中国医疗设备2017，Vol.32Issue(10)：93-96,4.DOI:10.3969/j.issn.1674-1633.2017.10.025
瓦里安2300CD偏转电源隐性故障维修分析
Analysis of Varian 2300CD Covert Fault of Bend Magnet Power Supply Maintenance
唐志全 1曾勇 2苏善宁2
作者信息
- 1. 四川大学华西医院肿瘤中心-生物治疗国家重点实验室-放射物理技术中心,四川 成都 610041
- 2. 广西玉林市红十字会医院 肿瘤科,广西 玉林 537000
- 折叠
摘要
Abstract
Objective By means of analyzing one covert fault of bend magnet power supply of Varian 2300CD linear accelerator, this paper aims to discuss the energy stabilization mechanisms of Varian high energy linear accelerator and the maintenance methods of the bend magnet system. Methods This paper expounded the bend magnet constitution of Varian C-series high energy linear accelerators systematically from twofold view of machine physics and electronics engineering, the programming mechanisms of bend magnet current and the in-box monitor interlock mechanisms, the resistance temperature effect of mental coil, the impedance matching of bend magnet power supply. Conclusion and summary of the difficult and forgettable points of bend magnet machine physics were made. Results The bend magnet system was not only the energy filter but also the energy stabilization mechanism, the slight variation of energy could lead more deviation of overt symmetry, if the symmetry was not out of limits the energy no doubt conforms to the standards. The CAL/CHECK sequence and turn-off steering servo could get rid of dosimetry system fault from symmetry interlocks. Suspends chiller could determine the coils whether or not are over temperature. Conclusion The interlock BMAG is a redundant configuration, even if it occurs covert fault of bend magnet system, the interlocks of symmetry are protective screen of dosimetry risks.关键词
放射治疗/加速器/剂量学/连锁/偏转电源/隐性故障/阻抗匹配Key words
radiation therapy/linear accelerator/dosimetry/interlock/bend magnet power supply/covert fault/impedance matching分类
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唐志全,曾勇,苏善宁..瓦里安2300CD偏转电源隐性故障维修分析[J].中国医疗设备,2017,32(10):93-96,4.
