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325 MHz中β超导Spoke腔的腔型对比和选择

张蒙 贺斐思 潘卫民

张蒙, 贺斐思, 潘卫民. 325 MHz中β超导Spoke腔的腔型对比和选择[J]. 强激光与粒子束, 2019, 31: 115101. doi: 10.11884/HPLPB201931.190081
引用本文: 张蒙, 贺斐思, 潘卫民. 325 MHz中β超导Spoke腔的腔型对比和选择[J]. 强激光与粒子束, 2019, 31: 115101. doi: 10.11884/HPLPB201931.190081
Zhang Meng, He Feisi, Pan Weimin. Design and selection of 325MHz medium β Spoke cavity[J]. High Power Laser and Particle Beams, 2019, 31: 115101. doi: 10.11884/HPLPB201931.190081
Citation: Zhang Meng, He Feisi, Pan Weimin. Design and selection of 325MHz medium β Spoke cavity[J]. High Power Laser and Particle Beams, 2019, 31: 115101. doi: 10.11884/HPLPB201931.190081

325 MHz中β超导Spoke腔的腔型对比和选择

doi: 10.11884/HPLPB201931.190081
基金项目: 

国家重点基础研究发展计划项目 2014CB845505

详细信息
    作者简介:

    张蒙(1993-), 男,硕士,主要从事加速器超导高频Spoke腔的计算仿真方面研究; zhangmeng@ihep.ac.cn

  • 中图分类号: TN815

Design and selection of 325MHz medium β Spoke cavity

  • 摘要: 中国科学院高能物理研究所一直在研究频率为325 MHz、中低β Spoke超导加速腔,以应用在加速器驱动的次临界系统(ADS)的强流质子直线加速器中。通过对超导腔设计方法和设计原则的研究,使用CST仿真软件设计了单Spoke腔、双Spoke腔、三bar Spoke腔三种Spoke腔型。其中三bar Spoke腔和双Spoke腔一样,都有着三个加速间隙,但是Spoke柱的结构不同。在腔型设计中,对三种Spoke腔的模型均作了参数化处理。然后通过CST的参数化扫描来优化腔体形状以使得峰值电场与加速梯度的比值最小,同时使峰值磁场与加速梯度的比值处于较低范围。本文对三种腔型进行了高频结构优化和参数分析,选用了双Spoke腔型作为设计方案,并对电磁场等进行了优化设计。
  • 图  1  CST中建立的三种Spoke腔

    Figure  1.  Spoke cavities established in CST

    图  2  CST中建立的Spoke柱模型

    Figure  2.  poke bar models established in CST

    图  3  Spoke腔对应的LC谐振电路

    Figure  3.  LC resonant circuit corresponding to Spoke cavity

    图  4  CST中建立的Spoke腔模型的切面视图及其主要参数

    Figure  4.  Cut-away views of the Spoke cavity model in CST and the main geometric parameters

    图  5  Spoke腔的空间电场分布和空间磁场分布

    Figure  5.  The distribution of electric field and magnetic field

    图  6  双Spoke腔芯棒中心的尺寸与峰值电场比和R/Q关系的优化曲线

    Figure  6.  EP/Eacc and R/Q vs dimensions of the Spoke aperture

    图  7  双Spoke腔芯棒基部的尺寸与峰值磁场比和R/Q关系的优化曲线

    Figure  7.  BP/Eacc and R/Q vs dimensions of the Spoke base

    图  8  双Spoke腔端盖尺寸与峰值电磁场比和R/Q关系的优化曲线

    Figure  8.  (a) BP/Eacc and R/Q vs D1, (b) BP/Eacc and R/Q vs D2

    表  1  三种腔型高频参数对比

    Table  1.   Major RF performance parameters of three kinds of Spoke cavities

    F/MHz EP/(MV/m) BP/mT Eacc/(MV/m) EP/Eacc (BP/Eacc)/[mT/(MV·m-1)] R/Q G TTFmax
    single Spoke cavity 325.11 5.40 12.54 1.56 3.46 8.03 258 113 0.82
    double Spoke cavity 325.24 4.37 12.09 1.33 3.29 9.10 412 120 0.78
    3-bar cavity 325.09 3.94 7.52 1.03 3.30 6.30 340 127 0.81
    下载: 导出CSV

    表  2  双Spoke腔的详细几何参数

    Table  2.   Main geometric parameters of the double Spoke cavity  (mm)

    Dcav Liris Lcav D D2 He H1 T1 W1 R1 T2 W2 R2
    551 565 748 166 306 91.5 68 51 95 26 167 218 55
    下载: 导出CSV
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    [9] 徐波, 张新颖, 李中泉, 等. 325 MHz低β半波长谐振腔设计[J]. 强激光与粒子束, 2013, 25(9): 2397-2402. doi: 10.3788/HPLPB20132509.2397

    Xu Bo, Zhang Xinying, Li Zhongquan, et al. Design of 325 MHz low beta half wave resonator cavity. High Power Laser and Particle Beams, 2013, 25(9): 2397-2402 doi: 10.3788/HPLPB20132509.2397
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出版历程
  • 收稿日期:  2019-03-28
  • 修回日期:  2019-05-28
  • 刊出日期:  2019-11-15

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