XIPAF磁铁电源电流纹波对慢引出的影响

张琪; 郑曙昕; 李光锐; 姚红娟; 关遐令; 黄文会; 王学武

doi:10.11884/HPLPB201830.170438

XIPAF磁铁电源电流纹波对慢引出的影响

doi: 10.11884/HPLPB201830.170438

张琪^{1, 2, 3,},
郑曙昕^{1, 2, 3, ,},
李光锐^{1, 2, 3},
姚红娟^{1, 2, 3},
关遐令^{1, 2, 3},
黄文会^{1, 2, 3},
王学武^{1, 2, 3}

1.
教育部粒子技术与辐射成像国家重点实验室(清华大学), 北京 100084
2.
清华大学先进辐射源及应用实验室, 北京 100084
3.
清华大学工程物理系, 北京 100084

详细信息

作者简介:
张琪(1992-), 男, 硕士, 从事质子同步加速器慢引出研究; zhang-qi15@mails.tsinghua.edu.cn

通讯作者:
郑曙昕(1972-), 男, 副教授, 从事加速器技术及应用研究; zhengsx@mail.tsinghua.edu.cn

中图分类号: TL507
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- 文章访问数: 1076
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- 被引次数: 0
出版历程
- 收稿日期: 2017-11-06
- 修回日期: 2018-04-19
- 刊出日期: 2018-08-15

Influence of dipole and quadrupole power ripple on slow extraction for XIPAF

Zhang Qi^{1, 2, 3
,},
Zheng Shuxin^{1, 2, 3
, ,},
Li Guangrui^{1, 2, 3},
Yao Hongjuan^{1, 2, 3},
Guan Xialing^{1, 2, 3},
Huang Wenhui^{1, 2, 3},
Wang Xuewu^{1, 2, 3}

1.
Key Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education, Beijing 100084, China
2.
Laboratory for Advanced Radiation Sources and Application, Tsinghua University, Beijing 100084, China
3.
Department of Engineering Physics, Tsinghua University, Beijing 100084, China

摘要

摘要: 从理论和模拟两方面研究了西安质子应用装置二极铁、四极铁电源电流纹波对引出束流的影响，并根据模拟结果确定出以下单种磁铁电源电流纹波标准：对于聚焦四极铁电源，电流纹波/设定值应小于1.2×10^-4；对于散焦四极铁电源，电流纹波/设定值应小于2×10^-3；对于二极铁电源，电流纹波/设定值应小于4×10^-4。因西安质子应用装置同步环上所有磁铁电源采用同一纹波标准，综合考虑所有磁铁电源电流纹波后，最终确定电源电流纹波/设定值应小于1×10^-4。
- RF-KO /
- 电流纹波 /
- 慢引出
Abstract: The third resonant slow extraction and RF-knockout technology was adopted for Xi'an Proton Application Facility (XIPAF), which was designed for proton single event effects research.The influence of dipole and quadrupole power ripple on extracted spill was explored theoretically and simulated via TrackAll.According to a series of simulation results, ΔI/I_set≤1.2×10^-4 for the quadrupole-focusing power converter, ΔI/I_set≤2×10^-3 for the quadrupole defocusing converter andΔI/I_set≤4×10^-4 for the dipole converter are acceptable, whereΔI represents the variance of the ouput current caused by power ripple and I_set represents the standard value of the output current without ripple.Since the synchrotron's power converters in XIPAF satisfy the same standard in terms of power ripple, it is confirmed thatΔI/I_setshould be limited to 1×10^-4 for all power converters.
- RF-KO /
- power supply ripple /
- slow extraction

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图 1 引出束流时间结构示例

Figure 1. Extraction spill structure

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图 2 QF纹波存在情况下引出束流时间结构

Figure 2. Simulation results with quadrupole focusing(QF) ripple

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图 3 QD纹波存在情况下引出束流时间结构

Figure 3. Simulation results with quadrupole defocusing(QD) ripple

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图 4 n_r/n₀随QF纹波幅度的变化关系

Figure 4. n_r/n₀ vs ripple of QF

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图 5 n_r/n₀随QD纹波幅度的变化关系

Figure 5. n_r/n₀ vs ripple of QD

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表 1 模拟相关参数

Table 1. Simulation parameters

parameters	value
energy of the proton beam/MeV	230
horizontal	1.678
vertical tune	1.694
RMS emittance/(mm·mrad)	2.2
revolution frequency/MHz	5.78
central frequency of RF kicker/MHz	3.92
bandwidth of FM/kHz	37

下载: 导出CSV

表 2 XIPAF四极铁参数

Table 2. Quadrupole Parameters of XIPAF

magnet type	length/m	β function/m	K₁
QF	0.24	5.78	0.235
QD	0.24	1.683	-0.800

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参考文献(7)

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