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中国散裂中子源加速器束流引出调试和束损优化

黄明阳 许守彦 齐欣 王生

黄明阳, 许守彦, 齐欣, 等. 中国散裂中子源加速器束流引出调试和束损优化[J]. 强激光与粒子束, 2023, 35: 124001. doi: 10.11884/HPLPB202335.230110
引用本文: 黄明阳, 许守彦, 齐欣, 等. 中国散裂中子源加速器束流引出调试和束损优化[J]. 强激光与粒子束, 2023, 35: 124001. doi: 10.11884/HPLPB202335.230110
Huang Mingyang, Xu Shouyan, Qi Xin, et al. Beam extraction commissioning and extraction beam loss optimization for China Spallation Neutron Source accelerator[J]. High Power Laser and Particle Beams, 2023, 35: 124001. doi: 10.11884/HPLPB202335.230110
Citation: Huang Mingyang, Xu Shouyan, Qi Xin, et al. Beam extraction commissioning and extraction beam loss optimization for China Spallation Neutron Source accelerator[J]. High Power Laser and Particle Beams, 2023, 35: 124001. doi: 10.11884/HPLPB202335.230110

中国散裂中子源加速器束流引出调试和束损优化

doi: 10.11884/HPLPB202335.230110
基金项目: 国家自然科学基金项目(12075134);广东省基础与应用基础研究基金项目(2021B1515120021)
详细信息
    作者简介:

    黄明阳,huangmy@ihep.ac.cn

  • 中图分类号: O572.21+1

Beam extraction commissioning and extraction beam loss optimization for China Spallation Neutron Source accelerator

  • 摘要: 引出系统是中国散裂中子源快循环同步加速器的核心组成部分,对束流精确打靶和加速器稳定运行具有重要意义。首先,详细介绍了快循环同步加速器的引出系统和束流引出方案,重点介绍了一些引出系统相关的关键技术。其次,对引出束流调试进行深入研究,包括纵向束流调试、横向束流调试、引出束流分布优化等,其中纵向束流调试主要针对8个引出Kicker定时进行精确标定,横向束流调试主要指Lambertson型磁铁、8个Kicker磁铁、高能输运线模式的匹配设置。最后,对引出束流束损进行深入研究和针对性优化,探索引出束流损失的各种来源,对Lambertson型磁铁漏场、引出束团长度、Kicker波形平顶、Kicker波形变化进行深入研究并对一些新的测量方法进行详细论述。同时,对Lambertson型磁铁入口产生超大辐射热点的现象进行深入研究,寻找其产生大量束流损失的根源,并提出最终解决方案,降低引出束流损失和辐射剂量,使其满足加速器运行要求。
  • 图  1  CSNS引出系统示意图

    Figure  1.  Layout of the CSNS extraction system

    图  2  引出定时控制系统

    Figure  2.  Control system of the extraction timing

    图  3  定时标定后8个Kicker的电流曲线

    Figure  3.  Current curves of 8 Kickers after the timing calibration

    图  4  束流引出过程示意图

    Figure  4.  Layout of the beam extraction process

    图  5  注入束团的时间结构

    Figure  5.  Time structure of the injection beam

    图  6  靶上束流分布图

    Figure  6.  Beam distribution on the target

    图  7  Lambertson型磁铁漏场测量结果

    Figure  7.  Measurement results of the leakage field for the Lambertson magnet

    图  8  Lambertson型磁铁漏场束流测量结果

    Figure  8.  Beam measurement results of the leakage field for the Lambertson magnet

    图  9  打靶束流功率为140 kW时实际引出束团长度测量结果

    Figure  9.  Measurement results of actual bunch length when the beam power on the target is 140 kW

    图  10  8个Kicker波形测量结果

    Figure  10.  Measurement results of 8 Kicker waveforms

    图  11  Kicker波形变化示意图

    Figure  11.  Variation diagrams of Kicker waveform

    图  12  Lambertson型磁铁入口大剂量率热点

    Figure  12.  Large dose rate hotspot at the Lambertson magnet entrance

    图  13  中子探测器(R3MB03INBLM)测量值随准直器垂直接收度变化而变化

    Figure  13.  Neutron detector (R3MB03INBLM) measurement results varying with the collimator vertical acceptance

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    [4] Huang Mingyang, Wang Sheng, Qiu Jing, et al. Effects of injection beam parameters and foil scattering for CSNS/RCS[J]. Chinese Physics C, 2013, 37: 067001. doi: 10.1088/1674-1137/37/6/067001
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    Li Haibo, Qi Xin, Zhang Wenqing, et al. Thyratron trigger characteristics analysis of CSNS kicker power supply[J]. High Power Laser and Particle Beams, 2021, 33: 105003 doi: 10.11884/HPLPB202133.210170
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    Zhai Jun, Shen Li, Li Haibo, et al. Insulation technology of transmission cable terminal for CSNS/RCS extraction pulsed power supply system[J]. High Power Laser and Particle Beams, 2017, 29: 075104 doi: 10.11884/HPLPB201729.160489
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出版历程
  • 收稿日期:  2023-04-30
  • 修回日期:  2023-10-29
  • 录用日期:  2023-10-29
  • 网络出版日期:  2023-11-04
  • 刊出日期:  2023-12-15

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