BNCT水冷调谐控制系统设计与实现  

Design and implementation of water-cooled tuning control system for BNCT

作　　者：梁绍兴 黄金书 叶凡 姜金鑫 欧阳华甫 LIANG Shaoxing;HUANG Jinshu;YE Fan;JIANG Jinxin;OUYANG Huafu(Spallation Neutron Source Science Center,Dongguan 523803,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]散裂中子源科学中心,东莞523803 [2]中国科学院高能物理研究所,北京100049

出　　处：《核技术》2021年第12期27-34,共8页Nuclear Techniques

基　　金：广东省引进创新创业团队项目(No.2017ZT07S225)资助。

摘　　要：硼中子俘获治疗(Boron Neutron Capture Therapy,BNCT)实验装置中射频四极场(Radio Frequency Quadrupole Field,RFQ)加速腔具有选频特性,水冷调谐是调节RFQ加速腔固有谐振频率使之与高频功率的工作频率一致的过程。恒流量工艺循环水冷系统中,去离子水的温度是影响RFQ固有谐振频率的敏感因素,水冷调谐需要保证恒温控制精度达到目标值的±0.1℃以内。基于恒流量工艺循环水冷系统,利用数字高精度温度传感器和高精度升降温执行器等关键设备,设计了一种水冷调谐控制系统,实现了高精度的恒温控制,为RFQ腔壁和腔翼提供了恒温恒流量的冷却水路,使得RFQ加速腔的固有谐振频率稳定可调,从而实现RFQ谐振。目前,该系统已完成开发和调试,并投入正式运行。BNCT水冷调谐控制系统是一套集自动控制、过程可视化、数据采集、历史储存和远程监控等功能于一体的完整系统。[Background] The radio frequency quadrupole field(RFQ) acceleration cavity in the boron neutron capture therapy(BNCT) experimental device has a characteristic of frequency-selectivity. Water cooling tuning is the process of adjusting the natural resonant frequency of RFQ acceleration cavity to make it consistent with the working frequency of high-frequency power. The natural resonance frequency of the RFQ acceleration cavity is sensitive to the temperature of deionized water in the circulating cooling water system of constant flow process. [Purpose] This study aims to design and implement water-cooled tuning system to keep thermostat control within ±0.1℃ of the target value. [Methods] Based on the constant flow process circulating cooling water system, a water-cooled tuning control system was developed by using key equipments such as digital high-precision temperature sensors and highprecision temperature control actuators. A constant-temperature and constant flow cooling water circuit for the RFQ acceleration cavity wall and wing was degined to realize the stability and adjustability of the natural resonance frequency of the RFQ acceleration cavity, and finally achieved the RFQ resonance. [Results & Conclusions] The BNCT water-cooled tuning control system of this study is a complete system with functionalities of automatic control, process visualization, data acquisition, historical data storage and remote monitoring. It has been put into formal operation after implementation and commissioning.

关 键 词：BNCT实验装置 RFQ加速腔 水冷调谐控制系统 

分 类 号：TL503[核科学技术—核技术及应用]