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一种非正交对称条带束流位置监测器设计

钱梦翔 吴芳芳 周泽然 周天雨 卢平 孙葆根

钱梦翔, 吴芳芳, 周泽然, 等. 一种非正交对称条带束流位置监测器设计[J]. 强激光与粒子束, 2020, 32: 064002. doi: 10.11884/HPLPB202032.190425
引用本文: 钱梦翔, 吴芳芳, 周泽然, 等. 一种非正交对称条带束流位置监测器设计[J]. 强激光与粒子束, 2020, 32: 064002. doi: 10.11884/HPLPB202032.190425
Qian Mengxiang, Wu Fangfang, Zhou Zeran, et al. Design of a non-orthogonal symmetrical strip beam position monitor[J]. High Power Laser and Particle Beams, 2020, 32: 064002. doi: 10.11884/HPLPB202032.190425
Citation: Qian Mengxiang, Wu Fangfang, Zhou Zeran, et al. Design of a non-orthogonal symmetrical strip beam position monitor[J]. High Power Laser and Particle Beams, 2020, 32: 064002. doi: 10.11884/HPLPB202032.190425

一种非正交对称条带束流位置监测器设计

doi: 10.11884/HPLPB202032.190425
基金项目: 国家自然科学基金项目(11575181,51627901,11705203),中央高校基本科研业务费专项资金项目(WK2310000080)
详细信息
    作者简介:

    钱梦翔(1994—),男,硕士,从事加速器束流诊断研究;qianzy19@mail.ustc.edu.cn

    通讯作者:

    孙葆根(1961—),男,研究员,博士,从事加速器束流诊断研究;bgsun@ustc.edu.cn

  • 中图分类号: TL506

Design of a non-orthogonal symmetrical strip beam position monitor

  • 摘要: 介绍了一种条带束流位置监测器(BPM)的设计与仿真方法。在国家同步辐射实验室“太赫兹近场高通量材料物性测试系统”工程项目中,针对波荡器出口处真空室非正交对称性的问题,设计了矩形真空室和跑道形真空室下的两种非正交对称性条带BPM,并与传统的圆形真空室下条带BPM进行对比。基于边界元法,利用MATLAB软件分别对三种真空室下的条带BPM进行建模和仿真。仿真结果表明:相对于传统的圆形真空室下条带BPM,矩形和跑道形真空室下条带BPM灵敏度提高了30%,阻抗匹配误差相对降低了20%,束流位置拟合误差降低了80%。考虑加工精度,矩形真空室下的条带BPM更适用于该工程。
  • 图  1  矩形真空室建模示意图

    Figure  1.  Modeling with the rectangular vacuum chamber

    图  2  各个条带电极上感应信号的强度

    Figure  2.  Intensity of the induced signal on each stripline electrode

    图  3  条带电极灵敏度

    Figure  3.  Sensitivity of stripline electrode

    图  4  Mapping图

    Figure  4.  Mapping diagrams

    图  5  第一象限下多项式拟合束流位置误差

    Figure  5.  Fitting errors about beam position in the first quadrant,which are got by polynomial fitting

    表  1  不同模式下的电极电压

    Table  1.   Electrode voltages with different modes

    modeVR/VVT/VVL/VVB/V
    dipole1 +1 +1 −1 −1
    dipole2 +1 −1 −1 +1
    quad +1 −1 +1 −1
    sum +1 +1 +1 +1
    下载: 导出CSV

    表  2  不同结构参数下阻抗匹配

    Table  2.   Impedance matching with different structural parameters

    shapeNo.hxhyWxWy$\sqrt {{Z_{{\rm{dipole1}}}}{Z_{{\rm{dipole2}}}}} $/Ω$\sqrt {{Z_{{\rm{quad}}}}{Z_{{\rm{sum}}}}} $/Ωψ/%
    rectangle 1 4.8,4.8,19.4,19.4 49.05 50.92 1.87
    2 6.3,4.0,25.0,15.0 49.21 50.61 1.41
    3 6.2,4.1,26.0,13.8 49.28 50.62 1.34
    racetrack 4 5.5,4.8,24.2,13.4 49.27 50.60 1.33
    5 5.6,4.7,24.6,12.6 49.44 50.72 1.29
    6 5.1,4.7,23.4,12.8 49.38 50.62 1.06
    下载: 导出CSV

    表  3  不同结构参数下的特性参数

    Table  3.   Characteristic parameters with different structural parameters

    shapeNo.sensitivityinductive signalfitting error/μm
    Sx,lnSy,lnUT,BUR,Lrelative sizeΔxΔy
    rectangle 1 0.141 84 0.131 02 100.706 9 31.207 2 3.227 0.29 1.1
    2 0.136 91 0.131 88 78.691 3 42.909 8 1.834 0.26 0.48
    3 0.136 82 0.132 60 74.497 6 43.700 6 1.705 0.24 0.40
    racetrack 4 0.140 15 0.134 84 76.617 6 36.894 2 2.077 0.41 0.48
    5 0.139 37 0.134 85 72.702 4 37.824 9 1.922 0.42 0.35
    6 0.139 4 0.134 49 73.711 3 35.229 2 2.092 0.46 0.39
    下载: 导出CSV

    表  4  不同真空室下各特性参数

    Table  4.   Characteristic parameters with different vacuum chambers

    vacuum chamber shapeψ/%sensitivityinductive signalfitting error/μm
    Sx,lnSy,lnUT,BUR,LΔxΔy
    rectangle 1.34 0.136 82 0.132 60 74.497 6 43.700 6 <0.24 <0.40
    racetrack 1.29 0.139 37 0.134 85 72.702 4 37.824 9 <0.42 <0.35
    circle 1.72 0.103 8 0.103 8 70.180 2 70.172 2 <2.1 <2.0
    下载: 导出CSV
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    Li Jihao. Research of stripline BPM syetem at HLS LINAC. Hefei: University of Science and Technology of China, 2006: 11-33
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出版历程
  • 收稿日期:  2019-11-11
  • 修回日期:  2020-03-09
  • 刊出日期:  2020-05-12

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