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    • 250MeV回旋加速器高频低电平系统设计

    MU Xueer,YIN Zhiguo,WEI Junyi, LIU Ping, SONG Qiqi

    Atomic Energy Science and Technology（2023）

    中国原子能科学研究院 核技术综合研究所

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    Abstract
    中国原子能科学研究院在研的 250 MeV医用超导回旋加速器的高频控制系统需完成两组功率源的反相驱动,实现四腔体的加速Dee电压稳定、频率稳定及电压平衡调节.为提升高频系统启动速度,增加设计的灵活性,满足质子治疗应用中对加速器输出剂量、电磁兼容设计等的特殊要求,250 MeV 低电平控制系统在原有传统数模混合低电平系统的设计基础上,设计了 FPGA 和 DSP 的混合架构,利用DSP的高速乘法器与多总线结构,有效提升了PID运算速度,增强系统实时数字处理能力;增加了低功率调谐状态,优化了高频系统的启动流程;并创新实现了连续和脉冲的双模式闭环,同时满足日常运行和设备调试的需要.此外,还设计了高频隔离线路,针对医学应用优化系统的电磁兼容特性.
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    Key words
    medical superconducting cyclotron,low level control system,cPCI
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