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CSNS-II超导椭球腔形变电场平坦度仿真分析

李波 刘华昌 王云 吴小磊 李阿红 瞿培华 樊梦旭 陈强

李波, 刘华昌, 王云, 等. CSNS-II超导椭球腔形变电场平坦度仿真分析[J]. 强激光与粒子束, 2021, 33: 034001. doi: 10.11884/HPLPB202133.200259
引用本文: 李波, 刘华昌, 王云, 等. CSNS-II超导椭球腔形变电场平坦度仿真分析[J]. 强激光与粒子束, 2021, 33: 034001. doi: 10.11884/HPLPB202133.200259
Li Bo, Liu Huachang, Wang Yun, et al. Simulating analysis on electric field flatness of deformed superconducting elliptical cavity for CSNS-II linac[J]. High Power Laser and Particle Beams, 2021, 33: 034001. doi: 10.11884/HPLPB202133.200259
Citation: Li Bo, Liu Huachang, Wang Yun, et al. Simulating analysis on electric field flatness of deformed superconducting elliptical cavity for CSNS-II linac[J]. High Power Laser and Particle Beams, 2021, 33: 034001. doi: 10.11884/HPLPB202133.200259

CSNS-II超导椭球腔形变电场平坦度仿真分析

doi: 10.11884/HPLPB202133.200259
基金项目: 广东省基础与应用基础研究基金粤莞联合基金项目(2019B1515120012)
详细信息
    作者简介:

    李波:李 波(1986—),男,硕士,从事粒子加速器加速结构研究;libo0910@ihep.ac.cn

  • 中图分类号: TL53

Simulating analysis on electric field flatness of deformed superconducting elliptical cavity for CSNS-II linac

  • 摘要: 超导椭球腔是一种通过冲压零件和电子束焊接而成型的薄壁结构,在加工过程中存在不可避免的形变,如单元倾斜、偏轴,单元长度偏差,从而影响椭球腔的轴向电场平坦度,进而降低椭球腔的运行电场梯度。因此,在椭球腔加工成型后要进行预调谐处理。椭球腔预调谐是通过对椭球腔整形,包括倾斜和偏轴矫正,单元长度矫正,以达到提高轴向电场平坦度的目的。采用COMSOL多物理场耦合软件对CSNS-II(China Spallation Neutron Source Phase II)超导椭球腔可能存在的形变进行了仿真计算,研究了各单元形变量对电场平坦度的影响,分析了腔体调谐位移量对电场平坦度的影响,为椭球腔预调谐提供数据参考,也为预调谐机的设计研制提供指导。另外,确定了椭球腔机械形变的要求,确保椭球腔机械加工质量满足CSNS-II升级的实际工程需求。
  • 图  1  椭球腔形变示意图。(a)单元倾斜;(b)单元偏轴;(c)单元长度偏差

    Figure  1.  Deformation diagram of elliptical cavity: (a) cell tilt; (b) cell off-axis; (c) cell extrusion or stretching

    图  2  椭球腔电场测量“拉线”系统

    Figure  2.  Electric field measurement “stay wire” system of elliptical cavity

    图  3  椭球腔预调谐整形结构模型简图

    Figure  3.  Pre-tuning reshaping structure model diagram of elliptical cavity

    图  4  不同倾斜量下单元峰值电场强度分布

    Figure  4.  Distribution of peak electric field at axis under different tilt values

    图  5  不同偏轴量下单元峰值电场强度分布

    Figure  5.  Distribution of peak electric field at axis under different off-axis values

    图  6  不同单元长度偏差下单元峰值电场强度分布

    Figure  6.  Distribution of peak electric field at axis under different cell length deviation values

    图  7  椭球腔2 mm调谐位移形变

    Figure  7.  Deformation of elliptical cavity caused by 2 mm tuning displacement

    图  8  不同调谐量下单元峰值电场强度分布

    Figure  8.  Distribution of peak electric field at axis under different tuning values

    表  1  椭球腔机械加工形变要求

    Table  1.   Deformation requirements in machining elliptical cavity

    tilt/mmoff axis/mmextrusion or stretching/mm
    end cell110.06
    sub-end cell110.06
    middle cell210.06
    pre-tuning function×
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-09-09
  • 修回日期:  2020-12-01
  • 网络出版日期:  2021-03-30
  • 刊出日期:  2021-03-05

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