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基于软核的超导腔失效在线补偿系统的研究

肖麟阁 戴建枰 邓子为 朱航

肖麟阁, 戴建枰, 邓子为, 等. 基于软核的超导腔失效在线补偿系统的研究[J]. 强激光与粒子束. doi: 10.11884/HPLPB202133.200287
引用本文: 肖麟阁, 戴建枰, 邓子为, 等. 基于软核的超导腔失效在线补偿系统的研究[J]. 强激光与粒子束. doi: 10.11884/HPLPB202133.200287
Xiao Lin'ge, Dai Jianping, Deng Ziwei, et al. Study of superconducting cavity failure online compensation system based on soft core[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202133.200287
Citation: Xiao Lin'ge, Dai Jianping, Deng Ziwei, et al. Study of superconducting cavity failure online compensation system based on soft core[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202133.200287

基于软核的超导腔失效在线补偿系统的研究

doi: 10.11884/HPLPB202133.200287
基金项目: 国家自然科学基金项目(11575216)
详细信息
    作者简介:

    肖麟阁(1994.3—),男,在读博士生,攻读方向为加速器高频技术;xiaolg@ihep.ac.cn

    通讯作者:

    戴建枰(1968—),男,博士,研究员,从事加速器物理与技术研究;jpdai@ihep.ac.cn

  • 中图分类号: TL503.6

Study of superconducting cavity failure online compensation system based on soft core

  • 摘要: 利用遗传算法较强的鲁棒性以及FPGA在并行计算方面的巨大优势,以中国加速器驱动次临界系统(C-ADS)注入器II的第四个超导加速组元(CM4)为例,开发了超导腔失效在线补偿FPGA程序,并使用束流动力学软件TRACEWIN对FPGA计算结果的可靠性进行验证。然后将其封装为IP核,以更通用的形式在嵌入式Linux系统中使用;同时,针对未来超导腔失效补偿系统的独立性、低延时的要求,应用MicroBlaze软核处理器编译了Linux系统和EPICS组件,在搭建的仿真通讯环境中验证了超导腔失效补偿系统的通信功能。
  • 图  1  遗传算法的工作流程

    Figure  1.  The flow of the genetic algorithm

    图  2  元件的自动拟合系统

    Figure  2.  The automatic fitting system of elements

    图  3  加速缝的纵向传输矩阵中S22项的多项式拟合的值和相对误差

    Figure  3.  The value and relative error of polyfit of S22 in longitudinal transfer matrix of gap

    图  4  FPGA中的遗传算法模块

    Figure  4.  Genetic algorithm module in FPGA

    图  5  正常情况下和补偿后的包络图

    Figure  5.  The envelope diagrams in normal and compensation situations

    图  6  补偿后的归一化RMS发射度增长

    Figure  6.  Normalized RMS emittance growth after compensation

    图  7  系统的硬件平台

    Figure  7.  The hardware platform of the system

    图  8  通信测试平台示意图

    Figure  8.  The communication test platform

    图  9  计算结果设置到PV量的图示

    Figure  9.  Diagram of setting up the calculated parameters to PVs

    表  1  多项式的部分系数

    Table  1.   Partial coefficients of the polynomial

    coefstd errTP>|t|[0.025, 0.975]
    constant−2.12280.009−237.9630.000[−2.140, −2.105]
    $E_{\rm{acc}}{E_{{\rm{in}}}}{\varphi _{\rm{s}}}$−1.95010.005−360.7890.000[−1.961, −1.939]
    $E_{\rm{acc}}^3$−0.00980.005−1.9820.048[−0.19, −0.000]
    $E_{\rm{acc}}E_{{\rm{in}}}^2$−3.33470.012−279.7350.000[−3.358, −3.311]
    $E_{\rm{acc}}\varphi _{\rm{s}}^2$0.05930.00319.2810.000[0.053, 0.065]
    ${E_{{\rm{in}}}}E_{\rm{acc}}^2$−0.34690.007−48.5600.000[−0.361, −0.333]
    $E_{{\rm{in}}}^3$5.56330.023244.0100.000[5.519, 5.608]
    下载: 导出CSV

    表  2  FPGA程序进行补偿计算的结果

    Table  2.   Calculation result of FPGA program

    elementstandard synchronous
    phase/(°)
    compensated synchronous
    phase/(°)
    standard
    ETL/MV
    compensated
    ETL/MV
    elementstandard magnetic
    field/T
    compensated magnetic
    field/T
    cavity1−25−11.891.8832.680sol15.564.29
    cavity2−20−17.901.8901.812sol25.395.06
    cavity3−23null1.874nullsol35.581.76
    cavity4−20−27.171.8462.144sol45.395.39
    cavity5−20−10.821.8142.263sol55.460.45
    下载: 导出CSV

    表  3  出口处标准与补偿后的情况下束流参数对比

    Table  3.   Comparison of beam parameters between the standard case and the compensated case

    parameters βx αx βy αy βz αz beam energy/MeV
    standard value 1.1805 −0.6735 1.1660 −0.6684 3.3297 0.7132 17.3672
    compensated value 1.1475 −0.6741 1.1550 −0.6778 3.1255 0.7394 17.1975
    mismatch factor 1.74% 0.92% 4.90%
    related error 0.98%
    下载: 导出CSV

    表  4  C-ADS部分故障设计指标

    Table  4.   The partial design requirements of failure in C-ADS

    time of tript<1 s1 s<t<10 s10 s<t<5 mint>5 min
    number of trip/yearno limit<25000<2500<25
    下载: 导出CSV
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    Sun Biao. Compensation-rematch for major element failure of the C-ADS linac[D]. Beijing: University of Chinese Academy of Sciences, 2015: 27-30)
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出版历程
  • 收稿日期:  2020-10-16
  • 修回日期:  2021-01-26
  • 网络出版日期:  2021-02-08

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