15-MeV电子直线加速器的低电平系统
15-MeV电子加速器驱动的光中子源装置(TMSRPhoto—Neutron Source Phase1.TPNSl)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(FieldProgrammable Gate Array,FPGA)技术的低电平控制系统,利用上下变频、IQ(In.phaseand QuadraRlre)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%,可达士0.6°。长时间的运行表明,整个数字化环路的响应...
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Published in: | 核技术 Vol. 39; no. 3; pp. 33 - 37 |
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Main Author: | |
Format: | Journal Article |
Language: | Chinese |
Published: |
中国科学院上海应用物理研究所嘉定园区 上海 201800
2016
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Subjects: | |
Online Access: | Get full text |
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Summary: | 15-MeV电子加速器驱动的光中子源装置(TMSRPhoto—Neutron Source Phase1.TPNSl)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(FieldProgrammable Gate Array,FPGA)技术的低电平控制系统,利用上下变频、IQ(In.phaseand QuadraRlre)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%,可达士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。 |
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Bibliography: | ZHANG Junqiang LIU Yajuan ZHONG Shaopeng LI Lin LI Yingmin GU Qiang (Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China) 31-1342/TL Linac, LLRF, FPGA, Waveform acquisition, Feedback control 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 de |
ISSN: | 0253-3219 |
DOI: | 10.11889/j.0253-3219.2016.hjs.39.030403 |