摘要
15-MeV电子加速器驱动的光中子源装置(TMSR Photo-Neutron Source Phase 1,TPNS1)是专为钍基熔盐堆(Thorium Molten Salt Reactor,TMSR)核数据测量设计和建造的。为保证直线加速器提供稳定的、高品质的束流,开发了基于可编程逻辑门阵列(Field Programmable Gate Array,FPGA)技术的低电平控制系统,利用上下变频、IQ(In-phase and Quadrature)调制解调技术实现了直线加速器幅度和相位的反馈控制。经测试,幅度和相位的控制精度达到±0.4%,可达±0.6°。长时间的运行表明,整个数字化环路的响应时间快,稳定性好,满足中子源装置的运行要求。
Background： The photo-neutron source driven by 15-MeV electrons linac in Thorium molten salt reactor （TMSR） program was designed for nuclear data measurement. Purpose： To ensure the linac to provide stable and high quality beam bunches, a low level radio frequency （LLRF） control system based on field programmable gate array （FPGA） was developed. Methods： LLRF realized digital amplitude and phase feedback control by using up-down converter, IQ （In-phase and Quadrature） modulator and demodulator techniques. Results： After commission, the control accuracy of amplitude and phase is less than ±0.4% and ±0.6°, respectively. Conclusion： Long time running indicates that the whole digital control loop has the properties of fast time response and good stability, which meets the demand of photo-neutron facility.
出处
《核技术》
CAS
CSCD
北大核心
2016年第3期33-37,共5页
Nuclear Techniques
基金
中国科学院战略性先导科技专项项目(No.XDA02010100)资助~~
