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基于导频技术的数字束流位置测量系统的研制

杨静 杜垚垚 叶强 麻惠洲 汪林 高国栋 唐旭辉 魏书军 岳军会 随艳峰 曹建社

杨静, 杜垚垚, 叶强, 等. 基于导频技术的数字束流位置测量系统的研制[J]. 强激光与粒子束, 2022, 34: 084006. doi: 10.11884/HPLPB202234.220044
引用本文: 杨静, 杜垚垚, 叶强, 等. 基于导频技术的数字束流位置测量系统的研制[J]. 强激光与粒子束, 2022, 34: 084006. doi: 10.11884/HPLPB202234.220044
Yang Jing, Du Yaoyao, Ye Qiang, et al. Development of digital beam position monitor system based on pilot tone technology[J]. High Power Laser and Particle Beams, 2022, 34: 084006. doi: 10.11884/HPLPB202234.220044
Citation: Yang Jing, Du Yaoyao, Ye Qiang, et al. Development of digital beam position monitor system based on pilot tone technology[J]. High Power Laser and Particle Beams, 2022, 34: 084006. doi: 10.11884/HPLPB202234.220044

基于导频技术的数字束流位置测量系统的研制

doi: 10.11884/HPLPB202234.220044
基金项目: 国家自然科学基金青年基金项目(11805221)
详细信息
    作者简介:

    杨静:杨 静,yangjing2018@ihep.ac.cn

    通讯作者:

    曹建社,caojs@ihep.ac.cn

  • 中图分类号: TL506

Development of digital beam position monitor system based on pilot tone technology

  • 摘要: 为改善传统的束流位置测量电子学系统受电子学通道非线性、温度漂移和系统噪声等因素对位置测量精度带来的影响,介绍了一种新型的基于导频技术的数字束流位置测量电子学系统。该系统硬件包括模拟信号采集电子学、数字信号处理电子学和PTC(导频信号耦合)模块;软件包括顶层应用软件和底层驱动,束流信号与导频信号在耦合电路中耦合后,经电子学处理,在FPGA中计算得到归一化后的束流位置信息。实验室测试结果分析,经导频信号归一化处理后能够有效改善各通道随温度变化的现象,束流位置漂移从4.5 μm改善至0.5 μm,分辨率从57.25 nm提升到13.37 nm,并且进行导频信号开关实验更加直观观测导频信号对束流位置测量的在线校正效果。设计的基于导频信号的数字束流位置测量(DBPM)电子学可以高效、实时地实现对加速器束流位置的在线校正,提升电子学系统的实时分辨率性能。
  • 图  1  BPM探头坐标系

    Figure  1.  Coordinate system of BPM probe

    图  2  导频信号原理框图

    Figure  2.  Principle diagram of pilot tone

    图  3  基于导频信号的DBPM电子学系统架构图

    Figure  3.  Architecture diagram of DBPM electronics system based on pilot tone

    图  4  导频信号产生电路设计框图

    Figure  4.  Block diagram of pilot tone generation circuit

    图  5  PTC电路设计框图

    Figure  5.  Block diagram of PTC circuit

    图  6  射频信号处理框图

    Figure  6.  Block diagram of RF signal processing

    图  7  导频信号算法结构框图

    Figure  7.  Algorithm block diagram of pilot tone

    图  8  导频信号耦合电路实物图

    Figure  8.  Picture of PTC circuit

    图  9  PTC耦合电路频谱图

    Figure  9.  Spectrum diagram of PTC circuit

    图  10  射频电路频率响应测试

    Figure  10.  Frequency response test result of RF circuit

    图  11  射频电路线性度测试

    Figure  11.  Linearity test result of RF circuit

    图  12  导频信号耦合电路测试结果

    Figure  12.  Test result of PTC circuit

    图  13  ALC电路测试结果

    Figure  13.  Test result of ALC circuit

    图  14  导频信号时钟抖动测量结果

    Figure  14.  Clock jitter measurement result of pilot tone

    图  15  束流通道随温度变化测试结果

    Figure  15.  Test results of beam channels with temperature

    图  16  归一化通道随温度变化测试结果

    Figure  16.  Test results of normalized channels with temperature

    图  17  长期稳定性测试结果

    Figure  17.  Test results of long-term stability

    图  18  实时分辨率测试结果

    Figure  18.  Test results of real-time resolution

    图  19  导频信号开关测试

    Figure  19.  Test result of pilot tone switch

    表  1  导频信号耦合电路一致性测试

    Table  1.   Conformance test of PTC circuit

    ChannelΔ/dB
    Ch A20.50
    Ch B20.20
    Ch C20.10
    Ch D20.30
    下载: 导出CSV

    表  2  导频信号耦合电路隔离度测试

    Table  2.   Isolation test of PTC circuit

    input
    0 dBm
    output/dBm
    Ch A+PTCh B+PTCh C+PTCh D+PT
    Ch A−2.02−85.04−68.54−75.45
    Ch B−88.73−1.88−82.52−82.92
    Ch C−70.07−80.18−2.03−87.42
    Ch D−91.33−82.98−88.26−1.87
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-02-12
  • 修回日期:  2022-05-16
  • 网络出版日期:  2022-05-28
  • 刊出日期:  2022-07-20

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