室保护装置.方法:通过使用温度23℃、湿度15%、流量10L/min的干燥空气吹拂电离室的方法,改变电离室的工作环境,减少外部应用环境的变化对电离室产生的不良影响.结果:将装置安装在2台直线加速器上使用,同比上年同期的故障次数,故障率减少80%以上.结论:通过实际运行及参数检测,该电离室保护装置运行稳定,在一定程度上改善了电离室的工作环境,可以减少外部应用环境的变化对电离室产生的不良影响,减少电离室故障,延长使用寿命.%Objective: To design a protection device on ionization chamber to reduce the failure of linear accelerator that caused by changes in ionization chamber's temperature and humidity, and extend the service life of ionization chamber. Methods: The working environment of ionization chamber was changed by using the temperature 23 ℃ , humidity 15％, flow 10 l/min dry air blowing chamber, reducing the adverse effect of the ionization chamber by external environment changes. Results: This device was installed on two linear accelerator equipments. Number of failures compared the same period last year reduced by 80％ at least. Conclusion: By the actual operation, the ionization chamber protection device is stable and can be used to improve the working environment of the ionization chamber and reduce the adverse environmental impacts, reduce failures and extend life.