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王洪磊, 王牧源, 杨际森, 等. BEPCⅡ电子环寄生模损失测量[J]. 强激光与粒子束, 2019, 31: 085102. doi: 10.11884/HPLPB201931.190064
引用本文: 王洪磊, 王牧源, 杨际森, 等. BEPCⅡ电子环寄生模损失测量[J]. 强激光与粒子束, 2019, 31: 085102. doi: 10.11884/HPLPB201931.190064
Wang Honglei, Wang Muyuan, Yang Jisen, et al. Parasitic mode loss measurement in BEPCⅡ e- ring[J]. High Power Laser and Particle Beams, 2019, 31: 085102. doi: 10.11884/HPLPB201931.190064
Citation: Wang Honglei, Wang Muyuan, Yang Jisen, et al. Parasitic mode loss measurement in BEPCⅡ e- ring[J]. High Power Laser and Particle Beams, 2019, 31: 085102. doi: 10.11884/HPLPB201931.190064

BEPCⅡ电子环寄生模损失测量

doi: 10.11884/HPLPB201931.190064
基金项目: 

国家重点研发计划项目 2016YFA0400400

详细信息
    作者简介:

    王洪磊(1990-), 男, 博士研究生, 从事加速器高频技术研究, hlwang@ihep.ac.cn

  • 中图分类号: TL594

Parasitic mode loss measurement in BEPCⅡ e- ring

  • 摘要: BEPCII在设计阶段从束流不稳定性和寄生模损失角度对阻抗提出了限制,但在BEPCII运行中寄生模损失是影响高流强稳定运行的因素之一。针对BEPCII电子环的寄生模损失进行了测量,主要是基于同步相移随流强的微小变化、束流功率测量和高阶模吸收器的功率。测量结果表明:两种方法对比测量全环寄生模损失,结果重复可信,且全环寄生模损失是超导腔寄生模损失的4~5倍。
  • 图  1  同步相位测量装置

    Figure  1.  Experimental setup for the synchronous phase measurement

    图  2  同步相移与腔压的关系

    Figure  2.  Synchronous phase shift vs RF voltage

    图  3  同步相移与流强的关系

    Figure  3.  Synchronous phase shift vs beam current

    图  4  高频功率测量原理

    Figure  4.  Scheme of RF power measurement

    图  5  束流功率和损失能量与流强的关系

    Figure  5.  Beam power and energy loss vs beam current

    图  6  超导腔示意图

    Figure  6.  Schematic diagram of superconducting cavity

    图  7  束流下降过程超导腔高阶模功率和损失参数测量

    Figure  7.  HOM power and loss factor measurement of SC cavity during beam decay

    表  1  测量结果

    Table  1.   Results of measurement

    E/GeV Ib/mA bunch Us/keV σl0/mm Vc/MV Us/keV(measured) Upm/keV(measured)
    phase power phase power
    1.55 600 82(103, 112) 52.8 10.81 1.48 53.6±1.3 51.3±0.9 15.5 12.9
    Note: “phase” represents synchronous phase shift measurement method, “power”represents beam power measurement method
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-03-07
  • 修回日期:  2019-04-10
  • 刊出日期:  2019-08-15

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