BJ-6B加速器新购闸流管的调试  

Adjustment of the New Thyratron in BJ-6B Accelerator

作　　者：李贤富[1] 谭榜宪[1] 柳弥[1] 谢力[1] 周进伟[1] 

机构地区：[1]医学影像四川省重点实验室四川省肿瘤学重点学科川北医学院附属医院放疗科,四川南充637000

出　　处：《中国医学物理学杂志》2011年第6期3021-3024,共4页Chinese Journal of Medical Physics

基　　金：四川省卫生厅科研课题(No.100158)

摘　　要：目的:研究BJ-6B加速器高压调制器新购闸流管调试方法。方法:首先通过逐渐调高调压器输出电压、闸流管触发频率训管,然后调节闸流管灯丝电压寻找工作范围并确定合适工作电压。结果:通过测试,本闸流管在三相调压器输出330 V、闸流管触发频率250 Hz、灯丝电压为5.5 V^6.4 V间,工作稳定,剂量传递准确。选择灯丝电压6 V作为工作点。结论:对新购闸流管首先应训管,然后以出厂标注的参考灯丝电压为起点,逐渐调高和调低闸流管灯丝电压寻找正常工作范围,最后考虑供电网络电压波动确定合适的闸流管工作灯丝电压。Objective: To study the method for adjustment of the new Thyratron in BJ-6B accelerator.Methods: The new thyratron was trained by raising charging voltage of pulse formation net and trigering frequency of it gradually.Then according to the range of working voltage of the thyratron searched by adjusting filament voltage,the proper working voltage of the filament was choosed.Results: By adjustment,this new thyratron worked stably when voltage-regulator outputed 330V,trigering frequency of the thyratron was 250 Hz,and filament voltage was changed between 5.5 V^6.4 V.Meanwhile dose delivered accurately.So working point of filament voltage was set at 6 V.Conclusions: The new thyratron need taining-tube.Then,based on the reference voltage marked by manufacturer the range of filament voltage is searched.Finally,the proper work voltage of the filament is decided by taking power-net voltage fluctuation into account.

关 键 词：加速器 闸流管 调试 

分 类 号：R312[医药卫生—基础医学]