BNCT水冷调谐控制系统设计与实现
Nuclear Techniques（2021）
Spallation Neutron Source Science Center
Abstract
硼中子俘获治疗(Boron Neutron Capture Therapy,BNCT)实验装置中射频四极场(Radio FrequencyQuadrupole 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°C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.
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Key words
boron neutron capture therapy (bnct) experimental device,radio frequency quadrupole field (rfq) acceleration cavity,water-cooled tuning control system
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