高能光源BPMS独立支架系统设计

王之琢; 曹建社; 王梓豪; 麻惠洲; 何俊; 随艳峰; 岳军会

doi:10.11884/HPLPB201931.190072

高能光源BPMS独立支架系统设计

doi: 10.11884/HPLPB201931.190072

王之琢^{1, 2,},
曹建社^{1, 2, ,},
王梓豪^{1, 2},
麻惠洲¹,
何俊¹,
随艳峰^{1, 2},
岳军会¹

1.
中国科学院高能物理研究所, 北京 100049
2.
中国科学院大学, 北京 100049

基金项目:

国家重大科学基础设施项目发改高技[2016]399号

国家自然科学基金项目 11475204

中国科学院青年创新促进会项目 2016011

详细信息

作者简介:
王之琢(1992－), 男，博士研究生，从事束流测量系统研究；wangzz@ihep.ac.cn

通讯作者:
曹建社，男，研究员，从事束流测量系统研究；caojs@ihep.ac.cn

中图分类号: TB53
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出版历程
- 收稿日期: 2019-03-11
- 修回日期: 2019-05-05
- 刊出日期: 2019-09-15

Independent support system for beam position monitors in HEPS

Wang Zhizhuo^{1, 2
,},
Cao Jianshe^{1, 2
, ,},
Wang Zhihao^{1, 2},
Ma Huizhou¹,
He Jun¹,
Sui Yanfeng^{1, 2},
Yue Junhui¹

1.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 高能光源(HEPS)要求束流轨道稳定性达到0.1 μm。束流位置探测器系统(BPM)作为储存环的重要系统，其测量数据在监测和实现束流轨道稳定中具有重要作用，需要具有长期稳定性。为抑制由于机械振动、环境温度变化导致的机械形变等对BPM探头机械稳定性的影响，需为BPM探头设计独立稳定的支撑系统，使其具有较高的固有频率、较小的振动放大比和较小的温度形变。本文首先考虑温度形变，选取具有良好温度稳定性的Invar36合金作为支架的主体结构材料；为加工及安装方便，杆板结构选作支架模型，通过仿真测试寻找最优结构；利用ANSYS软件中拓扑优化寻找限制空间内实现最大固有频率的模型结构，为支架设计做指导；加工支架实物，并在实验室测量。支架实验室测量结果与仿真结果进行比较，进而优化安装方式。在四种安装方式下对支架进行测试，为支架在光源实地安装提供参考。
- 束流轨道稳定性 /
- BPM独立支架 /
- 机械振动 /
- 拓扑优化
Abstract: A beam orbit stability of 0.1 μm is required by the High Energy Photon Source (HEPS). As an important system of the storage ring, the beam position monitors (BPMs), together with the measured data, play an important role in the beam orbit monitoring and stabilization. Resolution of 0.1μm and long-term stability is required for the BPMs. In order to suppress the mechanical deformation caused by mechanical vibration and temperature variation, an independent and stable support system for the BPM-pick-ups is indispensable to have a higher eigen-frequency in lateral, a smaller vibration amplification ratio, and a minimum temperature deformation factor. In this paper, Invar36 alloy is selected as the main material of the support structure since it has good temperature stability. To ease manufacture and installation, the rod and plate structure is selected for the support prototype, and thorough simulation is done to find the optimal structure. With the methods of topology optimization in ANSYS, the structure prototype of the maximum eigen-frequency is found to guide the design of the support. The support is tested in the laboratory. Comparison between the measurements and the simulation results is made for installation improvement. Four methods of installation is tested and the results will provide reference for the support installation in the storage in the future.
- beam orbit stability /
- BPM independent support /
- mechanical vibration /
- topology optimization

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图 1 支架的杆板结构

Figure 1. Support with rods and spacers

下载: 全尺寸图片幻灯片

图 2 支架横向固有频率与支撑杆间距、隔板厚度的关系

Figure 2. Relationship between lateral eigen frequency of support and rod spacing with different spacer thickness

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图 3 支架原型拓扑优化结果以及用于加工的模型

Figure 3. Support prototype after topology optimization

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图 4 支架地面安装的四种方式

Figure 4. Four mounting methods of support being contacted to ground

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图 5 四种安装方式支架顶端的振动位移PSD

Figure 5. Vibration displacement PSD of four mounting methods

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表 1 材料属性

Table 1. Properties of Material

material	density/(kg/m³)	Young's modulus/Pa	thermal expansion coefficient/℃
structural steel	7850	2×10¹¹	1.2×10^-5
stainless steel	7750	1.93×10¹¹	1.7×10^-5
Invar 36	8050	1.41×10¹¹	1.6×10^-6
concrete	2300	3×10¹⁰	1.4×10^-5

下载: 导出CSV

表 2 四种安装方式的测量结果

Table 2. Results of four contacted methods

mounting methods	eigen frequency of lateral mode/Hz		RMS of support top/nm	RMS of ground/nm
mounting methods	finite element simulation	measurement	RMS of support top/nm	RMS of ground/nm
bolted	60.7	30.2	97	21
board pre-grouted	60.7	36.7	41	21
partly grouted	60.7	37.2	40	21
fully grouted	60.7	40.6	25	21

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参考文献(10)

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